The length of the string exceeds the value set on the maxJsonLength property. in MVC3

Question

MVC3 (.cshtml File)

$.getJSON(URL, Data, function (data) {

                    document.getElementById(\'divDisplayMap\').innerHTML = data;

                            


        

Answer 1

You could write a custom ActionResult which will allow you to specify the maximum length of data that the serializer can handle:

public class MyJsonResult : ActionResult
{
    private readonly object data;
    public MyJsonResult(object data)
    {
        this.data = data;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        var response = context.RequestContext.HttpContext.Response;
        response.ContentType = "application/json";
        var serializer = new JavaScriptSerializer();
        // You could set the MaxJsonLength to the desired size - 10MB in this example
        serializer.MaxJsonLength = 10 * 1024 * 1024;
        response.Write(serializer.Serialize(this.data));
    }
}

and then use it:

public ActionResult ZoneType_SelectedState(int x_Id, int y_Id)
{
    string data = "LongString";//Longstring with the length mention below;
    return new MyJsonResult(data);
}

Answer 2

Try to update your Controller method as shown below:

public JsonResult ZoneType_SelectedState(int x_Id, int y_Id)
{
    var result = Json("LongString", JsonRequestBehavior.AllowGet);
    result.MaxJsonLength = int.MaxValue;
    return result;
}

Hope this helps...