dan dan - 3 months ago 14
JSON Question

What causes $.ajax to result a full post-back

Could someone tell me what causes a $.ajax 'POST' request to result a full post-back (full page refresh)?

I'm using the $.ajax 'POST' in the ASP.NET MVC context, where the view is calling the controller method (which returns a JSON result) through a $.ajax 'POST' request.

The code is below.




// View.
<button id="save" onclick="saveClick()" />





// View.
<script type="text/javascript">

function saveClick() {
if (!$("form").valid()) {
return false;
}

$.ajax({
url: '@Url.Action(@MVC.Ticket.ActionNames.SaveTicket, @MVC.Ticket.Name)'
type: 'POST',
data: JSON.stringify(getJsonTicket()),
dataType: 'json',
contentType: "application/json",
cache: false,
success: function(data) {
alert(data.SaveResult);
}
});

return true;
}

function getJsonTicket() {
...
}

</script>





// Controller action.
public virtual JsonResult SaveTicket(Ticket newTicket)
{
try
{
TicketManager.SaveTicket(newTicket);
return Json(new CreateTicketViewModel {SaveResult = "success"});
}
catch
{
return Json(new CreateTicketViewModel { SaveResult = "error" });
}
}

Answer

Do

<button id="save" type="button" onclick="saveClick()" />

to make sure form is not posted by this button.

Explanation:

The default value for the type attribute of button elements is "submit".

http://stackoverflow.com/a/3315016/1014281