動態創建按鈕

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();           
            int num = 1;                //聲明變量
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Button btn = new Button();  //動態創新按鈕，創建實例
                    btn.Text = num.ToString();  //將num的值賦值給按鈕的text屬性，num自增
                    btn.Width = 24;             //設置控件的長度
                    btn.Height = 20;            //設置控件的寬度
                    btn.Top = i * 20 + 3;       //設置控件距離容器頂部的位置
                    btn.Left = j * 24 + 5;      //設置控件距離容器左邊的位置
                    Controls.Add(btn);          //將控件顯示在容器中
                    btn.Click+=new EventHandler(btn_Click);
                    num++;
                }
            }
            Label lab = new Label();
            lab.Top = 68;
            lab.Left = 29;
            lab.Name = "LableTxt";
            Controls.Add(lab);
        }
        private void btn_Click(object sender, EventArgs e)
        {
            Button b = (Button)sender;
            Label newlable = (Label)Controls.Find("LableTxt", true)[0];
            newlable.Text = "你單擊了" + b.Text + "號按鈕";
            b.Text = "*";
        }
    }
}