Thêm, xóa, sửa tài khoản 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 AccountDAO.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 AccountDAO
    {
        private static AccountDAO instance;

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

        private AccountDAO() { }

        public bool Login(string userName, string passWord)
        {
            string query = "USP_Login @userName , @passWord";

            DataTable result = DataProvider.Instance.ExecuteQuery(query, new object[]{userName, passWord});
            
            return result.Rows.Count > 0;
        }

        public bool UpdateAccount(string userName, string displayName, string pass, string newPass)
        {
            int result = DataProvider.Instance.ExecuteNonQuery("exec USP_UpdateAccount @userName , @displayName , @password , @newPassword", new object[]{userName, displayName, pass, newPass});

            return result > 0;
        }

        public DataTable GetListAccount()
        {
            return DataProvider.Instance.ExecuteQuery("SELECT UserName, DisplayName, Type FROM dbo.Account");
        }

        public Account GetAccountByUserName(string userName)
        {
            DataTable data = DataProvider.Instance.ExecuteQuery("Select * from account where userName = '" + userName + "'");

            foreach (DataRow item in data.Rows)
            {
                return new Account(item);
            }

            return null;
        }

        public bool InsertAccount(string name, string displayName, int type)
        {
            string query = string.Format("INSERT dbo.Account ( UserName, DisplayName, Type )VALUES  ( N'{0}', N'{1}', {2})", name, displayName, type);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }

        public bool UpdateAccount(string name, string displayName, int type)
        {
            string query = string.Format("UPDATE dbo.Account SET DisplayName = N'{1}', Type = {2} WHERE UserName = N'{0}'", name, displayName, type);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }

        public bool DeleteAccount(string name)
        {
            string query = string.Format("Delete Account where UserName = N'{0}'", name);
            int result = DataProvider.Instance.ExecuteNonQuery(query);

            return result > 0;
        }

        public bool ResetPassword(string name)
        {
            string query = string.Format("update account set password = N'0' where UserName = N'{0}'", name);
            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.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.numericUpDown1 = new System.Windows.Forms.NumericUpDown();
            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();
            ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).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;
            this.btnResetPassword.Click += new System.EventHandler(this.btnResetPassword_Click);
            // 
            // panel25
            // 
            this.panel25.Controls.Add(this.numericUpDown1);
            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;
            // 
            // 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.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;
            this.btnShowAccount.Click += new System.EventHandler(this.btnShowAccount_Click);
            // 
            // 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;
            this.btnEditAccount.Click += new System.EventHandler(this.btnEditAccount_Click);
            // 
            // 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;
            this.btnDeleteAccount.Click += new System.EventHandler(this.btnDeleteAccount_Click);
            // 
            // 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;
            this.btnAddAccount.Click += new System.EventHandler(this.btnAddAccount_Click);
            // 
            // 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;
            // 
            // numericUpDown1
            // 
            this.numericUpDown1.Location = new System.Drawing.Point(127, 8);
            this.numericUpDown1.Maximum = new decimal(new int[] {
            1,
            0,
            0,
            0});
            this.numericUpDown1.Name = "numericUpDown1";
            this.numericUpDown1.Size = new System.Drawing.Size(33, 20);
            this.numericUpDown1.TabIndex = 1;
            // 
            // 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();
            ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).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.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;
        private System.Windows.Forms.NumericUpDown numericUpDown1;
    }
}

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.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        BindingSource accountList = new BindingSource();

        public Account loginAccount;
        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;
            dtgvAccount.DataSource = accountList;

            LoadDateTimePickerBill();
            LoadListBillByDate(dtpkFromDate.Value, dtpkToDate.Value);
            LoadListFood();
            LoadAccount();
            LoadCategoryIntoCombobox(cbFoodCategory);
            AddFoodBinding();
            AddAccountBinding();
        }

        void AddAccountBinding()
        {
            txbUserName.DataBindings.Add(new Binding("Text", dtgvAccount.DataSource, "UserName", true, DataSourceUpdateMode.Never));
            txbDisplayName.DataBindings.Add(new Binding("Text", dtgvAccount.DataSource, "DisplayName", true, DataSourceUpdateMode.Never));
            numericUpDown1.DataBindings.Add(new Binding("Value", dtgvAccount.DataSource, "Type", true, DataSourceUpdateMode.Never));
        }

        void LoadAccount()
        {
            accountList.DataSource = AccountDAO.Instance.GetListAccount();
        }
        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();
        }

        void AddAccount(string userName, string displayName, int type)
        {
            if (AccountDAO.Instance.InsertAccount(userName, displayName, type))
            {
                MessageBox.Show("Thêm tài khoản thành công");
            }
            else
            {
                MessageBox.Show("Thêm tài khoản thất bại");
            }

            LoadAccount();
        }

        void EditAccount(string userName, string displayName, int type)
        {
            if (AccountDAO.Instance.UpdateAccount(userName, displayName, type))
            {
                MessageBox.Show("Cập nhật tài khoản thành công");
            }
            else
            {
                MessageBox.Show("Cập nhật tài khoản thất bại");
            }

            LoadAccount();
        }

        void DeleteAccount(string userName)
        {
            if (loginAccount.UserName.Equals(userName))
            {
                MessageBox.Show("Vui lòng đừng xóa chính bạn chứ");
                return;
            }
            if (AccountDAO.Instance.DeleteAccount(userName))
            {
                MessageBox.Show("Xóa tài khoản thành công");
            }
            else
            {
                MessageBox.Show("Xóa tài khoản thất bại");
            }

            LoadAccount();
        }

        void ResetPass(string userName)
        {
            if (AccountDAO.Instance.ResetPassword(userName))
            {
                MessageBox.Show("Đặt lại mật khẩu thành công");
            }
            else
            {
                MessageBox.Show("Đặt lại mật khẩu thất bại");
            }
        }
        #endregion

        #region events
        private void btnAddAccount_Click(object sender, EventArgs e)
        {
            string userName = txbUserName.Text;
            string displayName = txbDisplayName.Text;
            int type = (int)numericUpDown1.Value;

            AddAccount(userName, displayName, type);
        }

        private void btnDeleteAccount_Click(object sender, EventArgs e)
        {
            string userName = txbUserName.Text;

            DeleteAccount(userName);
        }

        private void btnEditAccount_Click(object sender, EventArgs e)
        {
            string userName = txbUserName.Text;
            string displayName = txbDisplayName.Text;
            int type = (int)numericUpDown1.Value;

            EditAccount(userName, displayName, type);
        }


        private void btnResetPassword_Click(object sender, EventArgs e)
        {
            string userName = txbUserName.Text;

            ResetPass(userName);
        }


        private void btnShowAccount_Click(object sender, EventArgs e)
        {
            LoadAccount();
        }

        
        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              

        
    }
}

Code fTableManager.cs

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

namespace QuanLyQuanCafe
{
    public partial class fTableManager : Form
    {
        private Account loginAccount;

        public Account LoginAccount
        {
            get { return loginAccount; }
            set { loginAccount = value; ChangeAccount(loginAccount.Type); }
        }
        public fTableManager(Account acc)
        {
            InitializeComponent();

            this.LoginAccount = acc;

            LoadTable();
            LoadCategory();
            LoadComboboxTable(cbSwitchTable);
        }

        #region Method

        void ChangeAccount(int type)
        {
            adminToolStripMenuItem.Enabled = type == 1;
            thôngTinTàiKhoảnToolStripMenuItem.Text += " (" + LoginAccount.DisplayName + ")";
        }
        void LoadCategory()
        {
            List<Category> listCategory = CategoryDAO.Instance.GetListCategory();
            cbCategory.DataSource = listCategory;
            cbCategory.DisplayMember = "Name";
        }

        void LoadFoodListByCategoryID(int id)
        {
            List<Food> listFood = FoodDAO.Instance.GetFoodByCategoryID(id);
            cbFood.DataSource = listFood;
            cbFood.DisplayMember = "Name";
        }
        void LoadTable()
        {
            flpTable.Controls.Clear();
            
            List<Table> tableList = TableDAO.Instance.LoadTableList();

            foreach (Table item in tableList)
            {
                Button btn = new Button() { Width = TableDAO.TableWidth, Height = TableDAO.TableHeight};
                btn.Text = item.Name + Environment.NewLine + item.Status;
                btn.Click += btn_Click;
                btn.Tag = item;

                switch (item.Status)
                {
                    case "Trống":
                        btn.BackColor = Color.Aqua;
                        break;
                    default:
                        btn.BackColor = Color.LightPink;
                        break;
                }

                flpTable.Controls.Add(btn);
            }
        }

        void ShowBill(int id)
        {
            lsvBill.Items.Clear();
            List<QuanLyQuanCafe.DTO.Menu> listBillInfo = MenuDAO.Instance.GetListMenuByTable(id);
            float totalPrice = 0;
            foreach (QuanLyQuanCafe.DTO.Menu item in listBillInfo)
            {
                ListViewItem lsvItem = new ListViewItem(item.FoodName.ToString());
                lsvItem.SubItems.Add(item.Count.ToString());
                lsvItem.SubItems.Add(item.Price.ToString());
                lsvItem.SubItems.Add(item.TotalPrice.ToString());
                totalPrice += item.TotalPrice;
                lsvBill.Items.Add(lsvItem);
            }
            CultureInfo culture = new CultureInfo("vi-VN");

            //Thread.CurrentThread.CurrentCulture = culture;

            txbTotalPrice.Text = totalPrice.ToString("c", culture);

        }

        void LoadComboboxTable(ComboBox cb)
        {
            cb.DataSource = TableDAO.Instance.LoadTableList();
            cb.DisplayMember = "Name";
        }

        #endregion


        #region Events
        void btn_Click(object sender, EventArgs e)
        {
            int tableID = ((sender as Button).Tag as Table).ID;
            lsvBill.Tag = (sender as Button).Tag;
            ShowBill(tableID);
        }
        private void đăngXuấtToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void thôngTinCáNhânToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fAccountProfile f = new fAccountProfile(LoginAccount);
            f.UpdateAccount += f_UpdateAccount;
            f.ShowDialog();
        }

        void f_UpdateAccount(object sender, AccountEvent e)
        {
            thôngTinTàiKhoảnToolStripMenuItem.Text = "Thông tin tài khoản (" + e.Acc.DisplayName + ")";
        }

        private void adminToolStripMenuItem_Click(object sender, EventArgs e)
        {
            fAdmin f = new fAdmin();
            f.loginAccount = LoginAccount;
            f.InsertFood += f_InsertFood;
            f.DeleteFood += f_DeleteFood;
            f.UpdateFood += f_UpdateFood;
            f.ShowDialog();
        }

        void f_UpdateFood(object sender, EventArgs e)
        {
            LoadFoodListByCategoryID((cbCategory.SelectedItem as Category).ID);
            if (lsvBill.Tag != null)
                ShowBill((lsvBill.Tag as Table).ID);
        }

        void f_DeleteFood(object sender, EventArgs e)
        {
            LoadFoodListByCategoryID((cbCategory.SelectedItem as Category).ID);
            if (lsvBill.Tag != null)
                ShowBill((lsvBill.Tag as Table).ID);
            LoadTable();
        }

        void f_InsertFood(object sender, EventArgs e)
        {
            LoadFoodListByCategoryID((cbCategory.SelectedItem as Category).ID);
            if (lsvBill.Tag != null)
                ShowBill((lsvBill.Tag as Table).ID);
        }

        private void cbCategory_SelectedIndexChanged(object sender, EventArgs e)
        {
            int id = 0;

            ComboBox cb = sender as ComboBox;

            if (cb.SelectedItem == null)
                return;

            Category selected = cb.SelectedItem as Category;
            id = selected.ID;

            LoadFoodListByCategoryID(id);
        }

        private void btnAddFood_Click(object sender, EventArgs e)
        {
            Table table = lsvBill.Tag as Table;

            if (table == null)
            {
                MessageBox.Show("Hãy chọn bàn");
                return;
            }

            int idBill = BillDAO.Instance.GetUncheckBillIDByTableID(table.ID);
            int foodID = (cbFood.SelectedItem as Food).ID;
            int count = (int)nmFoodCount.Value;

            if (idBill == -1)
            {
                BillDAO.Instance.InsertBill(table.ID);
                BillInfoDAO.Instance.InsertBillInfo(BillDAO.Instance.GetMaxIDBill(), foodID , count);
            }
            else
            {
                BillInfoDAO.Instance.InsertBillInfo(idBill, foodID, count);
            }

            ShowBill(table.ID);

            LoadTable();
        }        
        private void btnCheckOut_Click(object sender, EventArgs e)
        {
            Table table = lsvBill.Tag as Table;

            int idBill = BillDAO.Instance.GetUncheckBillIDByTableID(table.ID);
            int discount = (int)nmDisCount.Value;

            double totalPrice = Convert.ToDouble(txbTotalPrice.Text.Split(',')[0]);
            double finalTotalPrice = totalPrice - (totalPrice/100)*discount;

            if (idBill != -1)
            {
                if (MessageBox.Show(string.Format("Bạn có chắc thanh toán hóa đơn cho bàn {0}\nTổng tiền - (Tổng tiền / 100) x Giảm giá\n=> {1} - ({1} / 100) x {2} = {3}",table.Name, totalPrice, discount, finalTotalPrice), "Thông báo", MessageBoxButtons.OKCancel) == System.Windows.Forms.DialogResult.OK)
                {
                    BillDAO.Instance.CheckOut(idBill, discount, (float)finalTotalPrice);
                    ShowBill(table.ID);

                    LoadTable();
                }
            }
        }
        private void btnSwitchTable_Click(object sender, EventArgs e)
        {           

            int id1 = (lsvBill.Tag as Table).ID;

            int id2 = (cbSwitchTable.SelectedItem as Table).ID;
            if (MessageBox.Show(string.Format("Bạn có thật sự muốn chuyển bàn {0} qua bàn {1}", (lsvBill.Tag as Table).Name, (cbSwitchTable.SelectedItem as Table).Name), "Thông báo", MessageBoxButtons.OKCancel) == System.Windows.Forms.DialogResult.OK)
            {
                TableDAO.Instance.SwitchTable(id1, id2);

                LoadTable();
            }
        }

        #endregion        


    }
}

Bài sau chúng ta sẽ cùng nhau tìm hiểu cách mã hóa mật khẩu.

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

---

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