Đăng ký ứng dụng khởi động cùng chương trình ứng dụng Lập lịch C# Winform

Không có gì tuyệt vời hơn là luyện tập với ví dụ thực tế. Nào cùng nhau thử thách bản thân với ứng dụng: Lập lịch.

Bạn nên có kiến thức về:

• Lập trình Winform cơ bản
• Delegate – Event
• Timer
• NotifyIcon
• Registry
• Xử lý ngày tháng năm

Code Form1.Designer.cs

namespace Calender
{
    partial class Form1
    {
        /// <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.components = new System.ComponentModel.Container();
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
            this.panel1 = new System.Windows.Forms.Panel();
            this.panel3 = new System.Windows.Forms.Panel();
            this.panel6 = new System.Windows.Forms.Panel();
            this.nmNotify = new System.Windows.Forms.NumericUpDown();
            this.ckbNotify = new System.Windows.Forms.CheckBox();
            this.btnToDay = new System.Windows.Forms.Button();
            this.dtpkDate = new System.Windows.Forms.DateTimePicker();
            this.panel2 = new System.Windows.Forms.Panel();
            this.pnlMatrix = new System.Windows.Forms.Panel();
            this.panel4 = new System.Windows.Forms.Panel();
            this.btnNext = new System.Windows.Forms.Button();
            this.btnPreviours = new System.Windows.Forms.Button();
            this.btnSunday = new System.Windows.Forms.Button();
            this.btnSaturday = new System.Windows.Forms.Button();
            this.btnFriday = new System.Windows.Forms.Button();
            this.btnThusday = new System.Windows.Forms.Button();
            this.btnWednesday = new System.Windows.Forms.Button();
            this.btnTuesday = new System.Windows.Forms.Button();
            this.btnMonday = new System.Windows.Forms.Button();
            this.tmNotify = new System.Windows.Forms.Timer(this.components);
            this.Notify = new System.Windows.Forms.NotifyIcon(this.components);
            this.panel1.SuspendLayout();
            this.panel3.SuspendLayout();
            this.panel6.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmNotify)).BeginInit();
            this.panel2.SuspendLayout();
            this.panel4.SuspendLayout();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.panel3);
            this.panel1.Controls.Add(this.panel2);
            this.panel1.Location = new System.Drawing.Point(12, 12);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(741, 356);
            this.panel1.TabIndex = 0;
            // 
            // panel3
            // 
            this.panel3.Controls.Add(this.panel6);
            this.panel3.Controls.Add(this.btnToDay);
            this.panel3.Controls.Add(this.dtpkDate);
            this.panel3.Location = new System.Drawing.Point(3, 3);
            this.panel3.Name = "panel3";
            this.panel3.Size = new System.Drawing.Size(735, 28);
            this.panel3.TabIndex = 1;
            // 
            // panel6
            // 
            this.panel6.Controls.Add(this.nmNotify);
            this.panel6.Controls.Add(this.ckbNotify);
            this.panel6.Location = new System.Drawing.Point(7, 0);
            this.panel6.Name = "panel6";
            this.panel6.Size = new System.Drawing.Size(210, 28);
            this.panel6.TabIndex = 2;
            // 
            // nmNotify
            // 
            this.nmNotify.Enabled = false;
            this.nmNotify.Location = new System.Drawing.Point(81, 3);
            this.nmNotify.Maximum = new decimal(new int[] {
            3600,
            0,
            0,
            0});
            this.nmNotify.Minimum = new decimal(new int[] {
            1,
            0,
            0,
            0});
            this.nmNotify.Name = "nmNotify";
            this.nmNotify.Size = new System.Drawing.Size(60, 20);
            this.nmNotify.TabIndex = 1;
            this.nmNotify.Value = new decimal(new int[] {
            1,
            0,
            0,
            0});
            this.nmNotify.ValueChanged += new System.EventHandler(this.nmNotify_ValueChanged);
            // 
            // ckbNotify
            // 
            this.ckbNotify.AutoSize = true;
            this.ckbNotify.Location = new System.Drawing.Point(3, 4);
            this.ckbNotify.Name = "ckbNotify";
            this.ckbNotify.Size = new System.Drawing.Size(78, 17);
            this.ckbNotify.TabIndex = 0;
            this.ckbNotify.Text = "Thông báo";
            this.ckbNotify.UseVisualStyleBackColor = true;
            this.ckbNotify.CheckedChanged += new System.EventHandler(this.ckbNotify_CheckedChanged);
            // 
            // btnToDay
            // 
            this.btnToDay.Location = new System.Drawing.Point(493, 0);
            this.btnToDay.Name = "btnToDay";
            this.btnToDay.Size = new System.Drawing.Size(75, 23);
            this.btnToDay.TabIndex = 1;
            this.btnToDay.Text = "Hôm nay";
            this.btnToDay.UseVisualStyleBackColor = true;
            this.btnToDay.Click += new System.EventHandler(this.btnToDay_Click);
            // 
            // dtpkDate
            // 
            this.dtpkDate.Location = new System.Drawing.Point(287, 3);
            this.dtpkDate.Name = "dtpkDate";
            this.dtpkDate.Size = new System.Drawing.Size(200, 20);
            this.dtpkDate.TabIndex = 0;
            this.dtpkDate.ValueChanged += new System.EventHandler(this.dtpkDate_ValueChanged);
            // 
            // panel2
            // 
            this.panel2.Controls.Add(this.pnlMatrix);
            this.panel2.Controls.Add(this.panel4);
            this.panel2.Location = new System.Drawing.Point(3, 37);
            this.panel2.Name = "panel2";
            this.panel2.Size = new System.Drawing.Size(735, 314);
            this.panel2.TabIndex = 0;
            // 
            // pnlMatrix
            // 
            this.pnlMatrix.Location = new System.Drawing.Point(88, 55);
            this.pnlMatrix.Name = "pnlMatrix";
            this.pnlMatrix.Size = new System.Drawing.Size(561, 254);
            this.pnlMatrix.TabIndex = 1;
            // 
            // panel4
            // 
            this.panel4.Controls.Add(this.btnNext);
            this.panel4.Controls.Add(this.btnPreviours);
            this.panel4.Controls.Add(this.btnSunday);
            this.panel4.Controls.Add(this.btnSaturday);
            this.panel4.Controls.Add(this.btnFriday);
            this.panel4.Controls.Add(this.btnThusday);
            this.panel4.Controls.Add(this.btnWednesday);
            this.panel4.Controls.Add(this.btnTuesday);
            this.panel4.Controls.Add(this.btnMonday);
            this.panel4.Location = new System.Drawing.Point(3, 3);
            this.panel4.Name = "panel4";
            this.panel4.Size = new System.Drawing.Size(729, 46);
            this.panel4.TabIndex = 0;
            // 
            // btnNext
            // 
            this.btnNext.Location = new System.Drawing.Point(651, 3);
            this.btnNext.Name = "btnNext";
            this.btnNext.Size = new System.Drawing.Size(75, 40);
            this.btnNext.TabIndex = 8;
            this.btnNext.Text = "Tháng sau";
            this.btnNext.UseVisualStyleBackColor = true;
            this.btnNext.Click += new System.EventHandler(this.btnNext_Click);
            // 
            // btnPreviours
            // 
            this.btnPreviours.Location = new System.Drawing.Point(4, 3);
            this.btnPreviours.Name = "btnPreviours";
            this.btnPreviours.Size = new System.Drawing.Size(75, 40);
            this.btnPreviours.TabIndex = 7;
            this.btnPreviours.Text = "Tháng trước";
            this.btnPreviours.UseVisualStyleBackColor = true;
            this.btnPreviours.Click += new System.EventHandler(this.btnPreviours_Click);
            // 
            // btnSunday
            // 
            this.btnSunday.Location = new System.Drawing.Point(571, 3);
            this.btnSunday.Name = "btnSunday";
            this.btnSunday.Size = new System.Drawing.Size(75, 40);
            this.btnSunday.TabIndex = 6;
            this.btnSunday.Text = "Chủ nhật";
            this.btnSunday.UseVisualStyleBackColor = true;
            // 
            // btnSaturday
            // 
            this.btnSaturday.Location = new System.Drawing.Point(490, 3);
            this.btnSaturday.Name = "btnSaturday";
            this.btnSaturday.Size = new System.Drawing.Size(75, 40);
            this.btnSaturday.TabIndex = 5;
            this.btnSaturday.Text = "Thứ 7";
            this.btnSaturday.UseVisualStyleBackColor = true;
            // 
            // btnFriday
            // 
            this.btnFriday.Location = new System.Drawing.Point(409, 3);
            this.btnFriday.Name = "btnFriday";
            this.btnFriday.Size = new System.Drawing.Size(75, 40);
            this.btnFriday.TabIndex = 4;
            this.btnFriday.Text = "Thứ 6";
            this.btnFriday.UseVisualStyleBackColor = true;
            // 
            // btnThusday
            // 
            this.btnThusday.Location = new System.Drawing.Point(328, 3);
            this.btnThusday.Name = "btnThusday";
            this.btnThusday.Size = new System.Drawing.Size(75, 40);
            this.btnThusday.TabIndex = 3;
            this.btnThusday.Text = "Thứ 5";
            this.btnThusday.UseVisualStyleBackColor = true;
            // 
            // btnWednesday
            // 
            this.btnWednesday.Location = new System.Drawing.Point(247, 3);
            this.btnWednesday.Name = "btnWednesday";
            this.btnWednesday.Size = new System.Drawing.Size(75, 40);
            this.btnWednesday.TabIndex = 2;
            this.btnWednesday.Text = "Thứ 4";
            this.btnWednesday.UseVisualStyleBackColor = true;
            // 
            // btnTuesday
            // 
            this.btnTuesday.Location = new System.Drawing.Point(166, 3);
            this.btnTuesday.Name = "btnTuesday";
            this.btnTuesday.Size = new System.Drawing.Size(75, 40);
            this.btnTuesday.TabIndex = 1;
            this.btnTuesday.Text = "Thứ 3";
            this.btnTuesday.UseVisualStyleBackColor = true;
            // 
            // btnMonday
            // 
            this.btnMonday.Location = new System.Drawing.Point(85, 3);
            this.btnMonday.Name = "btnMonday";
            this.btnMonday.Size = new System.Drawing.Size(75, 40);
            this.btnMonday.TabIndex = 0;
            this.btnMonday.Text = "Thứ 2";
            this.btnMonday.UseVisualStyleBackColor = true;
            // 
            // tmNotify
            // 
            this.tmNotify.Enabled = true;
            this.tmNotify.Interval = 60000;
            this.tmNotify.Tick += new System.EventHandler(this.tmNotify_Tick);
            // 
            // Notify
            // 
            this.Notify.Icon = ((System.Drawing.Icon)(resources.GetObject("Notify.Icon")));
            this.Notify.Text = "Lập lịch";
            this.Notify.Visible = true;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(765, 370);
            this.Controls.Add(this.panel1);
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "Lập lịch công việc";
            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Form1_FormClosing);
            this.panel1.ResumeLayout(false);
            this.panel3.ResumeLayout(false);
            this.panel6.ResumeLayout(false);
            this.panel6.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmNotify)).EndInit();
            this.panel2.ResumeLayout(false);
            this.panel4.ResumeLayout(false);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Panel panel3;
        private System.Windows.Forms.Panel panel6;
        private System.Windows.Forms.NumericUpDown nmNotify;
        private System.Windows.Forms.CheckBox ckbNotify;
        private System.Windows.Forms.Button btnToDay;
        private System.Windows.Forms.DateTimePicker dtpkDate;
        private System.Windows.Forms.Panel panel2;
        private System.Windows.Forms.Panel pnlMatrix;
        private System.Windows.Forms.Panel panel4;
        private System.Windows.Forms.Button btnNext;
        private System.Windows.Forms.Button btnPreviours;
        private System.Windows.Forms.Button btnSunday;
        private System.Windows.Forms.Button btnSaturday;
        private System.Windows.Forms.Button btnFriday;
        private System.Windows.Forms.Button btnThusday;
        private System.Windows.Forms.Button btnWednesday;
        private System.Windows.Forms.Button btnTuesday;
        private System.Windows.Forms.Button btnMonday;
        private System.Windows.Forms.Timer tmNotify;
        private System.Windows.Forms.NotifyIcon Notify;
    }
}

Code Form1.cs

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Serialization;

namespace Calender
{
    public partial class Form1 : Form
    {
        #region Peoperties   

        private int appTime;

        public int AppTime
        {
            get { return appTime; }
            set { appTime = value; }
        }

        private string filePath = "data.xml";

        private List<List<Button>> matrix;

        public List<List<Button>> Matrix
        {
            get { return matrix; }
            set { matrix = value; }
        }

        private PlanData job;

        public PlanData Job
        {
            get { return job; }
            set { job = value; }
        }

        private List<string> dateOfWeek = new List<string>(){ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
        #endregion
        public Form1()
        {
            InitializeComponent();

            RegistryKey regkey = Registry.CurrentUser.CreateSubKey("Software\\LapLich");
            //mo registry khoi dong cung win
            RegistryKey regstart = Registry.CurrentUser.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
            string keyvalue = "1";
            //string subkey = "Software\\ManhQuyen";
            try
            {
                //chen gia tri key
                regkey.SetValue("Index", keyvalue);
                //regstart.SetValue("taoregistrytronghethong", "E:\\Studing\\Bai Tap\\CSharp\\Channel 4\\bai temp\\tao registry trong he thong\\tao registry trong he thong\\bin\\Debug\\tao registry trong he thong.exe");
                regstart.SetValue("LapLich", Application.StartupPath + "\\Lập lịch.exe");
                ////dong tien trinh ghi key
                //regkey.Close();
            }
            catch (System.Exception ex)
            {
            }

            tmNotify.Start();
            appTime = 0;
            LoadMatrix();

            try
            {
                Job = DeserializeFromXML(filePath) as PlanData;
            }
            catch
            {
                SetDefaultJob();
            }
        }

        void SetDefaultJob()
        {
            Job = new PlanData();
            Job.Job = new List<PlanItem>();
            Job.Job.Add(new PlanItem() 
            { 
                Date = DateTime.Now,
                FromTime = new Point(4, 0), 
                ToTime = new Point(5, 0), 
                Job = "Thử nghiệm thôi",
                Status = PlanItem.ListStatus[(int)EPlanItem.COMING]
            });
        }

        void LoadMatrix()
        {
            Matrix = new List<List<Button>>();

            Button oldBtn = new Button() { Width = 0, Height = 0, Location = new Point(-Cons.margin, 0) };
            for (int i = 0; i < Cons.DayOfColumn; i++)
            {
                Matrix.Add(new List<Button>());
                for (int j = 0; j < Cons.DayOfWeek; j++)
                {
                    Button btn = new Button() { Width = Cons.dateButtonWidth, Height = Cons.dateButtonHeight};
                    btn.Location = new Point(oldBtn.Location.X + oldBtn.Width + Cons.margin, oldBtn.Location.Y);
                    btn.Click += btn_Click;

                    pnlMatrix.Controls.Add(btn);
                    Matrix[i].Add(btn);

                    oldBtn = btn;
                }
                oldBtn = new Button() { Width = 0, Height = 0, Location = new Point(-Cons.margin, oldBtn.Location.Y + Cons.dateButtonHeight) };
            }

            SetDefaultDate();
        }

        void btn_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty((sender as Button).Text))
                return;
            DailyPlan daily = new DailyPlan(new DateTime(dtpkDate.Value.Year, dtpkDate.Value.Month, Convert.ToInt32((sender as Button).Text)), Job);
            daily.ShowDialog();
        }

        int DayOfMonth(DateTime date)
        {
            switch(date.Month)
            {
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                    return 31;
                case 2:
                    if ((date.Year % 4 == 0 && date.Year % 100 != 0) || date.Year % 400 == 0)
                        return 29;
                    else
                        return 28;
                default:
                    return 30;;
            }
        }

        void AddNumberIntoMatrixByDate(DateTime date)
        {
            ClearMatrix();
            DateTime useDate = new DateTime(date.Year, date.Month, 1);
            
            int line = 0;

            for (int i = 1; i <= DayOfMonth(date); i++)
            {
                int column = dateOfWeek.IndexOf(useDate.DayOfWeek.ToString());
                Button btn = Matrix[line][column];
                btn.Text = i.ToString();

                if (isEqualDate(useDate, DateTime.Now))
                {
                    btn.BackColor = Color.Yellow;
                }

                if (isEqualDate(useDate, date))
                {
                    btn.BackColor = Color.Aqua;
                }

                if (column >= 6)
                    line++;

                useDate = useDate.AddDays(1);
            }
        }

        bool isEqualDate(DateTime dateA, DateTime dateB)
        {
            return dateA.Year == dateB.Year && dateA.Month == dateB.Month && dateA.Day == dateB.Day;
        }

        void ClearMatrix()
        {
            for (int i = 0; i < Matrix.Count; i++)
            {
                for (int j = 0; j < Matrix[i].Count; j++)
                {
                    Button btn = Matrix[i][j];
                    btn.Text = "";
                    btn.BackColor = Color.WhiteSmoke;
                }
            }
        }

        void SetDefaultDate()
        {
            dtpkDate.Value = DateTime.Now;
        }

        private void dtpkDate_ValueChanged(object sender, EventArgs e)
        {
            AddNumberIntoMatrixByDate((sender as DateTimePicker).Value);
        }

        private void btnNext_Click(object sender, EventArgs e)
        {
            dtpkDate.Value = dtpkDate.Value.AddMonths(1);
        }

        private void btnPreviours_Click(object sender, EventArgs e)
        {
            dtpkDate.Value = dtpkDate.Value.AddMonths(-1);
        }

        private void btnToDay_Click(object sender, EventArgs e)
        {
            SetDefaultDate();
        }

        private void SerializeToXML(object data, string filePath)
        {
            FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write);
            XmlSerializer sr = new XmlSerializer(typeof(PlanData));

            sr.Serialize(fs, data);

            fs.Close();
        }

        private object DeserializeFromXML(string filePath)
        {
            FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            try
            {
                XmlSerializer sr = new XmlSerializer(typeof(PlanData));

                object result = sr.Deserialize(fs);
                fs.Close();
                return result;
            }
            catch (Exception e)
            {
                fs.Close();
                throw new NotImplementedException();
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            SerializeToXML(Job, filePath);
        }

        private void tmNotify_Tick(object sender, EventArgs e)
        {
            if (!ckbNotify.Checked)
                return;

            AppTime++;

            if (AppTime < Cons.notifyTime)
                return;

            if (Job == null || Job.Job == null)
                return;

            DateTime currentDate = DateTime.Now;
            List<PlanItem> todayjobs = Job.Job.Where(p=>p.Date.Year == currentDate.Year && p.Date.Month == currentDate.Month && p.Date.Day == currentDate.Day).ToList();
            Notify.ShowBalloonTip(Cons.notifyTimeOut, "Lịch công việc", string.Format("Bạn có {0} việc trong ngày hôm nay", todayjobs.Count), ToolTipIcon.Info);

            AppTime = 0;
        }

        private void nmNotify_ValueChanged(object sender, EventArgs e)
        {
            Cons.notifyTime = (int)nmNotify.Value;
        }

        private void ckbNotify_CheckedChanged(object sender, EventArgs e)
        {
            nmNotify.Enabled = ckbNotify.Checked;
        }
    }
}

Code DailyPlan.Designer.cs

namespace Calender
{
    partial class DailyPlan
    {
        /// <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.panel1 = new System.Windows.Forms.Panel();
            this.pnlJob = new System.Windows.Forms.Panel();
            this.dtpkDate = new System.Windows.Forms.DateTimePicker();
            this.mnsMain = new System.Windows.Forms.MenuStrip();
            this.mnsiAddJob = new System.Windows.Forms.ToolStripMenuItem();
            this.mnsiToDay = new System.Windows.Forms.ToolStripMenuItem();
            this.panel3 = new System.Windows.Forms.Panel();
            this.btnNextDay = new System.Windows.Forms.Button();
            this.btnPrevioursDay = new System.Windows.Forms.Button();
            this.panel1.SuspendLayout();
            this.mnsMain.SuspendLayout();
            this.panel3.SuspendLayout();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.panel3);
            this.panel1.Controls.Add(this.pnlJob);
            this.panel1.Location = new System.Drawing.Point(12, 27);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(754, 484);
            this.panel1.TabIndex = 0;
            // 
            // pnlJob
            // 
            this.pnlJob.Location = new System.Drawing.Point(3, 32);
            this.pnlJob.Name = "pnlJob";
            this.pnlJob.Size = new System.Drawing.Size(748, 447);
            this.pnlJob.TabIndex = 0;
            // 
            // dtpkDate
            // 
            this.dtpkDate.Location = new System.Drawing.Point(265, 4);
            this.dtpkDate.Name = "dtpkDate";
            this.dtpkDate.Size = new System.Drawing.Size(200, 20);
            this.dtpkDate.TabIndex = 1;
            // 
            // mnsMain
            // 
            this.mnsMain.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.mnsiAddJob,
            this.mnsiToDay});
            this.mnsMain.Location = new System.Drawing.Point(0, 0);
            this.mnsMain.Name = "mnsMain";
            this.mnsMain.Size = new System.Drawing.Size(775, 24);
            this.mnsMain.TabIndex = 1;
            this.mnsMain.Text = "menuStrip1";
            // 
            // mnsiAddJob
            // 
            this.mnsiAddJob.Name = "mnsiAddJob";
            this.mnsiAddJob.Size = new System.Drawing.Size(74, 20);
            this.mnsiAddJob.Text = "Thêm việc";
            // 
            // mnsiToDay
            // 
            this.mnsiToDay.Name = "mnsiToDay";
            this.mnsiToDay.Size = new System.Drawing.Size(68, 20);
            this.mnsiToDay.Text = "Hôm nay";
            // 
            // panel3
            // 
            this.panel3.Controls.Add(this.btnPrevioursDay);
            this.panel3.Controls.Add(this.btnNextDay);
            this.panel3.Controls.Add(this.dtpkDate);
            this.panel3.Location = new System.Drawing.Point(3, 3);
            this.panel3.Name = "panel3";
            this.panel3.Size = new System.Drawing.Size(748, 27);
            this.panel3.TabIndex = 1;
            // 
            // btnNextDay
            // 
            this.btnNextDay.Location = new System.Drawing.Point(670, 3);
            this.btnNextDay.Name = "btnNextDay";
            this.btnNextDay.Size = new System.Drawing.Size(75, 23);
            this.btnNextDay.TabIndex = 2;
            this.btnNextDay.Text = "Ngày mai";
            this.btnNextDay.UseVisualStyleBackColor = true;
            // 
            // btnPrevioursDay
            // 
            this.btnPrevioursDay.Location = new System.Drawing.Point(3, 1);
            this.btnPrevioursDay.Name = "btnPrevioursDay";
            this.btnPrevioursDay.Size = new System.Drawing.Size(75, 23);
            this.btnPrevioursDay.TabIndex = 3;
            this.btnPrevioursDay.Text = "Hôm qua";
            this.btnPrevioursDay.UseVisualStyleBackColor = true;
            // 
            // DailyPlan
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(775, 511);
            this.Controls.Add(this.panel1);
            this.Controls.Add(this.mnsMain);
            this.MainMenuStrip = this.mnsMain;
            this.Name = "DailyPlan";
            this.Text = "Lịch trong ngày";
            this.panel1.ResumeLayout(false);
            this.mnsMain.ResumeLayout(false);
            this.mnsMain.PerformLayout();
            this.panel3.ResumeLayout(false);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Panel panel3;
        private System.Windows.Forms.Button btnPrevioursDay;
        private System.Windows.Forms.Button btnNextDay;
        private System.Windows.Forms.DateTimePicker dtpkDate;
        private System.Windows.Forms.Panel pnlJob;
        private System.Windows.Forms.MenuStrip mnsMain;
        private System.Windows.Forms.ToolStripMenuItem mnsiAddJob;
        private System.Windows.Forms.ToolStripMenuItem mnsiToDay;
    }
}

Code DailyPlan.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Calender
{
    public partial class DailyPlan : Form
    {
        private DateTime date;

        public DateTime Date
        {
            get { return date; }
            set { date = value; }
        }

        private PlanData job;

        public PlanData Job
        {
            get { return job; }
            set { job = value; }
        }

        FlowLayoutPanel fPanel = new FlowLayoutPanel();

        public DailyPlan(DateTime date, PlanData job)
        {
            InitializeComponent();

            this.Date = date;
            this.Job = job;

            fPanel.Width = pnlJob.Width;
            fPanel.Height = pnlJob.Height;
            pnlJob.Controls.Add(fPanel);

            dtpkDate.Value = Date;
        }

        void ShowJobByDate(DateTime date)
        {
            fPanel.Controls.Clear();
            if (Job != null && Job.Job != null)
            {
                List<PlanItem> todayJob = GetJobByDay(date);
                for (int i = 0; i < todayJob.Count; i++)
                {
                    AddJob(todayJob[i]);                   
                }
            }
        }

        void AddJob(PlanItem job)
        {
            AJob aJob = new AJob(job);
            aJob.Edited += aJob_Edited;
            aJob.Deleted += aJob_Deleteed;

            fPanel.Controls.Add(aJob);
        }

        void aJob_Deleteed(object sender, EventArgs e)
        {
            AJob uc = sender as AJob;
            PlanItem job = uc.Job;

            fPanel.Controls.Remove(uc);
            Job.Job.Remove(job);
        }

        void aJob_Edited(object sender, EventArgs e)
        {
        }

        List<PlanItem> GetJobByDay(DateTime date)
        {
            return Job.Job.Where(p=>p.Date.Year == date.Year && p.Date.Month == date.Month && p.Date.Day == date.Day).ToList();
        }

        private void dtpkDate_ValueChanged(object sender, EventArgs e)
        {
            ShowJobByDate((sender as DateTimePicker).Value);
        }

        private void btnNextDay_Click(object sender, EventArgs e)
        {
            dtpkDate.Value = dtpkDate.Value.AddDays(1);
        }

        private void btnPrevioursDay_Click(object sender, EventArgs e)
        {
            dtpkDate.Value = dtpkDate.Value.AddDays(-1);
        }

        private void mnsiAddJob_Click(object sender, EventArgs e)
        {
            PlanItem item = new PlanItem() { Date = dtpkDate.Value};
            Job.Job.Add(item);
            AddJob(item);
        }

        private void mnsiToDay_Click(object sender, EventArgs e)
        {
            dtpkDate.Value = DateTime.Now;
        }
    }
}

Code AJob.Designer.cs

namespace Calender
{
    partial class AJob
    {
        /// <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 Component 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.panel1 = new System.Windows.Forms.Panel();
            this.ckbDone = new System.Windows.Forms.CheckBox();
            this.txbJob = new System.Windows.Forms.TextBox();
            this.panel2 = new System.Windows.Forms.Panel();
            this.nmFromHours = new System.Windows.Forms.NumericUpDown();
            this.nmFromMinute = new System.Windows.Forms.NumericUpDown();
            this.label1 = new System.Windows.Forms.Label();
            this.nmToMinute = new System.Windows.Forms.NumericUpDown();
            this.nmToHours = new System.Windows.Forms.NumericUpDown();
            this.cbStatus = new System.Windows.Forms.ComboBox();
            this.btnEdit = new System.Windows.Forms.Button();
            this.btnDelete = new System.Windows.Forms.Button();
            this.panel1.SuspendLayout();
            this.panel2.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmFromHours)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmFromMinute)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmToMinute)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmToHours)).BeginInit();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.btnDelete);
            this.panel1.Controls.Add(this.btnEdit);
            this.panel1.Controls.Add(this.cbStatus);
            this.panel1.Controls.Add(this.panel2);
            this.panel1.Controls.Add(this.txbJob);
            this.panel1.Controls.Add(this.ckbDone);
            this.panel1.Location = new System.Drawing.Point(3, 0);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(747, 30);
            this.panel1.TabIndex = 0;
            // 
            // ckbDone
            // 
            this.ckbDone.AutoSize = true;
            this.ckbDone.Location = new System.Drawing.Point(3, 3);
            this.ckbDone.Name = "ckbDone";
            this.ckbDone.Size = new System.Drawing.Size(15, 14);
            this.ckbDone.TabIndex = 0;
            this.ckbDone.UseVisualStyleBackColor = true;
            // 
            // txbJob
            // 
            this.txbJob.Location = new System.Drawing.Point(24, 0);
            this.txbJob.Name = "txbJob";
            this.txbJob.Size = new System.Drawing.Size(308, 20);
            this.txbJob.TabIndex = 1;
            // 
            // panel2
            // 
            this.panel2.Controls.Add(this.nmToMinute);
            this.panel2.Controls.Add(this.nmToHours);
            this.panel2.Controls.Add(this.label1);
            this.panel2.Controls.Add(this.nmFromMinute);
            this.panel2.Controls.Add(this.nmFromHours);
            this.panel2.Location = new System.Drawing.Point(338, 0);
            this.panel2.Name = "panel2";
            this.panel2.Size = new System.Drawing.Size(200, 30);
            this.panel2.TabIndex = 2;
            // 
            // nmFromHours
            // 
            this.nmFromHours.Location = new System.Drawing.Point(3, 3);
            this.nmFromHours.Name = "nmFromHours";
            this.nmFromHours.Size = new System.Drawing.Size(37, 20);
            this.nmFromHours.TabIndex = 0;
            // 
            // nmFromMinute
            // 
            this.nmFromMinute.Location = new System.Drawing.Point(46, 3);
            this.nmFromMinute.Name = "nmFromMinute";
            this.nmFromMinute.Size = new System.Drawing.Size(37, 20);
            this.nmFromMinute.TabIndex = 1;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(89, 5);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(27, 13);
            this.label1.TabIndex = 2;
            this.label1.Text = "Đến";
            // 
            // nmToMinute
            // 
            this.nmToMinute.Location = new System.Drawing.Point(160, 3);
            this.nmToMinute.Name = "nmToMinute";
            this.nmToMinute.Size = new System.Drawing.Size(37, 20);
            this.nmToMinute.TabIndex = 4;
            // 
            // nmToHours
            // 
            this.nmToHours.Location = new System.Drawing.Point(117, 3);
            this.nmToHours.Name = "nmToHours";
            this.nmToHours.Size = new System.Drawing.Size(37, 20);
            this.nmToHours.TabIndex = 3;
            // 
            // cbStatus
            // 
            this.cbStatus.FormattingEnabled = true;
            this.cbStatus.Location = new System.Drawing.Point(541, 2);
            this.cbStatus.Name = "cbStatus";
            this.cbStatus.Size = new System.Drawing.Size(103, 21);
            this.cbStatus.TabIndex = 3;
            // 
            // btnEdit
            // 
            this.btnEdit.Location = new System.Drawing.Point(650, 0);
            this.btnEdit.Name = "btnEdit";
            this.btnEdit.Size = new System.Drawing.Size(45, 23);
            this.btnEdit.TabIndex = 4;
            this.btnEdit.Text = "Sửa";
            this.btnEdit.UseVisualStyleBackColor = true;
            // 
            // btnDelete
            // 
            this.btnDelete.Location = new System.Drawing.Point(699, 0);
            this.btnDelete.Name = "btnDelete";
            this.btnDelete.Size = new System.Drawing.Size(45, 23);
            this.btnDelete.TabIndex = 5;
            this.btnDelete.Text = "Xóa";
            this.btnDelete.UseVisualStyleBackColor = true;
            // 
            // AJob
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.Controls.Add(this.panel1);
            this.Name = "AJob";
            this.Size = new System.Drawing.Size(753, 33);
            this.panel1.ResumeLayout(false);
            this.panel1.PerformLayout();
            this.panel2.ResumeLayout(false);
            this.panel2.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)(this.nmFromHours)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmFromMinute)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmToMinute)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.nmToHours)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Panel panel2;
        private System.Windows.Forms.NumericUpDown nmFromHours;
        private System.Windows.Forms.TextBox txbJob;
        private System.Windows.Forms.CheckBox ckbDone;
        private System.Windows.Forms.Button btnDelete;
        private System.Windows.Forms.Button btnEdit;
        private System.Windows.Forms.ComboBox cbStatus;
        private System.Windows.Forms.NumericUpDown nmToMinute;
        private System.Windows.Forms.NumericUpDown nmToHours;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.NumericUpDown nmFromMinute;
    }
}

Code AJob.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Calender
{
    public partial class AJob : UserControl
    {
        private PlanItem job;

        public PlanItem Job
        {
            get { return job; }
            set { job = value; }
        }

        private event EventHandler edited;
        public event EventHandler Edited
        {
            add { edited += value; }
            remove { edited -= value; }
        }

        private event EventHandler deleted;
        public event EventHandler Deleted
        {
            add { deleted += value; }
            remove { deleted -= value; }
        }
        public AJob(PlanItem job)
        {
            InitializeComponent();

            cbStatus.DataSource = PlanItem.ListStatus;

            this.Job = job;

            ShowInfo();
        }

        void ShowInfo()
        {
            txbJob.Text = Job.Job;
            nmFromHours.Value = Job.FromTime.X;
            nmFromMinute.Value = Job.FromTime.Y;
            nmToHours.Value = Job.ToTime.X;
            nmToMinute.Value = Job.ToTime.Y;
            cbStatus.SelectedIndex = PlanItem.ListStatus.IndexOf(Job.Status);
            ckbDone.Checked = PlanItem.ListStatus.IndexOf(Job.Status) == (int)EPlanItem.DONE ? true : false;
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (deleted != null)
                deleted(this, new EventArgs());
        }

        private void btnEdit_Click(object sender, EventArgs e)
        {
            Job.Job = txbJob.Text;
            Job.FromTime = new Point((int)nmFromHours.Value, (int)nmFromMinute.Value);
            Job.ToTime = new Point((int)nmToHours.Value, (int)nmToMinute.Value);
            Job.Status = PlanItem.ListStatus[cbStatus.SelectedIndex];

            if (edited != null)
                edited(this, new EventArgs());
        }

        private void ckbDone_CheckedChanged(object sender, EventArgs e)
        {
            cbStatus.SelectedIndex = ckbDone.Checked ? (int)EPlanItem.DONE : (int)EPlanItem.DOING;
        }
    }
}

Code Cons.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Calender
{
    class Cons
    {
        public static int DayOfWeek = 7;
        public static int DayOfColumn = 6;

        public static int dateButtonWidth = 75;
        public static int dateButtonHeight = 40;

        public static int margin = 6;
        public static int notifyTime = 1;
        public static int notifyTimeOut = 10000;
    }
}

Code PlanItem.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Calender
{
    public class PlanItem
    {
        private DateTime date;

        public DateTime Date
        {
            get { return date; }
            set { date = value; }
        }

        private string job;

        public string Job
        {
            get { return job; }
            set { job = value; }
        }

        private Point fromTime;

        public Point FromTime
        {
            get { return fromTime; }
            set { fromTime = value; }
        }

        private Point toTime;

        public Point ToTime
        {
            get { return toTime; }
            set { toTime = value; }
        }

        private string status;

        public string Status
        {
            get { return status; }
            set { status = value; }
        }

        public static List<string> ListStatus = new List<string>() { "DONE", "DOING", "COMING", "MISSED"};
    }

    public enum EPlanItem
    {
        DONE,
        DOING,
        COMING,
        MISSED
    }
}

Code PlanData.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Calender
{
    [Serializable]
    public class PlanData
    {
        private List<PlanItem> job;

        public List<PlanItem> Job
        {
            get { return job; }
            set { job = value; }
        }
    }
}

File ứng dụng Demo

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