Popup form post prevent site from refresh - asp.net-mvc

Question

I have a kendo grid with a button in it. When the button is pressed it opens up a popup with a file-select input and a button so that the user can save a image. Im using a normal form with a submit button to post my form to my controller. Everything works fine the right data arrives to the controller but then the page refreshes. I just want the popup to close and the grid and the whole page behind the popup to just stay as it is. Here is my controller:
[HttpPost]
public ActionResult SaveData(HttpPostedFileBase file, string id)
{
iResourceModel.SaveData(file, file.FileName);
return null;
}
and my html form:
<div id="details-container">
<form action="/Home/SaveData" method="post" enctype="multipart/form-data">
<span>Select file:</span><input type="file" name="file" id="file">
<input type="text" value=' + dataItem.ResourceId +' name="id" id="id" hidden/>
<button type="submit" id="" >Save file</button>
</form>
</div>

Answer 1

Page reloading after submitting a form is normal behavior. If you want to stop it, you can use jQuery and submit the form in the background.
You can find the jQuery form plugin here : http://plugins.jquery.com/form/
For your case :
<div id="details-container">
<form action="/Home/SaveData" method="post" enctype="multipart/form-data" id="myForm">
<span>Select file:</span><input type="file" name="file" id="file">
<input type="text" value=' + dataItem.ResourceId +' name="id" id="id" hidden/>
<button type="submit" id="" >Save file</button>
</form>
</div>
<script>
$(document).ready(function() {
$('#myForm').ajaxForm(function() {
alert("File uploaded!");
});
});
</script>