asp.net mvc HandleErrorAttribute 异常错误处理 无效！

系统未知bug，代码没有深究。 

现象：filters.Add(new HandleErrorAttribute()); 使用了全局的异常处理过滤。

HandleErrorAttribute 核心代码：

public virtual void OnException(ExceptionContext filterContext)    {      if (filterContext == null)      {        throw new ArgumentNullException("filterContext");      }      if (filterContext.IsChildAction)      {        return;      }      if (filterContext.ExceptionHandled || !filterContext.HttpContext.IsCustomErrorEnabled)      {        return;      }      Exception exception = filterContext.Exception;      if (new HttpException(null, exception).GetHttpCode() != 500)      {        return;      }      if (!this.ExceptionType.IsInstanceOfType(exception))      {        return;      }      get='_blank'>string controllerName = (string)filterContext.RouteData.Values["controller"];      string actionName = (string)filterContext.RouteData.Values["action"];      HandleErrorInfo model = new HandleErrorInfo(filterContext.Exception, controllerName, actionName);      filterContext.Result = new ViewResult      {        ViewName = this.View,        MasterName = this.Master,        ViewData = new ViewDataDictionary<HandleErrorInfo>(model),        TempData = filterContext.Controller.TempData      };      filterContext.ExceptionHandled = true;      filterContext.HttpContext.Response.Clear();      filterContext.HttpContext.Response.StatusCode = 500;      filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;    }

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原标题：asp.net mvc HandleErrorAttribute 异常错误处理 无效！

关键词：ASP.NET