如何对动态创建控件进行验证以及在Ajax环境中的使用

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " Test.aspx.cs "  Inherits = " Test "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
      
         < asp:Table ID = " Table1 "  runat = " server " >
         </ asp:Table >
         < asp:Button ID = " btnAddControl "  runat = " server "  Text = " 动态创建控件 "  OnClick = " btnAddControl_Click "   />   
     < asp:Button ID = " btnValidator "  runat = " server "  Text = " 验证动态控件 "  Enabled = " false "   />
    
     </ form >
</ body >
</ html >

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

public   partial   class  Test : System.Web.UI.Page
{
    private void Page_Load(object sender, System.EventArgs e)
    {
        
    }


    protected void btnAddControl_Click(object sender, EventArgs e)
    {        
        TextBox _TxtBox = new TextBox();//动态创建一个TextBox
        _TxtBox.ID = "TextBox1"; 
       
        RequiredFieldValidator _Require = new RequiredFieldValidator();//动态创建一个验证控件
        _Require.ErrorMessage = "请输入";
        _Require.SetFocusOnError = true;
        _Require.ControlToValidate = _TxtBox.ID;      
 
        TableCell Cell = new TableCell();
        Cell.Controls.Add(_TxtBox);
        Cell.Controls.Add(_Require);//将刚才创建的二个控件，加入Cell

        TableRow Row = new TableRow();
        Row.Controls.Add(Cell);
        this.Table1.Rows.Add(Row);

        btnValidator.Enabled = true;
    }
}

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " Test.aspx.cs "  Inherits = " Test "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        
<asp:UpdatePanel ID="UpdatePanel1" runat="server" >
    <ContentTemplate>
        <div style="border:solid 2px red"> <%--为突出显示，把UpdatePanel加了一个红色框--%>
         < asp:Table ID = " Table1 "  runat = " server " >
         </ asp:Table >
         < asp:Button ID = " btnAddControl "  runat = " server "  Text = " 动态创建控件 "  OnClick = " btnAddControl_Click "   />
        </div>
</ContentTemplate>
</asp:UpdatePanel>
    
    
       < asp:Button ID = " btnValidator "  runat = " server "  Text = " 验证动态控件 "  Enabled="true"   />
    
     </ form >
</ body >
</ html >  

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " Test.aspx.cs "  Inherits = " Test "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
        < asp:ScriptManager ID = " ScriptManager1 "  runat = " server " >
         </ asp:ScriptManager >
        
< asp:UpdatePanel ID = " UpdatePanel1 "  runat = " server "   >
     < ContentTemplate >
         < div style = " border:solid 2px red " ><%-- 为突出显示，把UpdatePanel加了一个红色框 --%>
         < asp:Table ID = " Table1 "  runat = " server " >
         </ asp:Table >
         < asp:Button ID = " btnAddControl "  runat = " server "  Text = " 动态创建控件 "  OnClick = " btnAddControl_Click "   />
        </ div >
</ ContentTemplate >
</ asp:UpdatePanel >
    
    
  <div style="display:none">
        <asp:TextBox ID="_TxtNeverUsed" runat="server" Text="*"></asp:TextBox>
        <asp:RequiredFieldValidator ID="_RequireNeverUsed" runat="server" ErrorMessage="*" ControlToValidate="_TxtNeverUsed"></asp:RequiredFieldValidator>
    </div>
     < asp:Button ID = " btnValidator "  runat = " server "  Text = " 验证动态控件 "  Enabled = " true "   />
    
     </ form >
</ body >
</ html >