Ajax undefined error when calling ASMX

Question

<html>
<script src="json.js";/>
<script src = "jquery.js"/>
<script type="text/javascript">
    function PopulateBlendSpecification() {


    var data = new Object();
    data.Message = "message";
    alert(JSON.stringify(data));
    $.ajax({
        url: "Test.aspx/Test",
        type: "POST",
        contentType: "application/json;charset=utf-8",
        dataType: "json",
        data: JSON.stringify(data),
        success: function (result) {
            var listItems = [];
            var blendSpecItems = JSON.parse(result.d);

            for (var key in blendSpecItems) {
                listItems.push('<option value="' + blendSpecItems[key].BlendSpecID + '">' + blendSpecItems[key].BlendName
                            + '</option>');
            }

            var lBox = $('select[id$=lbBlendSpecs]');
            $(lBox).append(listItems.join(''));
        }
    })
}

Test.aspx.cs

      [WebMethod()]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public  static string  Test(string message)
    {
       return message;
    }

This works fine when I try this within one project. However, when I move the webmethod into a separate prjoject within the same solution I get an ajax error:

Error in: http://localhost/Test/MyWebService/Test.asmx/Test
 error: undefined
 type: ajaxError
 readystate: 4
 status: 500

score 0 · Answer 1 · answered Jun 21 '14 at 13:35

0

Webmethod is case sensitive.In your code function is public static string Test(string message) in parameter message is in small letter and you have to pass data.Message M is capital so method is unable to find function in code side.

So if you change code like below your code will work fine

    [WebMethod()]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public static string Test(string Message)
    {
        return Message;
    }

answered Jun 21 '14 at 13:35

Pragnesh Khalas

2,908
2
13
26

I may have changed it in the post to get my point across. The example works ok, it fails when I move it to an ASMX service . – Robert Vogelezang Jun 21 '14 at 15:43

score 0 · Answer 2 · edited May 23 '17 at 11:57

0

when I move the webmethod into a separate prjoect within the same solution

Did you move it into a web service project and trying to consume in a web project, if that's the case this error would happen due to Cross site scripting restrictions. If you still need to have them in separate project, you will have to use jsonp and return jsonp friendly response.

You can find more info about JSONP + ASMX @JSONP & ASMX Web Service.

edited May 23 '17 at 11:57

Community

1
1

answered Jun 21 '14 at 13:35

Antony Francis

304
1
7

Yes, and I tried that avenue, I will look into it again. Or I might just move to WCF, i can't believe this simple task is so difficult to implement. – Robert Vogelezang Jun 21 '14 at 15:45

score 0 · Answer 3 · answered Jun 21 '14 at 13:39

0

do you have this header [System.Web.Script.Services.ScriptService] in your asmx file.

answered Jun 21 '14 at 13:39

Satz

105
9

No, I took that out because that prevents jQuery to do ajax requests. – Robert Vogelezang Jun 21 '14 at 15:46
actually that is used to make script to knoe about those existing methods.So please add it and try. – Satz Jun 23 '14 at 11:06

Ajax undefined error when calling ASMX

3 Answers3