Ajax results in 500 Internal Server Error because of large JSON

Question

I have a the following code

ajax call

$.ajax({
type: "POST",
dataType: "json",
async: false,
contentType: "application/json; charset=utf-8",
url: "Account/SomeFunc",
data: JSON.stringify(dataToSend),

success: function (res) {
//some code

},

error: function (res, textStatus, errorThrown) {
//some code

}
});

and on the server-side

public ActionResult SomeFunc()
    {
        //some code
        VeryBigObject result = getResult();

        if (result == null)
            return null;

        var jsonResult = Json(result, JsonRequestBehavior.AllowGet);
        jsonResult.MaxJsonLength = int.MaxValue;

        return jsonResult;
    }

result variable can be small but sometimes its a very big object. when the object is small enough the code works and the ajax success code is activated but when the result is big enough the code fails with 500 Internal Server Error. I cant put MaxJsonLength any bigger because its an int but sometimes I need to send some big data.. what can I do?

You need to check your server configuration max_post_size and increase it. — Mohit Tanwani, Oct 09 '16 at 16:57
Increase the `maxAllowedContentLength` in the `web.config` file. However, the default limit is 4Mb IIRC and you really, *really* shouldn't be sending that much JSON in a single request — Rory McCrossan, Oct 09 '16 at 16:58
This answer may helpful http://stackoverflow.com/a/1151993/4611027 — Syed Mhamudul Hasan, Oct 09 '16 at 17:13

score 2 · Answer 1 · edited Jun 10 '17 at 06:37

2

Use the code below in web.config. It will solve your problem.

<system.web.extensions>
    <scripting>
      <webServices>
        <jsonSerialization maxJsonLength="900000" />
      </webServices>
    </scripting>
 </system.web.extensions>

edited Jun 10 '17 at 06:37

answered Jun 10 '17 at 05:12

Siddesh

161
7

score 0 · Answer 2 · answered Oct 09 '16 at 20:14

0

Increasing maxJsonLength in Web config worked for me when I faced similar issues with large json data.

answered Oct 09 '16 at 20:14

inan

178
11

Ajax results in 500 Internal Server Error because of large JSON

2 Answers2