问个updatepanel和验证控件配合的问题

xiyushuo 2010-02-01 11:05:05

前台：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<asp:UpdatePanel ID="UpdatePanel2" UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox2" runat="server" Height="29px"></asp:TextBox>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<br />
<br />
<asp:UpdatePanel UpdateMode="Conditional" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:CustomValidator ID="CustomValidator1" runat="server"
ControlToValidate="TextBox1" ErrorMessage="dddd" Text="aaaaa"
onservervalidate="CustomValidator1_ServerValidate" ValidateEmptyText="True"></asp:CustomValidator>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button2" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="Button" />
</div>
</form>
</body>
</html>

后台

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
Session["a"] = "aa";
TextBox2.Text = "sda";
//Response.Redirect("Default2.aspx", true);
int a = 2;
}

catch (Exception)
{

Session["a"] = "bb";
}

}
protected void Button2_Click(object sender, EventArgs e)
{

}
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{

if (TextBox1.Text == "")
args.IsValid = false;
else
args.IsValid = true;
}
}

问题，当点击按钮2的时候，验证触发，红字显示，但当点击按钮1时候，红字消失，我如何能让红字保持呢？要求就是2个按钮各管各的updatepanel 互不相干

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