return JSON string from MVC controller

Question

I use the following code to send/receive an object to my mvc controller:

$.ajax({
url: _createOrUpdateTimeRecord,
data: JSON.stringify(data),
type: "POST",
//dataType: "json",
contentType: "application/json; charset=utf-8",
beforeSend: function () {
    $("#loading-overlay").show();
},
success: function (data2) {
    try {   // tried to parse it manually to see if anything changes.
        data2 = JSON.parse(data2);
    }
    catch (err) {

    }
},
error: function (xhr, ajaxOptions, thrownError) {
    alert(thrownError + 'xhr error -- ' + xhr.status);
}

});

On my mvc controller I have my JSON object as string so I don't need the .NET JavascriptSerializer and JsonResult.

My JSON string looks like:

data2 = "{title:'1111111',start:'2014-03-23T16:00:00.000',end:'2014-03-23T18:00:00.000',id:107,hdtid:1,color:'#c732bd',allDay:false,description:''}"

And I always get: "Invalid character"

I already tried to return a string and parse the JSON manually on client side. Therefore I used ContentResult as return type but with no success

    public class JsonStringResult : ContentResult
    {
        public JsonStringResult(string json)
        {
            Content = json;
            ContentType = "application/json";
        }
    }

What is the problem here? The JSON looks fine...

Cheers, Stefan

Answer 1

Just Try it Json Conrtroller

  public JsonResult fnname()
    {
        string variablename = "{title:'1111111',start:'2014-03-23T16:00:00.000',end:'2014-03-23T18:00:00.000',id:107,hdtid:1,color:'#c732bd',allDay:false,description:''}";
        return Json(variablename , JsonRequestBehavior.AllowGet);
    }

Jquery json passing

 $(document).ready(function() {
   $.post("/controllername/fnname", { }, function (result) {
      alert(result);
   }, "json");
 });

Answer 2

Your data2 is INVALID JSON string. It should be:

data2 = "{\"title\":\"1111111\",\"start\":\"2014-03-23T16:00:00.000\",\"end\":\"2014-03-23T18:00:00.000\",\"id\":107,\"hdtid\":1,\"color\":\"#c732bd\",\"allDay\":false,\"description\":\"\"}"

Read JSON standard here http://json.org

JSON is more strict than plain javascript, key has to be wrapped in double quote, and string has to be wrapped in double quote too, single quote is invalid.

Douglas Crockford designed strict format of JSON for reasons. http://www.yuiblog.com/blog/2009/08/11/video-crockford-json/

His home page has many valuable links too. http://javascript.crockford.com