动态生成控件

动态生成控件
        for (int i = 0; i < 8; i++)
        {
            Lable labMy = new Lable ();
            Panel1.Controls.Add(labMy);
            labMy.Text = i.ToString();
            labMy.ID ="lab"+ i.ToString();
        }

遍历控件
foreach(Control ctl in this.Controls[1].Controls)
{
    if(ctl.GetType().Name=="TextBox")
    {
        TextBox tb =new TextBox();
        tb=(TextBox)this.FindControl(ctl.ID);
        Response.Write("<script>alert('" + tb=.Text+ "的值为空。');</script>");
    }
}