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请高手指点，初学ajax，ie提示出错：'Sys.WebForms.PageRequestManagerServerErrorException:...404

时间：2007-09-17

来源：互联网

<%@ Page Language= "C# " AutoEventWireup= "true " CodeFile= "Default.aspx.cs " Inherits= "_Default " %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN " "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd ">
<html xmlns= "http://www.w3.org/1999/xhtml ">
<head runat= "server ">
<title> Untitled Page </title>
</head>
<body topmargin = "0 ">
<form id= "form1 " runat= "server " >
<asp:ScriptManager ID= "ScriptManager1 " runat= "server " />
<asp:UpdatePanel ID= "UpdatePanel1 " runat= "server " UpdateMode= "Conditional ">
<ContentTemplate>
  <asp:Label ID= "Label1 " runat= "server " Text= "Label "> </asp:Label>
<%= DateTime.Now.ToString() %>
</ContentTemplate>
</asp:UpdatePanel>
<br />
<asp:Button ID= "Button1 " runat= "server " Text= "Button " OnClick= "Button1_Click1 " />   
</form>
</body>
</html>

using System;
using System.Data;
using System.Configuration;
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 _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ScriptManager1.RegisterAsyncPostBackControl(Button1);
}
protected void Button1_Click1(object sender, EventArgs e)
{
Label1.Text = "first ajax program! ";
UpdatePanel1.Update();
}
}

这个是书上的例子，可是怎么老是出错，google了一下，还是看不出哪里错了，请高手指点一下。

作者: littlespring 发布时间: 2007-09-17

错误提示： 'Sys.WebForms.PageRequestManagerServerErrorException: An uknown error occurred while processing the request on the server. The status code returned from the server was: 404.

作者: littlespring 发布时间: 2007-09-17

怎么错的啊？解决了么？我也是这个错误...

作者: nzg714944880 发布时间: 2011-11-22