How to call void non static function by ajax?

Question

How to call a non static void function from ajax.I am getting a error. This is ajax code:-

    $('#button2 button').click(function () {

              $.ajax({
                type: "POST",
                url: "practiced_final.aspx/display",
                data: "{}",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                async: true,
                cache: false,
                success: function () 
                {
                },
                error: function (a, b, c) {
                    alert(a + b + c);
                }
            })
                                return false;

           });

This is C# method code:

      [WebMethod]
 protected  void display()
    {

    HttpContext.Current.Response.Write( "Hello");
    }

This is error message:-

[object XMLHttpRequest]errorundefined

What i am missing?

Please help.

Thank you.

add attribute to your method `display` `[Webmethod]`. I'm not sure if this method of yours should be public or not — Harry89pl, Sep 05 '12 at 10:29
i had already added it but didn't paste here.i still didn't work. check updated code. — user1627138, Sep 05 '12 at 10:32
see this [http://stackoverflow.com/questions/1360253/call-non-static-method-in-server-sideaspx-cs-from-client-side-use-javascript] related question which should solve your question — Pilgerstorfer Franz, Sep 05 '12 at 10:36

kleinohad · Answer 1 · 2012-09-05T10:44:32.783

2

for it to work your function must be static, it should look like this:

[Webmethod]
public static void display()
{
     HttpContext.Current.Response.Write( "Hello");
}

if you want your function to return a string you should change it to:

[Webmethod]
    public static string display()
    {
         return "Hello";
    }

edited Sep 05 '12 at 10:44

answered Sep 05 '12 at 10:34

kleinohad

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it still gives error:- [object XMLHttpRequest]parsererrorundefined – user1627138 Sep 05 '12 at 10:36
Maybe because the thing you return is not JSON. – Stilgar Sep 05 '12 at 10:38
you can't use HttpContext.Current.Response.Write in your function because it's void it shouldn't return any thing – kleinohad Sep 05 '12 at 10:42
@kleinohad i use breakpoint.The control goes to the function but at its exit from body ,a alert box appears which says:_ [object XMLHttpRequest]parsererrorundefined – user1627138 Sep 05 '12 at 10:44
Then how can i print message if i can't use HttpContext.Current.Response. – user1627138 Sep 05 '12 at 10:53

How to call void non static function by ajax?

1 Answers1