Increase json response maxJsonLength in MVC 4

Question

I am getting following error in razor view engine MVC4(.net 4.5) application when loading a large JSON response form server at

“Error during serialization or deserialization using the JSON JavaScriptSerializer.The length of the string exceeds the value set on the maxJsonLength property at @Html.Raw(Json.Encode(jsondata)”

I have tried by setting MaxJsonLength property in my web.config:

configuration> 
   <system.web.extensions>
       <scripting>
           <webServices>
               <jsonSerialization maxJsonLength="2147483644"/>
           </webServices>
       </scripting>
   </system.web.extensions>
</configuration> 

Tried following at server side while sending JSON response as well.

 return new JsonResult()
    {
        Data = data,
        ContentType = contentType,
        ContentEncoding = contentEncoding,
        JsonRequestBehavior = behavior,
        MaxJsonLength = Int32.MaxValue
    };

Also tried the solution listed hare: http://brianreiter.org/2011/01/03/custom-jsonresult-class-for-asp-net-mvc-to-avoid-maxjsonlength-exceeded-exception/. But nothing worked for me :(

Can some suggest me how to avoid this error or how to increase the Jason response max length?

Answer 1

Somehow I get rid of this error by using following code in view.

@{
System.Web.Script.Serialization.JavaScriptSerializer serializer = new System.Web.Script.Serialization.JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue;
}
<script type="text/javascript">
var entries = @Html.Raw(serializer.Serialize(Model.FeedEntries));    
</script>

This was not working at server side at least for me.

Answer 2

My penny to the solutions. Did b) because a) gave errormessage 'System.Web.Mvc.JsonResult does not contain a definition for maxJsonLength ... ' in Mvc 4.5 AFAIK, this is the only workaround that works.

I put b) in my controller. Hopefully this will help someone.

Regards, SM

a)

var jsonResult = Json(list, JsonRequestBehavior.AllowGet);
jsonResult.maxJsonLength = int.MaxValue;
return jsonResult;

b)

if (Request.IsAjaxRequest())
{
   //Working solution
   var serializer = new JavaScriptSerializer { MaxJsonLength = Int32.MaxValue, RecursionLimit = 100 };

   return new ContentResult()
   {
      Content = serializer.Serialize(list),
      ContentType = "application/json",
   };

   //Trial 2
   //var jsonResult = Json(list, JsonRequestBehavior.AllowGet);
   //jsonResult.maxJsonLength = int.MaxValue;
   //return jsonResult;

   //Trial 1
   //return Json(list, JsonRequestBehavior.AllowGet);
} 

Answer 3

This worked to me

   return new JsonResult()
            {
                Data=jsonData,
                MaxJsonLength = 86753090,
                JsonRequestBehavior=JsonRequestBehavior.AllowGet
            };