Tìm kiếm gần đúng thức ăn trong phần mềm Quản lý quán cafe với C# Winform

Không có gì tuyệt vời hơn là luyện tập với ví dụ thực tế. Nào cùng nhau thử thách bản thân với phần mềm: Quản lý quán cafe

Bạn nên có kiến thức về:

• Lập trình Winform cơ bản
• Delegate – Event
• SQL server
• Xử lý ngày tháng năm

Code data.sql

CREATE DATABASE QuanLyQuanCafe
GO

USE QuanLyQuanCafe
GO

-- Food
-- Table
-- FoodCategory
-- Account
-- Bill
-- BillInfo

CREATE TABLE TableFood
(
	id INT IDENTITY PRIMARY KEY,
	name NVARCHAR(100) NOT NULL DEFAULT N'Bàn chưa có tên',
	status NVARCHAR(100) NOT NULL DEFAULT N'Trống'	-- Trống || Có người
)
GO

CREATE TABLE Account
(
	UserName NVARCHAR(100) PRIMARY KEY,	
	DisplayName NVARCHAR(100) NOT NULL DEFAULT N'Kter',
	PassWord NVARCHAR(1000) NOT NULL DEFAULT 0,
	Type INT NOT NULL  DEFAULT 0 -- 1: admin && 0: staff
)
GO

CREATE TABLE FoodCategory
(
	id INT IDENTITY PRIMARY KEY,
	name NVARCHAR(100) NOT NULL DEFAULT N'Chưa đặt tên'
)
GO

CREATE TABLE Food
(
	id INT IDENTITY PRIMARY KEY,
	name NVARCHAR(100) NOT NULL DEFAULT N'Chưa đặt tên',
	idCategory INT NOT NULL,
	price FLOAT NOT NULL DEFAULT 0
	
	FOREIGN KEY (idCategory) REFERENCES dbo.FoodCategory(id)
)
GO

CREATE TABLE Bill
(
	id INT IDENTITY PRIMARY KEY,
	DateCheckIn DATE NOT NULL DEFAULT GETDATE(),
	DateCheckOut DATE,
	idTable INT NOT NULL,
	status INT NOT NULL DEFAULT 0 -- 1: đã thanh toán && 0: chưa thanh toán
	
	FOREIGN KEY (idTable) REFERENCES dbo.TableFood(id)
)
GO

CREATE TABLE BillInfo
(
	id INT IDENTITY PRIMARY KEY,
	idBill INT NOT NULL,
	idFood INT NOT NULL,
	count INT NOT NULL DEFAULT 0
	
	FOREIGN KEY (idBill) REFERENCES dbo.Bill(id),
	FOREIGN KEY (idFood) REFERENCES dbo.Food(id)
)
GO

INSERT INTO dbo.Account
        ( UserName ,
          DisplayName ,
          PassWord ,
          Type
        )
VALUES  ( N'K9' , -- UserName - nvarchar(100)
          N'RongK9' , -- DisplayName - nvarchar(100)
          N'1' , -- PassWord - nvarchar(1000)
          1  -- Type - int
        )
INSERT INTO dbo.Account
        ( UserName ,
          DisplayName ,
          PassWord ,
          Type
        )
VALUES  ( N'staff' , -- UserName - nvarchar(100)
          N'staff' , -- DisplayName - nvarchar(100)
          N'1' , -- PassWord - nvarchar(1000)
          0  -- Type - int
        )
GO

CREATE PROC USP_GetAccountByUserName
@userName nvarchar(100)
AS 
BEGIN
	SELECT * FROM dbo.Account WHERE UserName = @userName
END
GO

EXEC dbo.USP_GetAccountByUserName @userName = N'k9' -- nvarchar(100)

GO

CREATE PROC USP_Login
@userName nvarchar(100), @passWord nvarchar(100)
AS
BEGIN
	SELECT * FROM dbo.Account WHERE UserName = @userName AND PassWord = @passWord
END
GO

-- thêm bàn
DECLARE @i INT = 0

WHILE @i <= 10
BEGIN
	INSERT dbo.TableFood ( name)VALUES  ( N'Bàn ' + CAST(@i AS nvarchar(100)))
	SET @i = @i + 1
END
GO

CREATE PROC USP_GetTableList
AS SELECT * FROM dbo.TableFood
GO

UPDATE dbo.TableFood SET STATUS = N'Có người' WHERE id = 9

EXEC dbo.USP_GetTableList
GO

-- thêm category
INSERT dbo.FoodCategory
        ( name )
VALUES  ( N'Hải sản'  -- name - nvarchar(100)
          )
INSERT dbo.FoodCategory
        ( name )
VALUES  ( N'Nông sản' )
INSERT dbo.FoodCategory
        ( name )
VALUES  ( N'Lâm sản' )
INSERT dbo.FoodCategory
        ( name )
VALUES  ( N'Sản sản' )
INSERT dbo.FoodCategory
        ( name )
VALUES  ( N'Nước' )

-- thêm món ăn
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Mực một nắng nước sa tế', -- name - nvarchar(100)
          1, -- idCategory - int
          120000)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Nghêu hấp xả', 1, 50000)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Dú dê nướng sữa', 2, 60000)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Heo rừng nướng muối ớt', 3, 75000)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Cơm chiên mushi', 4, 999999)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'7Up', 5, 15000)
INSERT dbo.Food
        ( name, idCategory, price )
VALUES  ( N'Cafe', 5, 12000)

-- thêm bill
INSERT	dbo.Bill
        ( DateCheckIn ,
          DateCheckOut ,
          idTable ,
          status
        )
VALUES  ( GETDATE() , -- DateCheckIn - date
          NULL , -- DateCheckOut - date
          3 , -- idTable - int
          0  -- status - int
        )
        
INSERT	dbo.Bill
        ( DateCheckIn ,
          DateCheckOut ,
          idTable ,
          status
        )
VALUES  ( GETDATE() , -- DateCheckIn - date
          NULL , -- DateCheckOut - date
          4, -- idTable - int
          0  -- status - int
        )
INSERT	dbo.Bill
        ( DateCheckIn ,
          DateCheckOut ,
          idTable ,
          status
        )
VALUES  ( GETDATE() , -- DateCheckIn - date
          GETDATE() , -- DateCheckOut - date
          5 , -- idTable - int
          1  -- status - int
        )

-- thêm bill info
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 5, -- idBill - int
          1, -- idFood - int
          2  -- count - int
          )
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 5, -- idBill - int
          3, -- idFood - int
          4  -- count - int
          )
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 5, -- idBill - int
          5, -- idFood - int
          1  -- count - int
          )
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 6, -- idBill - int
          1, -- idFood - int
          2  -- count - int
          )
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 6, -- idBill - int
          6, -- idFood - int
          2  -- count - int
          )
INSERT	dbo.BillInfo
        ( idBill, idFood, count )
VALUES  ( 7, -- idBill - int
          5, -- idFood - int
          2  -- count - int
          )         
          
GO

CREATE PROC USP_InsertBill
@idTable INT
AS
BEGIN
	INSERT dbo.Bill 
	        ( DateCheckIn ,
	          DateCheckOut ,
	          idTable ,
	          status,
	          discount
	        )
	VALUES  ( GETDATE() , -- DateCheckIn - date
	          NULL , -- DateCheckOut - date
	          @idTable , -- idTable - int
	          0,  -- status - int
	          0
	        )
END
GO

CREATE PROC USP_InsertBillInfo
@idBill INT, @idFood INT, @count INT
AS
BEGIN

	DECLARE @isExitsBillInfo INT
	DECLARE @foodCount INT = 1
	
	SELECT @isExitsBillInfo = id, @foodCount = b.count 
	FROM dbo.BillInfo AS b 
	WHERE idBill = @idBill AND idFood = @idFood

	IF (@isExitsBillInfo > 0)
	BEGIN
		DECLARE @newCount INT = @foodCount + @count
		IF (@newCount > 0)
			UPDATE dbo.BillInfo	SET count = @foodCount + @count WHERE idFood = @idFood
		ELSE
			DELETE dbo.BillInfo WHERE idBill = @idBill AND idFood = @idFood
	END
	ELSE
	BEGIN
		INSERT	dbo.BillInfo
        ( idBill, idFood, count )
		VALUES  ( @idBill, -- idBill - int
          @idFood, -- idFood - int
          @count  -- count - int
          )
	END
END
GO

DELETE dbo.BillInfo

DELETE dbo.Bill

CREATE TRIGGER UTG_UpdateBillInfo
ON dbo.BillInfo FOR INSERT, UPDATE
AS
BEGIN
	DECLARE @idBill INT
	
	SELECT @idBill = idBill FROM Inserted
	
	DECLARE @idTable INT
	
	SELECT @idTable = idTable FROM dbo.Bill WHERE id = @idBill AND status = 0	
	
	DECLARE @count INT
	SELECT @count = COUNT(*) FROM dbo.BillInfo WHERE idBill = @idBill
	
	IF (@count > 0)
	BEGIN
	
		PRINT @idTable
		PRINT @idBill
		PRINT @count
		
		UPDATE dbo.TableFood SET status = N'Có người' WHERE id = @idTable		
		
	END		
	ELSE
	BEGIN
	PRINT @idTable
		PRINT @idBill
		PRINT @count
	UPDATE dbo.TableFood SET status = N'Trống' WHERE id = @idTable	
	end
	
END
GO


CREATE TRIGGER UTG_UpdateBill
ON dbo.Bill FOR UPDATE
AS
BEGIN
	DECLARE @idBill INT
	
	SELECT @idBill = id FROM Inserted	
	
	DECLARE @idTable INT
	
	SELECT @idTable = idTable FROM dbo.Bill WHERE id = @idBill
	
	DECLARE @count int = 0
	
	SELECT @count = COUNT(*) FROM dbo.Bill WHERE idTable = @idTable AND status = 0
	
	IF (@count = 0)
		UPDATE dbo.TableFood SET status = N'Trống' WHERE id = @idTable
END
GO

ALTER TABLE dbo.Bill
ADD discount INT

UPDATE dbo.Bill SET discount = 0
GO


CREATE PROC USP_SwitchTabel
@idTable1 INT, @idTable2 int
AS BEGIN

	DECLARE @idFirstBill int
	DECLARE @idSeconrdBill INT
	
	DECLARE @isFirstTablEmty INT = 1
	DECLARE @isSecondTablEmty INT = 1
	
	
	SELECT @idSeconrdBill = id FROM dbo.Bill WHERE idTable = @idTable2 AND status = 0
	SELECT @idFirstBill = id FROM dbo.Bill WHERE idTable = @idTable1 AND status = 0
	
	PRINT @idFirstBill
	PRINT @idSeconrdBill
	PRINT '-----------'
	
	IF (@idFirstBill IS NULL)
	BEGIN
		PRINT '0000001'
		INSERT dbo.Bill
		        ( DateCheckIn ,
		          DateCheckOut ,
		          idTable ,
		          status
		        )
		VALUES  ( GETDATE() , -- DateCheckIn - date
		          NULL , -- DateCheckOut - date
		          @idTable1 , -- idTable - int
		          0  -- status - int
		        )
		        
		SELECT @idFirstBill = MAX(id) FROM dbo.Bill WHERE idTable = @idTable1 AND status = 0
		
	END
	
	SELECT @isFirstTablEmty = COUNT(*) FROM dbo.BillInfo WHERE idBill = @idFirstBill
	
	PRINT @idFirstBill
	PRINT @idSeconrdBill
	PRINT '-----------'
	
	IF (@idSeconrdBill IS NULL)
	BEGIN
		PRINT '0000002'
		INSERT dbo.Bill
		        ( DateCheckIn ,
		          DateCheckOut ,
		          idTable ,
		          status
		        )
		VALUES  ( GETDATE() , -- DateCheckIn - date
		          NULL , -- DateCheckOut - date
		          @idTable2 , -- idTable - int
		          0  -- status - int
		        )
		SELECT @idSeconrdBill = MAX(id) FROM dbo.Bill WHERE idTable = @idTable2 AND status = 0
		
	END
	
	SELECT @isSecondTablEmty = COUNT(*) FROM dbo.BillInfo WHERE idBill = @idSeconrdBill
	
	PRINT @idFirstBill
	PRINT @idSeconrdBill
	PRINT '-----------'

	SELECT id INTO IDBillInfoTable FROM dbo.BillInfo WHERE idBill = @idSeconrdBill
	
	UPDATE dbo.BillInfo SET idBill = @idSeconrdBill WHERE idBill = @idFirstBill
	
	UPDATE dbo.BillInfo SET idBill = @idFirstBill WHERE id IN (SELECT * FROM IDBillInfoTable)
	
	DROP TABLE IDBillInfoTable
	
	IF (@isFirstTablEmty = 0)
		UPDATE dbo.TableFood SET status = N'Trống' WHERE id = @idTable2
		
	IF (@isSecondTablEmty= 0)
		UPDATE dbo.TableFood SET status = N'Trống' WHERE id = @idTable1
END
GO

ALTER TABLE dbo.Bill ADD totalPrice FLOAT

DELETE dbo.BillInfo
DELETE dbo.Bill

GO

CREATE PROC USP_GetListBillByDate
@checkIn date, @checkOut date
AS 
BEGIN
	SELECT t.name AS [Tên bàn], b.totalPrice AS [Tổng tiền], DateCheckIn AS [Ngày vào], DateCheckOut AS [Ngày ra], discount AS [Giảm giá]
	FROM dbo.Bill AS b,dbo.TableFood AS t
	WHERE DateCheckIn >= @checkIn AND DateCheckOut <= @checkOut AND b.status = 1
	AND t.id = b.idTable
END
GO

CREATE PROC USP_UpdateAccount
@userName NVARCHAR(100), @displayName NVARCHAR(100), @password NVARCHAR(100), @newPassword NVARCHAR(100)
AS
BEGIN
	DECLARE @isRightPass INT = 0
	
	SELECT @isRightPass = COUNT(*) FROM dbo.Account WHERE USERName = @userName AND PassWord = @password
	
	IF (@isRightPass = 1)
	BEGIN
		IF (@newPassword = NULL OR @newPassword = '')
		BEGIN
			UPDATE dbo.Account SET DisplayName = @displayName WHERE UserName = @userName
		END		
		ELSE
			UPDATE dbo.Account SET DisplayName = @displayName, PassWord = @newPassword WHERE UserName = @userName
	end
END
GO

CREATE TRIGGER UTG_DeleteBillInfo
ON dbo.BillInfo FOR DELETE
AS 
BEGIN
	DECLARE @idBillInfo INT
	DECLARE @idBill INT
	SELECT @idBillInfo = id, @idBill = Deleted.idBill FROM Deleted
	
	DECLARE @idTable INT
	SELECT @idTable = idTable FROM dbo.Bill WHERE id = @idBill
	
	DECLARE @count INT = 0
	
	SELECT @count = COUNT(*) FROM dbo.BillInfo AS bi, dbo.Bill AS b WHERE b.id = bi.idBill AND b.id = @idBill AND b.status = 0
	
	IF (@count = 0)
		UPDATE dbo.TableFood SET status = N'Trống' WHERE id = @idTable
END
GO


CREATE FUNCTION [dbo].[fuConvertToUnsign1] ( @strInput NVARCHAR(4000) ) RETURNS NVARCHAR(4000) AS BEGIN IF @strInput IS NULL RETURN @strInput IF @strInput = '' RETURN @strInput DECLARE @RT NVARCHAR(4000) DECLARE @SIGN_CHARS NCHAR(136) DECLARE @UNSIGN_CHARS NCHAR (136) SET @SIGN_CHARS = N'ăâđêôơưàảãạáằẳẵặắầẩẫậấèẻẽẹéềểễệế ìỉĩịíòỏõọóồổỗộốờởỡợớùủũụúừửữựứỳỷỹỵý ĂÂĐÊÔƠƯÀẢÃẠÁẰẲẴẶẮẦẨẪẬẤÈẺẼẸÉỀỂỄỆẾÌỈĨỊÍ ÒỎÕỌÓỒỔỖỘỐỜỞỠỢỚÙỦŨỤÚỪỬỮỰỨỲỶỸỴÝ' +NCHAR(272)+ NCHAR(208) SET @UNSIGN_CHARS = N'aadeoouaaaaaaaaaaaaaaaeeeeeeeeee iiiiiooooooooooooooouuuuuuuuuuyyyyy AADEOOUAAAAAAAAAAAAAAAEEEEEEEEEEIIIII OOOOOOOOOOOOOOOUUUUUUUUUUYYYYYDD' DECLARE @COUNTER int DECLARE @COUNTER1 int SET @COUNTER = 1 WHILE (@COUNTER <=LEN(@strInput)) BEGIN SET @COUNTER1 = 1 WHILE (@COUNTER1 <=LEN(@SIGN_CHARS)+1) BEGIN IF UNICODE(SUBSTRING(@SIGN_CHARS, @COUNTER1,1)) = UNICODE(SUBSTRING(@strInput,@COUNTER ,1) ) BEGIN IF @COUNTER=1 SET @strInput = SUBSTRING(@UNSIGN_CHARS, @COUNTER1,1) + SUBSTRING(@strInput, @COUNTER+1,LEN(@strInput)-1) ELSE SET @strInput = SUBSTRING(@strInput, 1, @COUNTER-1) +SUBSTRING(@UNSIGN_CHARS, @COUNTER1,1) + SUBSTRING(@strInput, @COUNTER+1,LEN(@strInput)- @COUNTER) BREAK END SET @COUNTER1 = @COUNTER1 +1 END SET @COUNTER = @COUNTER +1 END SET @strInput = replace(@strInput,' ','-') RETURN @strInput END

Code FoodDAO.cs

using QuanLyQuanCafe.DTO;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace QuanLyQuanCafe.DAO
{
    public class FoodDAO
    {
        private static FoodDAO instance;

        public static FoodDAO Instance
        {
            get { if (instance == null)instance = new FoodDAO(); return FoodDAO.instance; }
            private set { FoodDAO.instance = value; }
        }

        private FoodDAO() { }

        public List<Food> GetFoodByCategoryID(int id)
        {
            List<Food> list = new List<Food>();

            string query = "select * from Food where idCategory = " + id;

            DataTable data = DataProvider.Instance.ExecuteQuery(query);

            foreach (DataRow item in data.Rows)
            {
                Food food = new Food(item);
                list.Add(food);
            }

            return list;
        }

        public List<Food> GetListFood()
        {
            List<Food> list = new List<Food>();

            string query = "select * from Food";

            DataTable data = DataProvider.Instance.ExecuteQuery(query);

            foreach (DataRow item in data.Rows)
            {
                Food food = new Food(item);
                list.Add(food);
            }

            return list;
        }

        public List<Food> SearchFoodByName(string name)
        {
            List<Food> list = new List<Food>();

            string query = string.Format("SELECT * FROM dbo.Food WHERE dbo.fuConvertToUnsign1(name) LIKE N'%' + dbo.fuConvertToUnsign1(N'{0}') + '%'", name);

            DataTable data = DataProvider.Instance.ExecuteQuery(query);

            foreach (DataRow item in data.Rows)
            {
                Food food = new Food(item);
                list.Add(food);
            }

            return list;
        }

        public bool InsertFood(string name, int id, float price)
        {
            string query = string.Format("INSERT dbo.Food ( name, idCategory, price )VALUES  ( N'{0}', {1}, {2})", name, id, price);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }

        public bool UpdateFood(int idFood, string name, int id, float price)
        {
            string query = string.Format("UPDATE dbo.Food SET name = N'{0}', idCategory = {1}, price = {2} WHERE id = {3}", name, id, price, idFood);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }

        public bool DeleteFood(int idFood)
        {
            BillInfoDAO.Instance.DeleteBillInfoByFoodID(idFood);

            string query = string.Format("Delete Food where id = {0}",idFood);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }
    }
}

Code fAdmin.Designer.cs

namespace QuanLyQuanCafe
{
    partial class fAdmin
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.tcAdmin = new System.Windows.Forms.TabControl();
            this.tpBill = new System.Windows.Forms.TabPage();
            this.panel2 = new System.Windows.Forms.Panel();
            this.btnViewBill = new System.Windows.Forms.Button();
            this.dtpkToDate = new System.Windows.Forms.DateTimePicker();
            this.dtpkFromDate = new System.Windows.Forms.DateTimePicker();
            this.panel1 = new System.Windows.Forms.Panel();
            this.dtgvBill = new System.Windows.Forms.DataGridView();
            this.tpFood = new System.Windows.Forms.TabPage();
            this.panel6 = new System.Windows.Forms.Panel();
            this.txbSearchFoodName = new System.Windows.Forms.TextBox();
            this.btnSearchFood = new System.Windows.Forms.Button();
            this.panel5 = new System.Windows.Forms.Panel();
            this.panel10 = new System.Windows.Forms.Panel();
            this.nmFoodPrice = new System.Windows.Forms.NumericUpDown();
            this.label4 = new System.Windows.Forms.Label();
            this.panel9 = new System.Windows.Forms.Panel();
            this.cbFoodCategory = new System.Windows.Forms.ComboBox();
            this.label3 = new System.Windows.Forms.Label();
            this.panel8 = new System.Windows.Forms.Panel();
            this.txbFoodName = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.panel7 = new System.Windows.Forms.Panel();
            this.txbFoodID = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.panel4 = new System.Windows.Forms.Panel();
            this.btnShowFood = new System.Windows.Forms.Button();
            this.btnEditFood = new System.Windows.Forms.Button();
            this.btnDeleteFood = new System.Windows.Forms.Button();
            this.btnAddFood = new System.Windows.Forms.Button();
            this.panel3 = new System.Windows.Forms.Panel();
            this.dtgvFood = new System.Windows.Forms.DataGridView();
            this.tbFoodCategory = new System.Windows.Forms.TabPage();
            this.panel12 = new System.Windows.Forms.Panel();
            this.panel15 = new System.Windows.Forms.Panel();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.label7 = new System.Windows.Forms.Label();
            this.panel16 = new System.Windows.Forms.Panel();
            this.txbCategoryID = new System.Windows.Forms.TextBox();
            this.label8 = new System.Windows.Forms.Label();
            this.panel17 = new System.Windows.Forms.Panel();
            this.btnShowCategory = new System.Windows.Forms.Button();
            this.btnEditCategory = new System.Windows.Forms.Button();
            this.btnDeleteCategory = new System.Windows.Forms.Button();
            this.btnAddCategory = new System.Windows.Forms.Button();
            this.panel18 = new System.Windows.Forms.Panel();
            this.dtgvCategory = new System.Windows.Forms.DataGridView();
            this.tpTable = new System.Windows.Forms.TabPage();
            this.panel11 = new System.Windows.Forms.Panel();
            this.panel21 = new System.Windows.Forms.Panel();
            this.cbTableStatus = new System.Windows.Forms.ComboBox();
            this.label9 = new System.Windows.Forms.Label();
            this.panel13 = new System.Windows.Forms.Panel();
            this.txbTableName = new System.Windows.Forms.TextBox();
            this.label5 = new System.Windows.Forms.Label();
            this.panel14 = new System.Windows.Forms.Panel();
            this.textBox3 = new System.Windows.Forms.TextBox();
            this.label6 = new System.Windows.Forms.Label();
            this.panel19 = new System.Windows.Forms.Panel();
            this.btnShowTable = new System.Windows.Forms.Button();
            this.btnEditTable = new System.Windows.Forms.Button();
            this.btnDeleteTable = new System.Windows.Forms.Button();
            this.btnAddTable = new System.Windows.Forms.Button();
            this.panel20 = new System.Windows.Forms.Panel();
            this.dtgvTable = new System.Windows.Forms.DataGridView();
            this.tpAccount = new System.Windows.Forms.TabPage();
            this.panel23 = new System.Windows.Forms.Panel();
            this.btnResetPassword = new System.Windows.Forms.Button();
            this.panel25 = new System.Windows.Forms.Panel();
            this.cbAccountType = new System.Windows.Forms.ComboBox();
            this.label11 = new System.Windows.Forms.Label();
            this.panel26 = new System.Windows.Forms.Panel();
            this.txbDisplayName = new System.Windows.Forms.TextBox();
            this.label12 = new System.Windows.Forms.Label();
            this.panel27 = new System.Windows.Forms.Panel();
            this.txbUserName = new System.Windows.Forms.TextBox();
            this.label13 = new System.Windows.Forms.Label();
            this.panel28 = new System.Windows.Forms.Panel();
            this.btnShowAccount = new System.Windows.Forms.Button();
            this.btnEditAccount = new System.Windows.Forms.Button();
            this.btnDeleteAccount = new System.Windows.Forms.Button();
            this.btnAddAccount = new System.Windows.Forms.Button();
            this.panel29 = new System.Windows.Forms.Panel();
            this.dtgvAccount = new System.Windows.Forms.DataGridView();
            this.tcAdmin.SuspendLayout();
            this.tpBill.SuspendLayout();
            this.panel2.SuspendLayout();
            this.panel1.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dtgvBill)).BeginInit();
            this.tpFood.SuspendLayout();
            this.panel6.SuspendLayout();
            this.panel5.SuspendLayout();
            this.panel10.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmFoodPrice)).BeginInit();
            this.panel9.SuspendLayout();
            this.panel8.SuspendLayout();
            this.panel7.SuspendLayout();
            this.panel4.SuspendLayout();
            this.panel3.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dtgvFood)).BeginInit();
            this.tbFoodCategory.SuspendLayout();
            this.panel12.SuspendLayout();
            this.panel15.SuspendLayout();
            this.panel16.SuspendLayout();
            this.panel17.SuspendLayout();
            this.panel18.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dtgvCategory)).BeginInit();
            this.tpTable.SuspendLayout();
            this.panel11.SuspendLayout();
            this.panel21.SuspendLayout();
            this.panel13.SuspendLayout();
            this.panel14.SuspendLayout();
            this.panel19.SuspendLayout();
            this.panel20.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dtgvTable)).BeginInit();
            this.tpAccount.SuspendLayout();
            this.panel23.SuspendLayout();
            this.panel25.SuspendLayout();
            this.panel26.SuspendLayout();
            this.panel27.SuspendLayout();
            this.panel28.SuspendLayout();
            this.panel29.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.dtgvAccount)).BeginInit();
            this.SuspendLayout();
            // 
            // tcAdmin
            // 
            this.tcAdmin.Controls.Add(this.tpBill);
            this.tcAdmin.Controls.Add(this.tpFood);
            this.tcAdmin.Controls.Add(this.tbFoodCategory);
            this.tcAdmin.Controls.Add(this.tpTable);
            this.tcAdmin.Controls.Add(this.tpAccount);
            this.tcAdmin.Location = new System.Drawing.Point(12, 12);
            this.tcAdmin.Name = "tcAdmin";
            this.tcAdmin.SelectedIndex = 0;
            this.tcAdmin.Size = new System.Drawing.Size(658, 439);
            this.tcAdmin.TabIndex = 0;
            // 
            // tpBill
            // 
            this.tpBill.Controls.Add(this.panel2);
            this.tpBill.Controls.Add(this.panel1);
            this.tpBill.Location = new System.Drawing.Point(4, 22);
            this.tpBill.Name = "tpBill";
            this.tpBill.Padding = new System.Windows.Forms.Padding(3);
            this.tpBill.Size = new System.Drawing.Size(650, 413);
            this.tpBill.TabIndex = 0;
            this.tpBill.Text = "Doanh thu";
            this.tpBill.UseVisualStyleBackColor = true;
            // 
            // panel2
            // 
            this.panel2.Controls.Add(this.btnViewBill);
            this.panel2.Controls.Add(this.dtpkToDate);
            this.panel2.Controls.Add(this.dtpkFromDate);
            this.panel2.Location = new System.Drawing.Point(6, 6);
            this.panel2.Name = "panel2";
            this.panel2.Size = new System.Drawing.Size(638, 26);
            this.panel2.TabIndex = 1;
            // 
            // btnViewBill
            // 
            this.btnViewBill.Location = new System.Drawing.Point(282, 0);
            this.btnViewBill.Name = "btnViewBill";
            this.btnViewBill.Size = new System.Drawing.Size(75, 23);
            this.btnViewBill.TabIndex = 2;
            this.btnViewBill.Text = "Thống kê";
            this.btnViewBill.UseVisualStyleBackColor = true;
            this.btnViewBill.Click += new System.EventHandler(this.btnViewBill_Click);
            // 
            // dtpkToDate
            // 
            this.dtpkToDate.Location = new System.Drawing.Point(435, 3);
            this.dtpkToDate.Name = "dtpkToDate";
            this.dtpkToDate.Size = new System.Drawing.Size(200, 20);
            this.dtpkToDate.TabIndex = 1;
            // 
            // dtpkFromDate
            // 
            this.dtpkFromDate.Location = new System.Drawing.Point(3, 3);
            this.dtpkFromDate.Name = "dtpkFromDate";
            this.dtpkFromDate.Size = new System.Drawing.Size(200, 20);
            this.dtpkFromDate.TabIndex = 0;
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.dtgvBill);
            this.panel1.Location = new System.Drawing.Point(6, 38);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(638, 369);
            this.panel1.TabIndex = 0;
            // 
            // dtgvBill
            // 
            this.dtgvBill.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fill;
            this.dtgvBill.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dtgvBill.Location = new System.Drawing.Point(3, 3);
            this.dtgvBill.Name = "dtgvBill";
            this.dtgvBill.Size = new System.Drawing.Size(632, 363);
            this.dtgvBill.TabIndex = 0;
            // 
            // tpFood
            // 
            this.tpFood.Controls.Add(this.panel6);
            this.tpFood.Controls.Add(this.panel5);
            this.tpFood.Controls.Add(this.panel4);
            this.tpFood.Controls.Add(this.panel3);
            this.tpFood.Location = new System.Drawing.Point(4, 22);
            this.tpFood.Name = "tpFood";
            this.tpFood.Padding = new System.Windows.Forms.Padding(3);
            this.tpFood.Size = new System.Drawing.Size(650, 413);
            this.tpFood.TabIndex = 1;
            this.tpFood.Text = "Thức ăn";
            this.tpFood.UseVisualStyleBackColor = true;
            // 
            // panel6
            // 
            this.panel6.Controls.Add(this.txbSearchFoodName);
            this.panel6.Controls.Add(this.btnSearchFood);
            this.panel6.Location = new System.Drawing.Point(361, 3);
            this.panel6.Name = "panel6";
            this.panel6.Size = new System.Drawing.Size(283, 52);
            this.panel6.TabIndex = 3;
            // 
            // txbSearchFoodName
            // 
            this.txbSearchFoodName.Location = new System.Drawing.Point(3, 17);
            this.txbSearchFoodName.Name = "txbSearchFoodName";
            this.txbSearchFoodName.Size = new System.Drawing.Size(199, 20);
            this.txbSearchFoodName.TabIndex = 5;
            // 
            // btnSearchFood
            // 
            this.btnSearchFood.Location = new System.Drawing.Point(208, 3);
            this.btnSearchFood.Name = "btnSearchFood";
            this.btnSearchFood.Size = new System.Drawing.Size(75, 46);
            this.btnSearchFood.TabIndex = 4;
            this.btnSearchFood.Text = "Tìm";
            this.btnSearchFood.UseVisualStyleBackColor = true;
            this.btnSearchFood.Click += new System.EventHandler(this.btnSearchFood_Click);
            // 
            // panel5
            // 
            this.panel5.Controls.Add(this.panel10);
            this.panel5.Controls.Add(this.panel9);
            this.panel5.Controls.Add(this.panel8);
            this.panel5.Controls.Add(this.panel7);
            this.panel5.Location = new System.Drawing.Point(361, 61);
            this.panel5.Name = "panel5";
            this.panel5.Size = new System.Drawing.Size(285, 346);
            this.panel5.TabIndex = 2;
            // 
            // panel10
            // 
            this.panel10.Controls.Add(this.nmFoodPrice);
            this.panel10.Controls.Add(this.label4);
            this.panel10.Location = new System.Drawing.Point(3, 153);
            this.panel10.Name = "panel10";
            this.panel10.Size = new System.Drawing.Size(279, 44);
            this.panel10.TabIndex = 4;
            // 
            // nmFoodPrice
            // 
            this.nmFoodPrice.Location = new System.Drawing.Point(91, 8);
            this.nmFoodPrice.Maximum = new decimal(new int[] {
            100000000,
            0,
            0,
            0});
            this.nmFoodPrice.Name = "nmFoodPrice";
            this.nmFoodPrice.Size = new System.Drawing.Size(185, 20);
            this.nmFoodPrice.TabIndex = 1;
            // 
            // label4
            // 
            this.label4.AutoSize = true;
            this.label4.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label4.Location = new System.Drawing.Point(3, 9);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(40, 19);
            this.label4.TabIndex = 0;
            this.label4.Text = "Giá:";
            // 
            // panel9
            // 
            this.panel9.Controls.Add(this.cbFoodCategory);
            this.panel9.Controls.Add(this.label3);
            this.panel9.Location = new System.Drawing.Point(3, 103);
            this.panel9.Name = "panel9";
            this.panel9.Size = new System.Drawing.Size(279, 44);
            this.panel9.TabIndex = 3;
            // 
            // cbFoodCategory
            // 
            this.cbFoodCategory.FormattingEnabled = true;
            this.cbFoodCategory.Location = new System.Drawing.Point(91, 9);
            this.cbFoodCategory.Name = "cbFoodCategory";
            this.cbFoodCategory.Size = new System.Drawing.Size(185, 21);
            this.cbFoodCategory.TabIndex = 1;
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label3.Location = new System.Drawing.Point(3, 9);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(93, 19);
            this.label3.TabIndex = 0;
            this.label3.Text = "Danh mục:";
            // 
            // panel8
            // 
            this.panel8.Controls.Add(this.txbFoodName);
            this.panel8.Controls.Add(this.label2);
            this.panel8.Location = new System.Drawing.Point(3, 53);
            this.panel8.Name = "panel8";
            this.panel8.Size = new System.Drawing.Size(279, 44);
            this.panel8.TabIndex = 2;
            // 
            // txbFoodName
            // 
            this.txbFoodName.Location = new System.Drawing.Point(91, 8);
            this.txbFoodName.Name = "txbFoodName";
            this.txbFoodName.Size = new System.Drawing.Size(185, 20);
            this.txbFoodName.TabIndex = 1;
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label2.Location = new System.Drawing.Point(3, 9);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(82, 19);
            this.label2.TabIndex = 0;
            this.label2.Text = "Tên món:";
            // 
            // panel7
            // 
            this.panel7.Controls.Add(this.txbFoodID);
            this.panel7.Controls.Add(this.label1);
            this.panel7.Location = new System.Drawing.Point(3, 3);
            this.panel7.Name = "panel7";
            this.panel7.Size = new System.Drawing.Size(279, 44);
            this.panel7.TabIndex = 1;
            // 
            // txbFoodID
            // 
            this.txbFoodID.Location = new System.Drawing.Point(91, 8);
            this.txbFoodID.Name = "txbFoodID";
            this.txbFoodID.ReadOnly = true;
            this.txbFoodID.Size = new System.Drawing.Size(185, 20);
            this.txbFoodID.TabIndex = 1;
            this.txbFoodID.TextChanged += new System.EventHandler(this.txbFoodID_TextChanged);
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label1.Location = new System.Drawing.Point(3, 9);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(31, 19);
            this.label1.TabIndex = 0;
            this.label1.Text = "ID:";
            // 
            // panel4
            // 
            this.panel4.Controls.Add(this.btnShowFood);
            this.panel4.Controls.Add(this.btnEditFood);
            this.panel4.Controls.Add(this.btnDeleteFood);
            this.panel4.Controls.Add(this.btnAddFood);
            this.panel4.Location = new System.Drawing.Point(6, 3);
            this.panel4.Name = "panel4";
            this.panel4.Size = new System.Drawing.Size(349, 52);
            this.panel4.TabIndex = 1;
            // 
            // btnShowFood
            // 
            this.btnShowFood.Location = new System.Drawing.Point(246, 3);
            this.btnShowFood.Name = "btnShowFood";
            this.btnShowFood.Size = new System.Drawing.Size(75, 46);
            this.btnShowFood.TabIndex = 3;
            this.btnShowFood.Text = "Xem";
            this.btnShowFood.UseVisualStyleBackColor = true;
            this.btnShowFood.Click += new System.EventHandler(this.btnShowFood_Click);
            // 
            // btnEditFood
            // 
            this.btnEditFood.Location = new System.Drawing.Point(165, 3);
            this.btnEditFood.Name = "btnEditFood";
            this.btnEditFood.Size = new System.Drawing.Size(75, 46);
            this.btnEditFood.TabIndex = 2;
            this.btnEditFood.Text = "Sửa";
            this.btnEditFood.UseVisualStyleBackColor = true;
            this.btnEditFood.Click += new System.EventHandler(this.btnEditFood_Click);
            // 
            // btnDeleteFood
            // 
            this.btnDeleteFood.Location = new System.Drawing.Point(84, 3);
            this.btnDeleteFood.Name = "btnDeleteFood";
            this.btnDeleteFood.Size = new System.Drawing.Size(75, 46);
            this.btnDeleteFood.TabIndex = 1;
            this.btnDeleteFood.Text = "Xóa";
            this.btnDeleteFood.UseVisualStyleBackColor = true;
            this.btnDeleteFood.Click += new System.EventHandler(this.btnDeleteFood_Click);
            // 
            // btnAddFood
            // 
            this.btnAddFood.Location = new System.Drawing.Point(3, 3);
            this.btnAddFood.Name = "btnAddFood";
            this.btnAddFood.Size = new System.Drawing.Size(75, 46);
            this.btnAddFood.TabIndex = 0;
            this.btnAddFood.Text = "Thêm";
            this.btnAddFood.UseVisualStyleBackColor = true;
            this.btnAddFood.Click += new System.EventHandler(this.btnAddFood_Click);
            // 
            // panel3
            // 
            this.panel3.Controls.Add(this.dtgvFood);
            this.panel3.Location = new System.Drawing.Point(6, 61);
            this.panel3.Name = "panel3";
            this.panel3.Size = new System.Drawing.Size(349, 346);
            this.panel3.TabIndex = 0;
            // 
            // dtgvFood
            // 
            this.dtgvFood.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dtgvFood.Location = new System.Drawing.Point(3, 3);
            this.dtgvFood.Name = "dtgvFood";
            this.dtgvFood.Size = new System.Drawing.Size(343, 340);
            this.dtgvFood.TabIndex = 0;
            // 
            // tbFoodCategory
            // 
            this.tbFoodCategory.Controls.Add(this.panel12);
            this.tbFoodCategory.Controls.Add(this.panel17);
            this.tbFoodCategory.Controls.Add(this.panel18);
            this.tbFoodCategory.Location = new System.Drawing.Point(4, 22);
            this.tbFoodCategory.Name = "tbFoodCategory";
            this.tbFoodCategory.Padding = new System.Windows.Forms.Padding(3);
            this.tbFoodCategory.Size = new System.Drawing.Size(650, 413);
            this.tbFoodCategory.TabIndex = 2;
            this.tbFoodCategory.Text = "Danh mục";
            this.tbFoodCategory.UseVisualStyleBackColor = true;
            // 
            // panel12
            // 
            this.panel12.Controls.Add(this.panel15);
            this.panel12.Controls.Add(this.panel16);
            this.panel12.Location = new System.Drawing.Point(360, 62);
            this.panel12.Name = "panel12";
            this.panel12.Size = new System.Drawing.Size(285, 346);
            this.panel12.TabIndex = 6;
            // 
            // panel15
            // 
            this.panel15.Controls.Add(this.textBox2);
            this.panel15.Controls.Add(this.label7);
            this.panel15.Location = new System.Drawing.Point(3, 53);
            this.panel15.Name = "panel15";
            this.panel15.Size = new System.Drawing.Size(279, 44);
            this.panel15.TabIndex = 2;
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(125, 8);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(151, 20);
            this.textBox2.TabIndex = 1;
            // 
            // label7
            // 
            this.label7.AutoSize = true;
            this.label7.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label7.Location = new System.Drawing.Point(3, 9);
            this.label7.Name = "label7";
            this.label7.Size = new System.Drawing.Size(124, 19);
            this.label7.TabIndex = 0;
            this.label7.Text = "Tên danh mục:";
            // 
            // panel16
            // 
            this.panel16.Controls.Add(this.txbCategoryID);
            this.panel16.Controls.Add(this.label8);
            this.panel16.Location = new System.Drawing.Point(3, 3);
            this.panel16.Name = "panel16";
            this.panel16.Size = new System.Drawing.Size(279, 44);
            this.panel16.TabIndex = 1;
            // 
            // txbCategoryID
            // 
            this.txbCategoryID.Location = new System.Drawing.Point(125, 8);
            this.txbCategoryID.Name = "txbCategoryID";
            this.txbCategoryID.ReadOnly = true;
            this.txbCategoryID.Size = new System.Drawing.Size(151, 20);
            this.txbCategoryID.TabIndex = 1;
            // 
            // label8
            // 
            this.label8.AutoSize = true;
            this.label8.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label8.Location = new System.Drawing.Point(3, 9);
            this.label8.Name = "label8";
            this.label8.Size = new System.Drawing.Size(31, 19);
            this.label8.TabIndex = 0;
            this.label8.Text = "ID:";
            // 
            // panel17
            // 
            this.panel17.Controls.Add(this.btnShowCategory);
            this.panel17.Controls.Add(this.btnEditCategory);
            this.panel17.Controls.Add(this.btnDeleteCategory);
            this.panel17.Controls.Add(this.btnAddCategory);
            this.panel17.Location = new System.Drawing.Point(5, 4);
            this.panel17.Name = "panel17";
            this.panel17.Size = new System.Drawing.Size(349, 52);
            this.panel17.TabIndex = 5;
            // 
            // btnShowCategory
            // 
            this.btnShowCategory.Location = new System.Drawing.Point(246, 3);
            this.btnShowCategory.Name = "btnShowCategory";
            this.btnShowCategory.Size = new System.Drawing.Size(75, 46);
            this.btnShowCategory.TabIndex = 3;
            this.btnShowCategory.Text = "Xem";
            this.btnShowCategory.UseVisualStyleBackColor = true;
            // 
            // btnEditCategory
            // 
            this.btnEditCategory.Location = new System.Drawing.Point(165, 3);
            this.btnEditCategory.Name = "btnEditCategory";
            this.btnEditCategory.Size = new System.Drawing.Size(75, 46);
            this.btnEditCategory.TabIndex = 2;
            this.btnEditCategory.Text = "Sửa";
            this.btnEditCategory.UseVisualStyleBackColor = true;
            // 
            // btnDeleteCategory
            // 
            this.btnDeleteCategory.Location = new System.Drawing.Point(84, 3);
            this.btnDeleteCategory.Name = "btnDeleteCategory";
            this.btnDeleteCategory.Size = new System.Drawing.Size(75, 46);
            this.btnDeleteCategory.TabIndex = 1;
            this.btnDeleteCategory.Text = "Xóa";
            this.btnDeleteCategory.UseVisualStyleBackColor = true;
            // 
            // btnAddCategory
            // 
            this.btnAddCategory.Location = new System.Drawing.Point(3, 3);
            this.btnAddCategory.Name = "btnAddCategory";
            this.btnAddCategory.Size = new System.Drawing.Size(75, 46);
            this.btnAddCategory.TabIndex = 0;
            this.btnAddCategory.Text = "Thêm";
            this.btnAddCategory.UseVisualStyleBackColor = true;
            // 
            // panel18
            // 
            this.panel18.Controls.Add(this.dtgvCategory);
            this.panel18.Location = new System.Drawing.Point(5, 62);
            this.panel18.Name = "panel18";
            this.panel18.Size = new System.Drawing.Size(349, 346);
            this.panel18.TabIndex = 4;
            // 
            // dtgvCategory
            // 
            this.dtgvCategory.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dtgvCategory.Location = new System.Drawing.Point(3, 3);
            this.dtgvCategory.Name = "dtgvCategory";
            this.dtgvCategory.Size = new System.Drawing.Size(343, 340);
            this.dtgvCategory.TabIndex = 0;
            // 
            // tpTable
            // 
            this.tpTable.Controls.Add(this.panel11);
            this.tpTable.Controls.Add(this.panel19);
            this.tpTable.Controls.Add(this.panel20);
            this.tpTable.Location = new System.Drawing.Point(4, 22);
            this.tpTable.Name = "tpTable";
            this.tpTable.Padding = new System.Windows.Forms.Padding(3);
            this.tpTable.Size = new System.Drawing.Size(650, 413);
            this.tpTable.TabIndex = 3;
            this.tpTable.Text = "Bàn ăn";
            this.tpTable.UseVisualStyleBackColor = true;
            // 
            // panel11
            // 
            this.panel11.Controls.Add(this.panel21);
            this.panel11.Controls.Add(this.panel13);
            this.panel11.Controls.Add(this.panel14);
            this.panel11.Location = new System.Drawing.Point(360, 62);
            this.panel11.Name = "panel11";
            this.panel11.Size = new System.Drawing.Size(285, 346);
            this.panel11.TabIndex = 9;
            // 
            // panel21
            // 
            this.panel21.Controls.Add(this.cbTableStatus);
            this.panel21.Controls.Add(this.label9);
            this.panel21.Location = new System.Drawing.Point(3, 103);
            this.panel21.Name = "panel21";
            this.panel21.Size = new System.Drawing.Size(279, 44);
            this.panel21.TabIndex = 3;
            // 
            // cbTableStatus
            // 
            this.cbTableStatus.FormattingEnabled = true;
            this.cbTableStatus.Location = new System.Drawing.Point(125, 9);
            this.cbTableStatus.Name = "cbTableStatus";
            this.cbTableStatus.Size = new System.Drawing.Size(151, 21);
            this.cbTableStatus.TabIndex = 1;
            // 
            // label9
            // 
            this.label9.AutoSize = true;
            this.label9.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label9.Location = new System.Drawing.Point(3, 9);
            this.label9.Name = "label9";
            this.label9.Size = new System.Drawing.Size(91, 19);
            this.label9.TabIndex = 0;
            this.label9.Text = "Trạng thái:";
            // 
            // panel13
            // 
            this.panel13.Controls.Add(this.txbTableName);
            this.panel13.Controls.Add(this.label5);
            this.panel13.Location = new System.Drawing.Point(3, 53);
            this.panel13.Name = "panel13";
            this.panel13.Size = new System.Drawing.Size(279, 44);
            this.panel13.TabIndex = 2;
            // 
            // txbTableName
            // 
            this.txbTableName.Location = new System.Drawing.Point(125, 8);
            this.txbTableName.Name = "txbTableName";
            this.txbTableName.Size = new System.Drawing.Size(151, 20);
            this.txbTableName.TabIndex = 1;
            // 
            // label5
            // 
            this.label5.AutoSize = true;
            this.label5.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label5.Location = new System.Drawing.Point(3, 9);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(77, 19);
            this.label5.TabIndex = 0;
            this.label5.Text = "Tên bàn:";
            // 
            // panel14
            // 
            this.panel14.Controls.Add(this.textBox3);
            this.panel14.Controls.Add(this.label6);
            this.panel14.Location = new System.Drawing.Point(3, 3);
            this.panel14.Name = "panel14";
            this.panel14.Size = new System.Drawing.Size(279, 44);
            this.panel14.TabIndex = 1;
            // 
            // textBox3
            // 
            this.textBox3.Location = new System.Drawing.Point(125, 8);
            this.textBox3.Name = "textBox3";
            this.textBox3.ReadOnly = true;
            this.textBox3.Size = new System.Drawing.Size(151, 20);
            this.textBox3.TabIndex = 1;
            // 
            // label6
            // 
            this.label6.AutoSize = true;
            this.label6.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label6.Location = new System.Drawing.Point(3, 9);
            this.label6.Name = "label6";
            this.label6.Size = new System.Drawing.Size(31, 19);
            this.label6.TabIndex = 0;
            this.label6.Text = "ID:";
            // 
            // panel19
            // 
            this.panel19.Controls.Add(this.btnShowTable);
            this.panel19.Controls.Add(this.btnEditTable);
            this.panel19.Controls.Add(this.btnDeleteTable);
            this.panel19.Controls.Add(this.btnAddTable);
            this.panel19.Location = new System.Drawing.Point(5, 4);
            this.panel19.Name = "panel19";
            this.panel19.Size = new System.Drawing.Size(349, 52);
            this.panel19.TabIndex = 8;
            // 
            // btnShowTable
            // 
            this.btnShowTable.Location = new System.Drawing.Point(246, 3);
            this.btnShowTable.Name = "btnShowTable";
            this.btnShowTable.Size = new System.Drawing.Size(75, 46);
            this.btnShowTable.TabIndex = 3;
            this.btnShowTable.Text = "Xem";
            this.btnShowTable.UseVisualStyleBackColor = true;
            // 
            // btnEditTable
            // 
            this.btnEditTable.Location = new System.Drawing.Point(165, 3);
            this.btnEditTable.Name = "btnEditTable";
            this.btnEditTable.Size = new System.Drawing.Size(75, 46);
            this.btnEditTable.TabIndex = 2;
            this.btnEditTable.Text = "Sửa";
            this.btnEditTable.UseVisualStyleBackColor = true;
            // 
            // btnDeleteTable
            // 
            this.btnDeleteTable.Location = new System.Drawing.Point(84, 3);
            this.btnDeleteTable.Name = "btnDeleteTable";
            this.btnDeleteTable.Size = new System.Drawing.Size(75, 46);
            this.btnDeleteTable.TabIndex = 1;
            this.btnDeleteTable.Text = "Xóa";
            this.btnDeleteTable.UseVisualStyleBackColor = true;
            // 
            // btnAddTable
            // 
            this.btnAddTable.Location = new System.Drawing.Point(3, 3);
            this.btnAddTable.Name = "btnAddTable";
            this.btnAddTable.Size = new System.Drawing.Size(75, 46);
            this.btnAddTable.TabIndex = 0;
            this.btnAddTable.Text = "Thêm";
            this.btnAddTable.UseVisualStyleBackColor = true;
            // 
            // panel20
            // 
            this.panel20.Controls.Add(this.dtgvTable);
            this.panel20.Location = new System.Drawing.Point(5, 62);
            this.panel20.Name = "panel20";
            this.panel20.Size = new System.Drawing.Size(349, 346);
            this.panel20.TabIndex = 7;
            // 
            // dtgvTable
            // 
            this.dtgvTable.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dtgvTable.Location = new System.Drawing.Point(3, 3);
            this.dtgvTable.Name = "dtgvTable";
            this.dtgvTable.Size = new System.Drawing.Size(343, 340);
            this.dtgvTable.TabIndex = 0;
            // 
            // tpAccount
            // 
            this.tpAccount.Controls.Add(this.panel23);
            this.tpAccount.Controls.Add(this.panel28);
            this.tpAccount.Controls.Add(this.panel29);
            this.tpAccount.Location = new System.Drawing.Point(4, 22);
            this.tpAccount.Name = "tpAccount";
            this.tpAccount.Padding = new System.Windows.Forms.Padding(3);
            this.tpAccount.Size = new System.Drawing.Size(650, 413);
            this.tpAccount.TabIndex = 4;
            this.tpAccount.Text = "Tài khoản";
            this.tpAccount.UseVisualStyleBackColor = true;
            // 
            // panel23
            // 
            this.panel23.Controls.Add(this.btnResetPassword);
            this.panel23.Controls.Add(this.panel25);
            this.panel23.Controls.Add(this.panel26);
            this.panel23.Controls.Add(this.panel27);
            this.panel23.Location = new System.Drawing.Point(360, 62);
            this.panel23.Name = "panel23";
            this.panel23.Size = new System.Drawing.Size(285, 346);
            this.panel23.TabIndex = 6;
            // 
            // btnResetPassword
            // 
            this.btnResetPassword.Location = new System.Drawing.Point(204, 153);
            this.btnResetPassword.Name = "btnResetPassword";
            this.btnResetPassword.Size = new System.Drawing.Size(75, 46);
            this.btnResetPassword.TabIndex = 4;
            this.btnResetPassword.Text = "Đặt lại mật khẩu";
            this.btnResetPassword.UseVisualStyleBackColor = true;
            // 
            // panel25
            // 
            this.panel25.Controls.Add(this.cbAccountType);
            this.panel25.Controls.Add(this.label11);
            this.panel25.Location = new System.Drawing.Point(3, 103);
            this.panel25.Name = "panel25";
            this.panel25.Size = new System.Drawing.Size(279, 44);
            this.panel25.TabIndex = 3;
            // 
            // cbAccountType
            // 
            this.cbAccountType.FormattingEnabled = true;
            this.cbAccountType.Location = new System.Drawing.Point(127, 9);
            this.cbAccountType.Name = "cbAccountType";
            this.cbAccountType.Size = new System.Drawing.Size(149, 21);
            this.cbAccountType.TabIndex = 1;
            // 
            // label11
            // 
            this.label11.AutoSize = true;
            this.label11.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label11.Location = new System.Drawing.Point(3, 9);
            this.label11.Name = "label11";
            this.label11.Size = new System.Drawing.Size(116, 19);
            this.label11.TabIndex = 0;
            this.label11.Text = "Loại tài khoản";
            // 
            // panel26
            // 
            this.panel26.Controls.Add(this.txbDisplayName);
            this.panel26.Controls.Add(this.label12);
            this.panel26.Location = new System.Drawing.Point(3, 53);
            this.panel26.Name = "panel26";
            this.panel26.Size = new System.Drawing.Size(279, 44);
            this.panel26.TabIndex = 2;
            // 
            // txbDisplayName
            // 
            this.txbDisplayName.Location = new System.Drawing.Point(127, 8);
            this.txbDisplayName.Name = "txbDisplayName";
            this.txbDisplayName.Size = new System.Drawing.Size(149, 20);
            this.txbDisplayName.TabIndex = 1;
            // 
            // label12
            // 
            this.label12.AutoSize = true;
            this.label12.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label12.Location = new System.Drawing.Point(3, 9);
            this.label12.Name = "label12";
            this.label12.Size = new System.Drawing.Size(104, 19);
            this.label12.TabIndex = 0;
            this.label12.Text = "Tên hiển thị:";
            // 
            // panel27
            // 
            this.panel27.Controls.Add(this.txbUserName);
            this.panel27.Controls.Add(this.label13);
            this.panel27.Location = new System.Drawing.Point(3, 3);
            this.panel27.Name = "panel27";
            this.panel27.Size = new System.Drawing.Size(279, 44);
            this.panel27.TabIndex = 1;
            // 
            // txbUserName
            // 
            this.txbUserName.Location = new System.Drawing.Point(127, 8);
            this.txbUserName.Name = "txbUserName";
            this.txbUserName.ReadOnly = true;
            this.txbUserName.Size = new System.Drawing.Size(149, 20);
            this.txbUserName.TabIndex = 1;
            // 
            // label13
            // 
            this.label13.AutoSize = true;
            this.label13.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.label13.Location = new System.Drawing.Point(3, 9);
            this.label13.Name = "label13";
            this.label13.Size = new System.Drawing.Size(118, 19);
            this.label13.TabIndex = 0;
            this.label13.Text = "Tên tài khoản:";
            // 
            // panel28
            // 
            this.panel28.Controls.Add(this.btnShowAccount);
            this.panel28.Controls.Add(this.btnEditAccount);
            this.panel28.Controls.Add(this.btnDeleteAccount);
            this.panel28.Controls.Add(this.btnAddAccount);
            this.panel28.Location = new System.Drawing.Point(5, 4);
            this.panel28.Name = "panel28";
            this.panel28.Size = new System.Drawing.Size(349, 52);
            this.panel28.TabIndex = 5;
            // 
            // btnShowAccount
            // 
            this.btnShowAccount.Location = new System.Drawing.Point(246, 3);
            this.btnShowAccount.Name = "btnShowAccount";
            this.btnShowAccount.Size = new System.Drawing.Size(75, 46);
            this.btnShowAccount.TabIndex = 3;
            this.btnShowAccount.Text = "Xem";
            this.btnShowAccount.UseVisualStyleBackColor = true;
            // 
            // btnEditAccount
            // 
            this.btnEditAccount.Location = new System.Drawing.Point(165, 3);
            this.btnEditAccount.Name = "btnEditAccount";
            this.btnEditAccount.Size = new System.Drawing.Size(75, 46);
            this.btnEditAccount.TabIndex = 2;
            this.btnEditAccount.Text = "Sửa";
            this.btnEditAccount.UseVisualStyleBackColor = true;
            // 
            // btnDeleteAccount
            // 
            this.btnDeleteAccount.Location = new System.Drawing.Point(84, 3);
            this.btnDeleteAccount.Name = "btnDeleteAccount";
            this.btnDeleteAccount.Size = new System.Drawing.Size(75, 46);
            this.btnDeleteAccount.TabIndex = 1;
            this.btnDeleteAccount.Text = "Xóa";
            this.btnDeleteAccount.UseVisualStyleBackColor = true;
            // 
            // btnAddAccount
            // 
            this.btnAddAccount.Location = new System.Drawing.Point(3, 3);
            this.btnAddAccount.Name = "btnAddAccount";
            this.btnAddAccount.Size = new System.Drawing.Size(75, 46);
            this.btnAddAccount.TabIndex = 0;
            this.btnAddAccount.Text = "Thêm";
            this.btnAddAccount.UseVisualStyleBackColor = true;
            // 
            // panel29
            // 
            this.panel29.Controls.Add(this.dtgvAccount);
            this.panel29.Location = new System.Drawing.Point(5, 62);
            this.panel29.Name = "panel29";
            this.panel29.Size = new System.Drawing.Size(349, 346);
            this.panel29.TabIndex = 4;
            // 
            // dtgvAccount
            // 
            this.dtgvAccount.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dtgvAccount.Location = new System.Drawing.Point(3, 3);
            this.dtgvAccount.Name = "dtgvAccount";
            this.dtgvAccount.Size = new System.Drawing.Size(343, 340);
            this.dtgvAccount.TabIndex = 0;
            // 
            // fAdmin
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(674, 463);
            this.Controls.Add(this.tcAdmin);
            this.Name = "fAdmin";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Admin";
            this.tcAdmin.ResumeLayout(false);
            this.tpBill.ResumeLayout(false);
            this.panel2.ResumeLayout(false);
            this.panel1.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.dtgvBill)).EndInit();
            this.tpFood.ResumeLayout(false);
            this.panel6.ResumeLayout(false);
            this.panel6.PerformLayout();
            this.panel5.ResumeLayout(false);
            this.panel10.ResumeLayout(false);
            this.panel10.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmFoodPrice)).EndInit();
            this.panel9.ResumeLayout(false);
            this.panel9.PerformLayout();
            this.panel8.ResumeLayout(false);
            this.panel8.PerformLayout();
            this.panel7.ResumeLayout(false);
            this.panel7.PerformLayout();
            this.panel4.ResumeLayout(false);
            this.panel3.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.dtgvFood)).EndInit();
            this.tbFoodCategory.ResumeLayout(false);
            this.panel12.ResumeLayout(false);
            this.panel15.ResumeLayout(false);
            this.panel15.PerformLayout();
            this.panel16.ResumeLayout(false);
            this.panel16.PerformLayout();
            this.panel17.ResumeLayout(false);
            this.panel18.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.dtgvCategory)).EndInit();
            this.tpTable.ResumeLayout(false);
            this.panel11.ResumeLayout(false);
            this.panel21.ResumeLayout(false);
            this.panel21.PerformLayout();
            this.panel13.ResumeLayout(false);
            this.panel13.PerformLayout();
            this.panel14.ResumeLayout(false);
            this.panel14.PerformLayout();
            this.panel19.ResumeLayout(false);
            this.panel20.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.dtgvTable)).EndInit();
            this.tpAccount.ResumeLayout(false);
            this.panel23.ResumeLayout(false);
            this.panel25.ResumeLayout(false);
            this.panel25.PerformLayout();
            this.panel26.ResumeLayout(false);
            this.panel26.PerformLayout();
            this.panel27.ResumeLayout(false);
            this.panel27.PerformLayout();
            this.panel28.ResumeLayout(false);
            this.panel29.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.dtgvAccount)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.TabControl tcAdmin;
        private System.Windows.Forms.TabPage tpBill;
        private System.Windows.Forms.Panel panel2;
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.DataGridView dtgvBill;
        private System.Windows.Forms.TabPage tpFood;
        private System.Windows.Forms.TabPage tbFoodCategory;
        private System.Windows.Forms.TabPage tpTable;
        private System.Windows.Forms.TabPage tpAccount;
        private System.Windows.Forms.Button btnViewBill;
        private System.Windows.Forms.DateTimePicker dtpkToDate;
        private System.Windows.Forms.DateTimePicker dtpkFromDate;
        private System.Windows.Forms.Panel panel6;
        private System.Windows.Forms.TextBox txbSearchFoodName;
        private System.Windows.Forms.Button btnSearchFood;
        private System.Windows.Forms.Panel panel5;
        private System.Windows.Forms.Panel panel4;
        private System.Windows.Forms.Button btnShowFood;
        private System.Windows.Forms.Button btnEditFood;
        private System.Windows.Forms.Button btnDeleteFood;
        private System.Windows.Forms.Button btnAddFood;
        private System.Windows.Forms.Panel panel3;
        private System.Windows.Forms.DataGridView dtgvFood;
        private System.Windows.Forms.Panel panel8;
        private System.Windows.Forms.TextBox txbFoodName;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Panel panel7;
        private System.Windows.Forms.TextBox txbFoodID;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Panel panel10;
        private System.Windows.Forms.NumericUpDown nmFoodPrice;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.Panel panel9;
        private System.Windows.Forms.ComboBox cbFoodCategory;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Panel panel12;
        private System.Windows.Forms.Panel panel15;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Label label7;
        private System.Windows.Forms.Panel panel16;
        private System.Windows.Forms.TextBox txbCategoryID;
        private System.Windows.Forms.Label label8;
        private System.Windows.Forms.Panel panel17;
        private System.Windows.Forms.Button btnShowCategory;
        private System.Windows.Forms.Button btnEditCategory;
        private System.Windows.Forms.Button btnDeleteCategory;
        private System.Windows.Forms.Button btnAddCategory;
        private System.Windows.Forms.Panel panel18;
        private System.Windows.Forms.DataGridView dtgvCategory;
        private System.Windows.Forms.Panel panel11;
        private System.Windows.Forms.Panel panel21;
        private System.Windows.Forms.ComboBox cbTableStatus;
        private System.Windows.Forms.Label label9;
        private System.Windows.Forms.Panel panel13;
        private System.Windows.Forms.TextBox txbTableName;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.Panel panel14;
        private System.Windows.Forms.TextBox textBox3;
        private System.Windows.Forms.Label label6;
        private System.Windows.Forms.Panel panel19;
        private System.Windows.Forms.Button btnShowTable;
        private System.Windows.Forms.Button btnEditTable;
        private System.Windows.Forms.Button btnDeleteTable;
        private System.Windows.Forms.Button btnAddTable;
        private System.Windows.Forms.Panel panel20;
        private System.Windows.Forms.DataGridView dtgvTable;
        private System.Windows.Forms.Panel panel23;
        private System.Windows.Forms.Button btnResetPassword;
        private System.Windows.Forms.Panel panel25;
        private System.Windows.Forms.ComboBox cbAccountType;
        private System.Windows.Forms.Label label11;
        private System.Windows.Forms.Panel panel26;
        private System.Windows.Forms.TextBox txbDisplayName;
        private System.Windows.Forms.Label label12;
        private System.Windows.Forms.Panel panel27;
        private System.Windows.Forms.TextBox txbUserName;
        private System.Windows.Forms.Label label13;
        private System.Windows.Forms.Panel panel28;
        private System.Windows.Forms.Button btnShowAccount;
        private System.Windows.Forms.Button btnEditAccount;
        private System.Windows.Forms.Button btnDeleteAccount;
        private System.Windows.Forms.Button btnAddAccount;
        private System.Windows.Forms.Panel panel29;
        private System.Windows.Forms.DataGridView dtgvAccount;
    }
}

Code fAdmin.cs

using QuanLyQuanCafe.DAO;
using QuanLyQuanCafe.DTO;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace QuanLyQuanCafe
{
    public partial class fAdmin : Form
    {
        BindingSource foodList = new BindingSource();
        public fAdmin()
        {
            InitializeComponent();
            Load();
        }

        #region methods

        List<Food> SearchFoodByName(string name)
        {
            List<Food> listFood = FoodDAO.Instance.SearchFoodByName(name);

            return listFood;
        }
        void Load()
        {
            dtgvFood.DataSource = foodList;

            LoadDateTimePickerBill();
            LoadListBillByDate(dtpkFromDate.Value, dtpkToDate.Value);
            LoadListFood();
            LoadCategoryIntoCombobox(cbFoodCategory);
            AddFoodBinding();
        }
        void LoadDateTimePickerBill()
        {
            DateTime today = DateTime.Now;
            dtpkFromDate.Value = new DateTime(today.Year, today.Month, 1);
            dtpkToDate.Value = dtpkFromDate.Value.AddMonths(1).AddDays(-1);
        }
        void LoadListBillByDate(DateTime checkIn, DateTime checkOut)
        {
            dtgvBill.DataSource = BillDAO.Instance.GetBillListByDate(checkIn, checkOut);
        }

        void AddFoodBinding()
        {
            txbFoodName.DataBindings.Add(new Binding("Text", dtgvFood.DataSource, "Name", true, DataSourceUpdateMode.Never));
            txbFoodID.DataBindings.Add(new Binding("Text", dtgvFood.DataSource, "ID", true, DataSourceUpdateMode.Never));
            nmFoodPrice.DataBindings.Add(new Binding("Value", dtgvFood.DataSource, "Price", true, DataSourceUpdateMode.Never));
        }

        void LoadCategoryIntoCombobox(ComboBox cb)
        {
            cb.DataSource = CategoryDAO.Instance.GetListCategory();
            cb.DisplayMember = "Name";
        }
        void LoadListFood()
        {
            foodList.DataSource = FoodDAO.Instance.GetListFood();
        }
        #endregion

        #region events
        private void btnSearchFood_Click(object sender, EventArgs e)
        {
            foodList.DataSource = SearchFoodByName(txbSearchFoodName.Text);
        }
        private void txbFoodID_TextChanged(object sender, EventArgs e)
        {
            try
            {
                if (dtgvFood.SelectedCells.Count > 0)
                {
                    int id = (int)dtgvFood.SelectedCells[0].OwningRow.Cells["CategoryID"].Value;

                    Category cateogory = CategoryDAO.Instance.GetCategoryByID(id);

                    cbFoodCategory.SelectedItem = cateogory;

                    int index = -1;
                    int i = 0;
                    foreach (Category item in cbFoodCategory.Items)
                    {
                        if (item.ID == cateogory.ID)
                        {
                            index = i;
                            break;
                        }
                        i++;
                    }

                    cbFoodCategory.SelectedIndex = index;
                }
            }
            catch { }
        }

        private void btnAddFood_Click(object sender, EventArgs e)
        {
            string name = txbFoodName.Text;
            int categoryID = (cbFoodCategory.SelectedItem as Category).ID;
            float price = (float)nmFoodPrice.Value;

            if (FoodDAO.Instance.InsertFood(name, categoryID, price))
            {
                MessageBox.Show("Thêm món thành công");
                LoadListFood();
                if (insertFood != null)
                    insertFood(this, new EventArgs());
            }
            else
            {
                MessageBox.Show("Có lỗi khi thêm thức ăn");
            }
        }

        private void btnEditFood_Click(object sender, EventArgs e)
        {
            string name = txbFoodName.Text;
            int categoryID = (cbFoodCategory.SelectedItem as Category).ID;
            float price = (float)nmFoodPrice.Value;
            int id = Convert.ToInt32(txbFoodID.Text);

            if (FoodDAO.Instance.UpdateFood(id, name, categoryID, price))
            {
                MessageBox.Show("Sửa món thành công");
                LoadListFood();
                if (updateFood != null)
                    updateFood(this, new EventArgs());
            }
            else
            {
                MessageBox.Show("Có lỗi khi sửa thức ăn");
            }
        }

        private void btnDeleteFood_Click(object sender, EventArgs e)
        {
            int id = Convert.ToInt32(txbFoodID.Text);

            if (FoodDAO.Instance.DeleteFood(id))
            {
                MessageBox.Show("Xóa món thành công");
                LoadListFood();
                if (deleteFood != null)
                    deleteFood(this, new EventArgs());
            }
            else
            {
                MessageBox.Show("Có lỗi khi xóa thức ăn");
            }
        }
        private void btnShowFood_Click(object sender, EventArgs e)
        {
            LoadListFood();
        }
       
        private void btnViewBill_Click(object sender, EventArgs e)
        {
            LoadListBillByDate(dtpkFromDate.Value, dtpkToDate.Value);
        }

        private event EventHandler insertFood;
        public event EventHandler InsertFood
        {
            add { insertFood += value; }
            remove { insertFood -= value; }
        }

        private event EventHandler deleteFood;
        public event EventHandler DeleteFood
        {
            add { deleteFood += value; }
            remove { deleteFood -= value; }
        }

        private event EventHandler updateFood;
        public event EventHandler UpdateFood
        {
            add { updateFood += value; }
            remove { updateFood -= value; }
        }

        #endregion              

        
    }
}

Bài sau chúng ta sẽ cùng nhau tìm hiểu cách hiển thị danh sách thức ăn.

Đừng quên: “Luyện tập – Thử thách – Không ngại khó”

---

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