关联事件，向窗体中添加控件，设置控件属性等系列操作

 private void Form1_Load(object sender, EventArgs e)
        {
            Label lb1=new Label();
            lb1.Text="123";
            Label lb2 = new Label();
            lb2.Text = "234";
            Label lb3 = new Label();
            lb3.Text = "345";
            TextBox tb = new TextBox();
            tb.Text = "textboxTest";
            tb.TextChanged+=new EventHandler(tb_TextChanged);
            tb.Validating+=new CancelEventHandler(tb_Validating);
            TableLayoutPanel tbl = new TableLayoutPanel();
            tbl.ColumnCount = 5;
            tbl.RowCount = 5;
            for (int i = 0; i < tbl.RowCount; i++)
            {
                tbl.RowStyles.Add(new ColumnStyle(SizeType.Percent, 20F));
            }
            for (int i = 0; i < tbl.ColumnCount; i++)
            {
                tbl.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 20F));
            }
            tbl.Dock = DockStyle.Fill;
            tbl.Controls.Add(lb1,0,0);
            tbl.Controls.Add(lb2,1,0);
            tbl.Controls.Add(lb3,0 ,2);
            tbl.Controls.Add(tb, 0, 3);
            this.Controls.Add(tbl);
        }

private void tb_TextChanged(object sender, EventArgs e)
        {
            MessageBox.Show("改变");
        }
        private void tb_Validating(object sender, CancelEventArgs e)
        {
            Control ctl = (Control)sender;
            if (!ctl.Text.IsNumeric())
            {
                MessageBox.Show("请输入数字");
                e.Cancel = true;
            }
        }

添加事件后 要在项目中写出事件代码

可以自己新建一个From窗体在其中使用图形化面板添加 然后在

public Form1()
{
InitializeComponent();
}

中查看代码