Error The length of the string exceeds the value set on the maxJsonLength property

Question

I am currently have a grid with PDF attachment. Each PDF can have file size up to 1MB. The problem is I am getting the value "Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property"

I already placed the following in the web.config but the problem is it works only if the Kendo UI Grid needs to display 6 records.

<system.web.extensions>
    <scripting>
      <webServices>
        <jsonSerialization maxJsonLength = "2147483647"></jsonSerialization>
      </webServices>
    </scripting>
</system.web.extensions>

Solution

Based on the following link:

MaxJsonLength exception in ASP.NET MVC during JavaScriptSerializer

public ActionResult SomeControllerAction()
{
  var jsonResult = Json(veryLargeCollection, JsonRequestBehavior.AllowGet);
  jsonResult.MaxJsonLength = int.MaxValue;
  return jsonResult;
}

Comments

[Jason Foglia]

It would be nice that they set this up in config file so not to have to add the extra code here. Thanks!

[SPnL]

Hello ! Here I'm getting error of exceeded max length when I post request with above 600 length of array list in json. I'm passing all data to controller.