如何弹出窗口，而页面不刷新

用客户端控件，不要用服务器端控件。
不要用Response.Write()输出脚本

谢谢两位了，只是我想在对话框里显示的提示信息是动态的，不用服务器控件怎么实现？javascript吗，能不能给一个简单的例子，？

用客户端Label控件, 然后作为服务器端运行.DIV.InnerHtml = "<script>alert('......')</script>";

在一些.NET论坛中有人经常会问：如何在页面中点击按钮打开新页面，输入数据，然后返回到初始页面并进行更新？要解决这个问题，应该弄清楚window.showModalDialog()的用法，本人在http://www.csdn.net/Develop/read_article.asp?id=15113已经做过介绍。下面就用例子介绍如何在ASP.NET中实现这个功能。本例子共3个页面，其中WebForm2.aspx是过渡页面，是为了防止提交时打开新页面。WebForm1.aspx<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb"
Inherits="aspxWeb.mengxianhui.com.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
  <HEAD>
    <title>WebForm1</title>
    <meta content="Microsoft Visual Studio .NET 7.0" name="GENERATOR">
    <meta content="Visual Basic 7.0" name="CODE_LANGUAGE">
    <meta content="JavaScript" name="vs_defaultClientScript">
    <meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
  </HEAD>
  <body MS_POSITIONING="GridLayout">
    <div align="center">
      <form id="Form1" method="post" runat="server">
        <asp:label id="Label1" runat="server" Font-Bold="true">
从当前页面打开新窗口，并把变量传递到新窗口的例子，可以多次打开提交。
</asp:label><br>
        <br>
        <asp:textbox id="TextBox1" runat="server" Width="600px">这是初始值，将被传递到新窗口。</asp:textbox><br>
        <br>
        <asp:button id="Button1" runat="server" Text="打开窗口" Width="96px"></asp:button></form>
    </div>
  </body>
</HTML>WebForm1.aspx.vbPublic Class WebForm1
    Inherits System.Web.UI.Page
  Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
  Protected WithEvents Form1 As System.Web.UI.HtmlControls.HtmlForm
  Protected WithEvents Label1 As System.Web.UI.WebControls.Label
  Protected WithEvents Button1 As System.Web.UI.WebControls.Button#Region " Web 窗体设计器生成的代码 "  '该调用是 Web 窗体设计器所必需的。
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()  End Sub  Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
    'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
    '不要使用代码编辑器修改它。
    InitializeComponent()
  End Sub#End Region  Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    '在此处放置初始化页的用户代码
    If (Not IsClientScriptBlockRegistered("clientScript")) Then
      Dim strScript As String = "<script>" + vbCrLf
      strScript += "function OpenWin(){" + vbCrLf
      strScript += "var str=window.showModalDialog('WebForm2.aspx',document.Form1.TextBox1.value)" + vbCrLf
      strScript += "if(str!=undefined) document.Form1.TextBox1.value=str" + vbCrLf
      strScript += "}" + vbCrLf
      strScript += "</script>" + vbCrLf
      RegisterClientScriptBlock("clientScript", strScript)
    End If
    Button1.Attributes.Add("onclick", "OpenWin()")  End SubEnd ClassWebForm2.aspx<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm2.aspx.vb" Inherits="aspxWeb.mengxianhui.com.WebForm2"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
  <HEAD>
    <title>WebForm2</title>
    <meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.0">
    <meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
    <meta name="vs_defaultClientScript" content="JavaScript">
    <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
  </HEAD>
  <frameset rows="0,*">
    <frame src="about:blank">
    <frame src="WebForm3.aspx">
  </frameset>
</HTML>WebForm2.aspx.vbPublic Class WebForm2
    Inherits System.Web.UI.Page#Region " Web 窗体设计器生成的代码 "  '该调用是 Web 窗体设计器所必需的。
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()  End Sub  Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
    'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
    '不要使用代码编辑器修改它。
    InitializeComponent()
  End Sub#End Region  Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    '在此处放置初始化页的用户代码
  End SubEnd ClassWebForm3.aspx<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm3.aspx.vb" Inherits="aspxWeb.mengxianhui.com.WebForm3"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
  <HEAD>
    <title>WebForm3</title>
    <meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.0">
    <meta name="CODE_LANGUAGE" content="Visual Basic 7.0">
    <meta name="vs_defaultClientScript" content="JavaScript">
    <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
  </HEAD>
  <body MS_POSITIONING="GridLayout" id="MyBody" runat="server">
    <form id="Form1" method="post" runat="server">
      <asp:Label id="Label1" runat="server">请输入您的大名：</asp:Label><br>
      <br>
      <asp:TextBox id="TextBox1" runat="server" Width="558"></asp:TextBox><br>
      <br>
      <asp:Button id="Button1" runat="server" Text=" 提  交 "></asp:Button>
    </form>
  </body>
</HTML>WebForm3.aspx.vbPublic Class WebForm3
    Inherits System.Web.UI.Page
  Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
  Protected WithEvents Label1 As System.Web.UI.WebControls.Label
  Protected WithEvents Button1 As System.Web.UI.WebControls.Button
  Protected MyBody As System.Web.UI.HtmlControls.HtmlControl#Region " Web 窗体设计器生成的代码 "    '该调用是 Web 窗体设计器所必需的。
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()  End Sub    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: 此方法调用是 Web 窗体设计器所必需的
        '不要使用代码编辑器修改它。
        InitializeComponent()
    End Sub#End Region    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    '在此处放置初始化页的用户代码
    If IsPostBack Then
      Dim strScript As String = "<script>" + vbCrLf
      strScript += "window.parent.returnValue='" + TextBox1.Text.Replace("'", "\'") + "'" + vbCrLf
      strScript += "window.parent.close()" + vbCrLf
      strScript += "</script>" + vbCrLf
      If (Not IsClientScriptBlockRegistered("clientScript")) Then
        RegisterClientScriptBlock("clientScript", strScript)
      End If
    End If
    If Not IsPostBack Then
      MyBody.Attributes.Add("onload", "Form1.TextBox1.value=window.dialogArguments")
    End If
  End Sub
End Class

http://xml.sz.luohuedu.net/xml/ShowDetail.asp?id=49ML4AO8-5PB3-4KNY-NJZD-LJOIOXV4M1X4

给按钮加个属性，我给你 vb.net 的例子：
   在网页的 vb 文件中的 Page_Load 函数中加入：
      Me.ButtonAdd.Attributes.Add("onclick", "return DataAdd();")
   上面语句中的 DataAdd() 就是你在网页的 .aspx 文件中使用 javascript 写的函数，如果你不想刷新页面，只要在这个函数中返回 false 就可以了

将CausesValidation属性设置为False，然后在cs里写
mybutton.Attribute["onclick"]="javascript:window.open('xxx.aspx');return false;";

To:cyp503(谁怕？一蓑烟雨任平生)
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调试易

如何弹出窗口，而页面不刷新

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