ajax - request error with status code 200 - ajax

Question

From client side, I wanna send some data to server and receive some <div> tags which responding from View (another controller).
My ajax code looks like this:
var sortTopic = function () {
var $list = [],
$address = '',
$formData = new FormData();
/* do something here to set value to $list and $address */
$formData.append('Category', $list);
$formData.append('Address', $address);
$formData.append('Tags', '[KM]');
$formData.append('Skip', 0);
$.ajax({
url: '/Topic/Sort',
type: 'POST',
data: $formData,
dataType: 'json',
contentType: false,
processData: false,
success: function (data) {
if (!data.success) {
$('.jumbotron').html(data.ex);
} else {
$('.jumbotron').html(data);
}
},
error: function (xhr) {
alert(xhr.status); //xhr.status: 200
}
});
};
In TopicController, action Sort was:
[AllowAnonymous]
[HttpPost]
public ActionResult Sort(SortTopicViewModel model)
{
try
{
if (model.IsValidSortTopicModel())
{
return PartialView("../Home/_Timeline", new TopicMaster().Sort(model));
}
return Json(new { success = false, ex = "Invalid model." });
}
catch (Exception e) { return Json(new { success = false, ex = e.Message }); }
}
I'm sure that the model is valid and method new TopicMaster().Sort(model) was working fine (because I had put breakpoint to view the return data). And the partial view _Timeline is a partial view of HomeController.
My problem is: I don't understand why I get error with status code 200 in ajax:
error: function (xhr) {
alert(xhr.status); //xhr.status: 200
}
Can you explain to me?
Thank you!

Answer 1

as you told you receive <div> in response that is not json and you mention dataType:"json" in your ajax just remove it. this will solve your problem. error 200 occur when you did not get valid response which is you mention in ajax.
for mor information you can read it documentation