asp.net错误捕获(错误处理)page_error事件使用方法

<script language="C#" runat="server">
void Page_Load(object sender, System.EventArgs e)
{
// 引发“空引用”异常 keleyi.
throw (new ArgumentNullException());
}

protected void Page_Error(object sender, EventArgs e)
{
Exception objErr = Server.GetLastError().GetBaseException(); // 获取错误
string err = "1.error in: &nbsp; &nbsp; &nbsp;" + Request.Url.ToString() + "</br>" +
"2.error Message: &nbsp; &nbsp; &nbsp;" + objErr.Message.ToString() + "</br>" +
"3.stack Trace: &nbsp; &nbsp; &nbsp;" + objErr.StackTrace.ToString() + "</br>";
Response.Write(err.ToString()); //输出错误信息
// Response.Redirect("ErrorPage.htm"); //可以重定向到友好的错误页面
Server.ClearError();
}
</script>