In MVC, how to determine if partial view response was valid (on the client side)?
[SomeController.cs]
public class SomeController : Controller
{
    public ActionResult ShowForm()
    {
        return View();
    }
    public ActionResult ValidateForm(MyFormModel FormModel)
    {
        FormValidationResults result = new FormValidationResults();
        result.IsValid = ModelState.IsValid;
        if (result.IsValid)
        {
            result.RedirectToUrl = "/Controller/Action";
        }
        this.Json(result);
    }
}

[FormValidationResult.cs]
public class FormValidationResults
{
    public bool IsValid { get; set; }
    public string RedirectToUrl { get; set; }
}

[View.js]
$(document).ready(function()
{
    $("#button").click(function()
    {
        var form = $("#myForm");
        $.ajax(
        {
            url: '/Some/ValidateForm',
            type: 'POST',
            data: form.serialize(),
            success: function(jsonResult)
            {
                if (jsonResult.IsValid)
                {
                    window.location = jsonResult.RedirectToUrl;
                }
            }
        });
    });
});

@if (String.IsNullOrWhiteSpace(Layout))
{
  // Do somthing if it is partial view
}
else
{
     // Do somthing if it is full page view
}