Returning Json object from controller action to jQuery

Question

I'm attempting to get this working properly (2 days now). I'm working on a log in where I'm calling the controller action from jQuery, passing it a JSON object (utilizing json2.js) and returning a Json object from the controller. I'm able to call the action fine, but instead of being able to put the response where I want it it just opens a new window with this printed on the screen:

{"Message":"Invalid username/password combination"}

And the URL looks like http://localhost:13719/Account/LogOn so instead of calling the action and not reloading the page it's taking the user to the controller, which isn't good.

So now for some code, first the controller code

[HttpPost]
public ActionResult LogOn(LogOnModel model, string returnUrl = "")
{
    if (ModelState.IsValid)
    {
        var login = ObjectFactory.GetInstance<IRepository<PhotographerLogin>>();

        var user = login.FindOne(x => x.Login == model.Username && x.Pwd == model.Password);

        if (user == null)
            return Json(new FailedLoginViewModel { Message = "Invalid username/password combination" });
        else
        {
            if (!string.IsNullOrEmpty(returnUrl)) 
                return Redirect(returnUrl);
            else 
                return RedirectToAction("Index", "Home");
        }
    }
    return RedirectToAction("Index", "Home");
}

And the jQuery code

$("#signin_submit").click(function () {
    var login = getLogin();
    $.ajax({
        type: "POST",
        url: "../Account/LogOn",
        data: JSON.stringify(login),
        dataType: 'json',
        contentType: 'application/json; charset=utf-8',
        error: function (xhr) {
            $("#message").text(xhr.statusText);
        },
        success: function (result) {

        }
    });
});

function getLogin() {
    var un = $("#username").val();
    var pwd = $("#password").val();
    var rememberMe = $("#rememberme").val();

    return (un == "") ? null : { Username: un, Password: pwd, RememberMe: rememberMe };
}

In case you need to see the actual login form here that is as well

<fieldset id="signin_menu">
    <div>
        <span id="message"></span>
    </div>
    <% Html.EnableClientValidation(); %>    
    <% using (Html.BeginForm("LogOn", "Account", FormMethod.Post, new { @id = "signin" }))
        {%>

        <% ViewContext.FormContext.ValidationSummaryId = "valLogOnContainer"; %>
        <%= Html.LabelFor(m => m.Username) %>
        <%= Html.TextBoxFor(m => m.Username, new { @class = "inputbox", @tabindex = "4", @id = "username" })%><%= Html.ValidationMessageFor(m => m.Username, "*")%>
        <p>
        <%= Html.LabelFor(m=>m.Password) %>
        <%= Html.PasswordFor(m => m.Password, new { @class = "inputbox", @tabindex = "5", @id = "password" })%><%= Html.ValidationMessageFor(m => m.Password, "*")%>
        </p>
        <p class="remember">
        <input id="signin_submit" value="Sign in" tabindex="6" type="submit"/>
        <%= Html.CheckBoxFor(m => m.RememberMe, new { @class = "inputbox", @tabindex = "7", @id = "rememberme" })%>
        <%= Html.LabelFor(m => m.RememberMe) %>
        <p class="forgot"> <a href="#" id="forgot_password_link" title="Click here to reset your password.">Forgot your password?</a> </p>
        <p class="forgot-username"> <a href="#" id="forgot_username_link" title="Fogot your login name? We can help with that">Forgot your username?</a> </p>
        </p>
        <%= Html.ValidationSummaryJQuery("Please fix the following errors.", new Dictionary<string, object> { { "id", "valLogOnContainer" } })%>
    <% } %>
</fieldset>

The login form is loaded on the main page with

<% Html.RenderPartial("LogonControl");%>

Not sure if that has any bearing on this or not but thought I'd mention it.

EDIT: The login form is loaded similar to the Twitter login, click a link and the form loads with the help of jQuery & CSS

Answer 1

Your action signature will look as follows:

public virtual JsonResult ActionName()
{
     var abcObj = new ABC{a=1,b=2};

     return Json(abcObj);
}

Answer 2

If you're using MVC 2, you have to return something like this :

return Json(your_object, JsonRequestBehavior.AllowGet);

I've found it here

For a different usage, here is my code.

JQuery :

$(document).ready(function () {
    $("#InputDate").live('click', function () {
        var date = $("#InputDate").val();
        if (date != "") {
            $.getJSON("/Home/GetNames",
                    { date: $("#InputDate").val() },
                    function (data) {
                        $("#ProviderName").empty();
                        // [...]
                        });
                    });
        }
    });
});

And C#

public JsonResult GetNames(string date)
 {
   List<Provider> list = new List<Provider>();
   // [...]
   return Json(list, JsonRequestBehavior.AllowGet);
}