asp.net 异常处理

protected void Application_EndRequest(object sender, EventArgs e)
{
// 在应用程序关闭时运行的代码

 ???????HandlerError(); ???} ???private void HandlerError() ???{ ???????????????????if (HttpContext.Current != null) ???????{ ???????????if (string.IsNullOrEmpty(Request.QueryString["error"])) ???????????{ ???????????????var server = HttpContext.Current.Server; ???????????????var statusCode = HttpContext.Current.Response.StatusCode; ???????????????Exception ex = server.GetLastError(); ???????????????if (ex != null || statusCode == 404 || statusCode == 500) ???????????????{ ???????????????????server.ClearError(); ???????????????????Response.StatusCode = 404; ???????????????????Response.Redirect("//www.baidu.cn/nopage.html"); ???????????????????Response.End(); ???????????????????if (ex != null) ???????????????????????DependencyResolver.Current.GetService<ILog>().Log(ex); ???????????????} ???????????} ???????} ???} ???protected void Application_Error(object sender, EventArgs e) ???{ ???????// 在出现未处理的错误时运行的代码 ???????HandlerError(); ???}