jquery - How i can return 500 error in JSON format in ASP.NET MVC? -

when asp.net mvc throws exception, returns 500 error response type text/html- which, of course, invalid json.

i want respond ajax request expecting json error can receive , display user.

1. is possible return json http status code of 500?

2. when problem missing parameter, 500 error occurs before controller called - controller solution might not work. example leaving required parameter out in call action returns jsonresult, asp.net mvc sends client:

server error in '/' application. parameters dictionary contains null entry parameter 'id' of non-nullable type 'system.int32' method 'system.web.mvc.jsonresult edituser(int32, system.string, system.string, system.string, system.string, system.string, system.string, system.string, system.string)' in 'bhh'. optional parameter must reference type, nullable type, or declared optional parameter. parameter name: parameters

i'm using jquery; there better way handle this?

you use custom error handler filter:

public class ajaxerrorhandler : filterattribute, iexceptionfilter {     public void onexception(exceptioncontext filtercontext)     {         if (filtercontext.httpcontext.request.isajaxrequest())         {             filtercontext.exceptionhandled = true;             filtercontext.result = new jsonresult             {                 data = new { errormessage = "some error message" }             };         }     } } 

and decorate controller/actions calling through ajax or register global filter.

then when performing ajax request can test presence of error property:

$.getjson('/foo', function(result) {     if (result.errormessage) {         // went wrong on server     } else {         // process     } });