JQuery Ajax Post method not working with Sharepoint 2010 URL

Question

I'm trying to send some data to an aspx page by clickin on button but it doesn't seem to work by using jQuery Ajax Post ,however if I just chage the ajax type to GET it works fine ! but I do really want to make it with ajax post method since my transferred data size is really huge!

 $('#sendDataBtn').click(function () {
 selecteddata = document.getElementById("<%=textbox.ClientID%>").value; //might be over 1800 caracters
 $.ajax({
      url: '<%=SPContext.Current.Web.Url %>/_admin/CreateFilefromRecievedData.aspx',
      type: 'POST',
      dataType: 'text',
      data: { "data":selecteddata } ,
      headers: {
                "accept": 'application/x-www-form-urlencoded',
                "content-type": 'application/x-www-form-urlencoded',
                "X-RequestDigest": $("#__REQUESTDIGEST").val()
            }, //==> this fixed everything :)
      error: function () {
          alert("error");
      },
      success: function (data) {
         alert(data);
      }
 });

Answer 1

What does "doesn't seem to work" mean in your case?

Did you verify that the ajax post query is actually being sent (you can see that in your browser developer console).