C # MVC Application_Error global error processing (including Ajax request)

Global error handling in the Global.asax Application_Error MVC's.

If the error when the request object creation yet to come, this time == Context.Handler null .

Ajax request when it is determined, we return Json string objects. When Ajax is not a request, go to the error page is displayed.

///  <Summary> 
/// the global error
 ///  </ Summary> 
///  <param name = "SENDER"> </ param> 
///  <param name = "E"> </ param> 
protected  void the Application_Error ( Object SENDER, EventArgs E) 
{ 
    Exception EX = the Server.GetLastError (); 
    LogHelper.Error (EX); // log errors (NLog with very good (* ¯)¯)) 

    IF (== Context.Handler null ) 
    { 
        return ; 
    } 

    IF ( new new HttpRequestWrapper (the Request) .IsAjaxRequest ()) 
    { 
        Response.Clear();
        the Response.ContentType  = " file application / JSON; charset = UTF-. 8 " ; 
        Response.Write ( " {\" State \ ": \" 0 \ ", \" MSG \ ": \" " + ex.Message + " \ "} " ); 
        the Response.Flush (); 
        Response.End (); 
    } 
    the else 
    { 
        // embodiment a redirected to an error page, take the simple error
         // String errurl = "? / error / error MSG =" + ex.Message;
         // Response.Redirect (errurl, to true); 

        // Option II band error object, goes to the error page 
        Response.Clear ();
        RouteData routeData = new RouteData();
        routeData.Values.Add ( " the Controller " , " Error " ); // existing controller error 
        routeData.Values.Add ( " Action " , " Error " ); // custom error pages 

        Server.ClearError () ; 
        ErrorController in Controller = new new ErrorController in (); 
        HandleErrorInfo handleErrorInfo = new new HandleErrorInfo (EX, " Error " , " Error " ); 
        the Controller.ViewData.Model  = handleErrorInfo;
        ((IController)controller).Execute(new RequestContext(new HttpContextWrapper(((MvcApplication)sender).Context), routeData));
    }
}

Option II which object usage, and the default error pages (ie /Shared/Error.cshtml) the same. When we do not deal with any errors in the web.config error page can be configured to /Shared/Error.cshtml.

Error.cshtml code:

@model System.Web.Mvc.HandleErrorInfo
@{
    ViewBag.Title = "系统错误";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h3 class="text-danger">系统错误</h3>
@if (Model != null)
{
    <span class="text-warning">@(Model.Exception.Message)</span>
}
else
{
    <span class="text-warning">处理请求时出错。</span>
}

Scheme II Action code:

public ActionResult Error()
{
    return View();
}