void Application_Error(object sender, EventArgs e)
{
    Exception objErr = Server.GetLastError().GetBaseException();
    string error = "发生异常页: " + Request.Url.ToString() + "br>";
    error += "异常信息: " + objErr.Message + "br>";
    Server.ClearError();
    Application["error"] = error;
    Response.Redirect("~/ErrorPage/ErrorPage.aspx");
}

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

!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>ErrorPage/title>
script language="javascript" type="text/javascript">
function CheckError_onclick() {
var chk = document.getElementById("CheckError");
var divError = document.getElementById("errorMsg");
if(chk.checked)
{
    divError.style.display = "inline";
}
else
{
    divError.style.display = "none";
}}
 /script>
/head>
body>
form id="form1" runat="server">
div style="text-align: center">
asp:Label ID="Label1" runat="server" Text="頁面出錯了" Style="text-align: center">/asp:Label>br/>
input type="checkbox" id="CheckError" onclick="CheckError_onclick()" />查看詳細信息br/>br/>
/div>
div id="errorMsg" style="text-align: center; display:none" runat="server">
asp:Label ID="ErrorMessageLabel" runat="server" Text="">/asp:Label>br />
 /div>
/form>
/body>
/html>

protected void Page_Load(object sender, EventArgs e)
{
ErrorMessageLabel.Text = Application["error"].ToString();
}