Webmethod does not fire

Question

I download a source code, and I tried it in Visual Studio 2013, and it didn't work, but it works when I use Visual Studio 2010, which I think there is a trick in ASP.Net 4.5 that I don't know about. Here is the code:

function Load(Skip, Take) {
            $('#divPostsLoader').html('<img src="../ProgressBar/ajax-loader.gif">');

            //send a query to server side to present new content
            $.ajax({
                type: "POST",
                url: "/Grid/LoadImages",
                data: "{ Skip:" + Skip + ", Take:" + Take + " }",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {                        
                    if (data != "") {
                        $('.thumb').append(data.d);
                    }
                    $('#divPostsLoader').empty();
                }
            })

        };

And this is the Webmethod that never run:

[WebMethod(EnableSession = true)]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static string LoadImages(int Skip, int Take)
{
    System.Threading.Thread.Sleep(2000);
    StringBuilder GetImages = new StringBuilder();
    string Imagespath = HttpContext.Current.Server.MapPath("~/Images/");
    string SitePath = HttpContext.Current.Server.MapPath("~");
    var Files = (from file in Directory.GetFiles(Imagespath) select new { image = file.Replace(SitePath, "") }).Skip(Skip).Take(Take);
    foreach (var file in Files)
    {
        var imageSrc = file.image.Replace("\\","/").Substring(1); //Remove First '/' from image path
        GetImages.AppendFormat("<a>");
        GetImages.AppendFormat("<li>");
        GetImages.AppendFormat(string.Format("<img src='{0}'/>", imageSrc));
        GetImages.AppendFormat("</li>");
        GetImages.AppendFormat("</a>");


    }
    return GetImages.ToString();
}

Any suggestion?

Thanks.

Answer 1

Have you tried stepping through your javascript? I bet you're getting a 500 error.

UPDATE

OP is getting 401 unauthorized when the AJAX request tries to call the WebMethod.

Once you allow authentication, you have to set AutoRedirectMode = RedirectMode.Off in your AppStart/RouteConfig.cs.

See more here