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up vote 4 down vote favorite
1

I have jQuery code to get JSON from the server:

 $(document).ready(function () {
            $.getJSON('Default2.aspx/GetPerson', { 'firstname': 'brian', 'lastname': 'lee' }, function (response) {
                alert(response.Age);
            });    
        });

Default2.aspx code :

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public static String GetPerson(String firstname, String lastname)
    {
        Person p = new Person(firstname, lastname);
        return "{\"Age\":\"12\"}";
    }

The question is :

Why GetPerson method is not called from my script? I attach the debugger in GetPerson but it seems doesn't called.

Any help would be appreciate!

share|improve this question
    
i am not sure if that is the reason, you could give the property name as data. data:{ 'firstname': 'brian', 'lastname': 'lee' } –  Runner Nov 25 '13 at 5:14
    
No, it doesn't work –  Iswanto San Nov 25 '13 at 5:15
    
stackoverflow.com/questions/16910982/…. i guess you need to get rid of the webmethod.as per this post, webmethods are obsolete –  Runner Nov 25 '13 at 5:26
    
I am using ASP.NET, not ASP MVC..:) –  Iswanto San Nov 25 '13 at 5:34
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1 Answer

up vote 4 down vote accepted

WebMethods by default respond to POST rather than GET requests.

$.ajax({
    type: 'POST',
    url: 'Default2.aspx/GetPerson',
    dataType: 'json',
    // ...
});

And, the request format should be JSON as well to match the ResponseFormat:

// ...
    data: JSON.stringify({ 'firstname': 'brian', 'lastname': 'lee' }),
    contentType: 'application/json'

Alternatively, a ScriptMethod can be configured to use GET instead:

[ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = true)]

Though, contentType still needs to be set for it, so $.getJSON() can't be used:

$.ajax({
    type: 'GET',
    url: 'Default2.aspx/GetPerson',
    dataType: 'json',
    contentType: 'application/json',
    // ...
});

And, data will be URL-encoded, but each value will need to be JSON-encoded before that:

// ...
    data: {
        firstname: JSON.stringify('brian'),
        lastname: JSON.stringify('lee')
    }

Also note that ScriptMethods will wrap their response in a { "d": ... } object. And, since the return value is a String, the value of "d" be that same unparsed String:

// ...
    success: function (response) {
        response = JSON.parse(response.d);
        alert(response.Age);
    }
share|improve this answer
    
You said WebMethods by default respond to POST rather than GET requests.. So how can i set WebMethod respond to GET? –  Iswanto San Nov 25 '13 at 6:14
    
@IswantoSan It is possible, though with some caveats. See my edit. –  Jonathan Lonowski Nov 25 '13 at 6:54
    
Thank you so much! –  Iswanto San Nov 25 '13 at 7:28
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