How to read boolean value from json via JS

Question

I want read returned value from this method:

public ActionResult ClientIsBlocked(int? clientId)
{
    if (!clientId.HasValue)
        return Json(null);

    bool isBlocked = false;

    try
      {
         isBlocked = this.clientsProvider.GetClientById(clientId.Value).IsBlocked;
       }
    catch
       {
           // logg
       }
    return Json(isBlocked);
 }

in java script in my view. It should be async/ajax. How to do that? It is my js code in view.

function isBlocked(id) {
            $.ajax({
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                type: "GET",
                url: '@Url.Action("ClientIsBlocked", "CustomerManagement", new { Area = "CustomerManagement" })',
                data: JSON.stringify({ 'clientId': id }),
                success: function(data) {
                    if(!data.success) {

                    }
                }
            })

BTW, the try {} catch {} really should do something if it is the production code... Not just eating the exception. — Artyom
– Artyom, Commented Sep 2, 2015 at 11:44
The data inside your success should be boolean type, the isBlocked value. Just check this like this console.assert(typeof(data) == "boolean") — Artyom
– Artyom, Commented Sep 2, 2015 at 11:46
in your success function don't use data.suceess because data directly contains a boolean value of isBlocked property returned from server. Also return return Json(isBlocked,JsonRequestBehavior.AllowGet); form server as you are missing JsonRequestBehavior.AllowGet — Ankit K
– Ankit K, Commented Sep 2, 2015 at 11:49

Ehsan Sajjad · Accepted Answer · 2015-09-02 11:49:22Z

1

In your action change :

return Json(isBlocked);

to:

return Json(isBlocked,JsonRequestBehavior.AllowGet);

otherwise your ajax may fail throwing exception:

Server Error in '/' Application.

This request has been blocked because sensitive information could be disclosed to third party web sites when this is used in a GET request. To allow GET requests, set JsonRequestBehavior to AllowGet.

and in js in success callback:

success: function(data) {

           alert(data); // data is the bool that is returned by action
          }

answered Sep 2, 2015 at 11:49

Ehsan Sajjad

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