关联事件，向窗体中添加控件，设置控件属性等系列操作

 1  private void Form1_Load(object sender, EventArgs e)
 2         {
 3             Label lb1=new Label();
 4             lb1.Text="123";
 5             Label lb2 = new Label();
 6             lb2.Text = "234";
 7             Label lb3 = new Label();
 8             lb3.Text = "345";
 9             TextBox tb = new TextBox();
10             tb.Text = "textboxTest";
11             tb.TextChanged+=new EventHandler(tb_TextChanged);
12             tb.Validating+=new CancelEventHandler(tb_Validating);
13             TableLayoutPanel tbl = new TableLayoutPanel();
14             tbl.ColumnCount = 5;
15             tbl.RowCount = 5;
16             for (int i = 0; i < tbl.RowCount; i++)
17             {
18                 tbl.RowStyles.Add(new ColumnStyle(SizeType.Percent, 20F));
19             }
20             for (int i = 0; i < tbl.ColumnCount; i++)
21             {
22                 tbl.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 20F));
23             }
24             tbl.Dock = DockStyle.Fill;
25             tbl.Controls.Add(lb1,0,0);
26             tbl.Controls.Add(lb2,1,0);
27             tbl.Controls.Add(lb3,0 ,2);
28             tbl.Controls.Add(tb, 0, 3);
29             this.Controls.Add(tbl);
30         }

 1 private void tb_TextChanged(object sender, EventArgs e)
 2         {
 3             MessageBox.Show("改变");
 4         }
 5         private void tb_Validating(object sender, CancelEventArgs e)
 6         {
 7             Control ctl = (Control)sender;
 8             if (!ctl.Text.IsNumeric())
 9             {
10                 MessageBox.Show("请输入数字");
11                 e.Cancel = true;
12             }
13         }