在AJAX支持的网站中使用想使用Response.Wrie(“”); 或 Page. RegisterStartupScript (); 弹出一些提示对话框，没有效果。有如下两种解决方法：
（1） System.Web.UI.ScriptManager.RegisterStartupScript来替代Page.ClientScript.RegisterStartupScript
函数原型：
System.Web.UI.ScriptManager.RegisterStartupScript（Contrl control, Type type,string key,string script, bool addScriptTags）;参数：
control//要要注册此段javascript语句的控件ID,如下面示例的按钮ID btnUnReporttype//一般直接用this.GetType()即可key//为要执行的javascirpt语句起的名字，可以随便起，类似控件的name属性script//javascript语句addScriptTags//为true时，前边的script参数可以不用再写javascript标签；为false,则需自己为script参数添加<script language=’javascript’></script>标签。注：要多传一个Control参数，如果这个control在UpdatePanel里，则运行脚步，如果这个control不在UpdatePanel则不允许这段脚步。
Eg.
System.Web.UI.ScriptManager.RegisterStartupScript(btnUnReport, this.GetType(), "unReport", "alert('内容');window.close();", true);（2）注册DataItem方法：
示例：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="WebForm1.aspx.cs" Inherits="WebForm1" %>
<!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>
<script type="text/javascript">
Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(
function(sender, e)
{
var dataItem = e.get_dataItems()["<%= this.UpdatePanel1.ClientID %>"]();
alert(dataItem.Name);
});
</script>
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Button ID="test" runat="server" Text="test" OnClick="test_Click" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
<!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> <script type="text/javascript">
Sys.WebForms.PageRequestManager.getInstance().add_pageLoading(
function(sender, e)
{
var dataItem = e.get_dataItems()["<%= this.UpdatePanel1.ClientID %>"]();
alert(dataItem.Name);
});
</script>
<div> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:Button ID="test" runat="server" Text="test" OnClick="test_Click" /> </ContentTemplate> </asp:UpdatePanel> </div> </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;using System.Web.Script.Serialization; public partial class WebForm1 : System.Web.UI.Page{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void test_Click(object sender, EventArgs e)
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
ScriptManager.GetCurrent(this.Page).RegisterDataItem(this.UpdatePanel1, "var _f = function(){alert('Hello World!');}; _f;", true);
}
}
（3） 使用Javascript的非模态对话框弹出提示
Eg.
Page.RegisterStartupScript("alert", "<script language='javascript'>window.showModelessDialog(\"javascript:alert('内容');window.close();\",\"\",\"status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;\")</script>");