将int数组传递给Webservice

Question

I have an $.ajax call to a .NET web service, which in turn leverages a function in a DAL down to the Entity Framework. I think this will work, but the trouble is with passing the array of artist IDs. I have tried all sorts of crazy conversions from string arrays to int arrays, I've used Linq .Select and none of it works. I always get Cannot convert object of type System.String to type System.Int32[] or similar. I understand the error, I just don't know how to fix it.

This is my jQuery:

                var params = new Array();
                $('ul li img.selected').each(function (index) {
                    params.push($(this).attr('id'));
                });

                var d = $('#calendar').fullCalendar('getDate').format();

                var parameters = {
                    sessionHash: 'xxx',
                    start: d,
                    end: d,
                    artists: JSON.stringify(params)
                };

                $.ajax({
                    type: "POST",
                    url: "/ws.asmx/GetDatesForArrayOfArtists",
                    data: JSON.stringify(parameters),
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: (function Success(data, status) {
                        alert('hazzah!');
                    }),
                    error: (function Error(request, status, error) {
                        alert('poo botty bum smells');
                    })
                });

And this is my web service:

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public List<Calendar> GetDatesForArrayOfArtists(string sessionHash, DateTime start, DateTime end, int[] artists)
        {
            var u = UserObject.GetCurrentUser(sessionHash);

            //var ints = artists.Select(x => int.Parse(x.ToString())).ToArray();

            return CalendarObject.GetDates(u.ClientId, start, end, artists);
        }

I've left some of my commented out code in, just so people can see my lame attempts at fixing this. So, the basic question is, given the code above, how can I pass an array of integers to the web-service?

EDIT 1: Here are two screenshots of the browsers console, this may go a way to explain the problem:

Answer 1

In your trace artists is array of arrays of strings - [["4","5"]] . I think it should be [4,5] to work.

Consider changing adding parseInt to params.push($(this).attr('id')); and removing JSON.stringify .

Answer 2

Without knowing line numbers etc. of the problem you are having, perhaps this might help:

If it doesn't could you please update your question with exactly where your code fails (which line and/or method).

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public List<Calendar> GetDatesForArrayOfArtists(string sessionHash, 
                          DateTime start, 
                          DateTime end, 
                          string[] artists)
    {
        var u = UserObject.GetCurrentUser(sessionHash);

        return CalendarObject.GetDates(u.ClientId, 
                   start, 
                   end, 
                   artists.Select(artist => Integer.Parse(artist)).ToArray());
    }

Answer 3

A simple way is:

In javascript build a new array:

var myArray = new Array();
myArray.push([value1, value2, ...]);

In C# just create a ICollection parameter to get your matrix:

[WebMethod(EnableSession = true)]
public void MyMethod GetMatrixFromJavascript(System.Collections.ICollection myArray) { 
    ...
}