How do I call code behind method from ajax

Question

1.00/5 (2 votes)

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Hi -

Keeping it simple at first to start out with but not getting it to work. I'm trying to call code behind method using ajax. But my error that it is returning isnt descriptive and not sure what I'm doing wrong. Followed a few different articles and seems like I'm making it more difficult than it should be. Here is the code:

Here is the error : "{"Message":"Authentication failed.","StackTrace":null,"ExceptionType":"System.InvalidOperationException"}"

Ajax

 $(document).ready(function () {
    $.ajax({
        url: "Registration.aspx/GetData",
        type:"POST",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function (data) {
            $('#responseContent').text(data.d);
        }

    });
});

Here is the code behind:

C#

[WebMethod]
public static string GetData()
{
    return "Code behind string";
}

Posted 2-Dec-15 8:59am

Troy Bryant

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Comments

Snesh Prajapati 3-Dec-15 0:48am

In ajax method, you are using type:"POST" but you are not posting any data to GetData method. Verify in code whether you are making "GET" or "POST" call. Have a look at http://stackoverflow.com/questions/10653637/jquery-ajax-post-to-c-sharp

[no name] 3-Dec-15 1:10am

Firstly it is throwing authentication failed. It means server is authenticating something(users or machine key) which is not valid.

InvalidOperationException occurs when a method call is invalid for the object's current state.

http://stackoverflow.com/questions/28038732/getting-authentication-failed-system-invalidoperationexception-error-intermit

http://stackoverflow.com/questions/23033614/asp-net-calling-webmethod-with-jquery-ajax-401-unauthorized

Troy Bryant 3-Dec-15 8:25am

Actually the 3rd link pointed me in the right direction. Thank you

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 3-Dec-15 2:09am

Why don't you just go through some links suggested by Google?

yeleswarapu ramakrishna 3-Dec-15 14:29pm

code you have written works perfectly fine for me on my pc

yeleswarapu ramakrishna 3-Dec-15 14:32pm

hey you have not mentioned localhost in ur url pls check

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yeleswarapu ramakrishna · Answer 1 · 2015-12-03T08:40:00

HTML

<script type="text/javascript">
      function dream() {
          $.ajax({
              url: "http://localhost:8080/Registration.aspx/GetData",
              type: "POST",
              contentType: "application/json; charset=utf-8",
              dataType: "json",
              success: function (data) {
                  $('#responseContent').text(data.d);
              }
          });
      }
      dream();
  </script>