如何从asp.net Web表单返回列表对象到ajax回调函数？

Question

I'm beginner in asp.net and write simple web application to show user any chart using highcharts tools, in highcharts need read data with ajax and for that purpose I write this code:

function FetchData() {
            var pData = [];
            pData[0] = $("#ddlyear").val();
            var jsonData = JSON.stringify({ pData: pData });
            $.ajax({
                type: "POST",
                url: "CS.aspx/GetDataBehzad",
                data: "",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess_,
                error: OnErrorCall_
            });
            function OnSuccess_(response) {
                var aData = response.d;
                alert(aData);
            }
            function OnErrorCall_(response) {
                alert("Whoops something went wrong!");
            }
            e.preventDefault();
        }

and in CS.aspx write this code:

[System.Web.Services.WebMethod]
        public List<int> GetDataBehzad()
        {

            List<int> list = new List<int>();
            list.Add(10);
            list.Add(100);
            return list;

        }

But when I run the application I get OnErrorCall function alert from ajax, how can I solve that? What is problem? thanks every one.

Answer 1

Let see this is not and complete answer but a direction to a result. Try something like returning Json/Xml result from the action WebMethod. I have tried with mvc it is working on my site. You just need to see if JsonResult/Similar something is by default supported in webform or just find a class library.

    public JsonResult   GetDataBehzad()
    {

        List<int> list = new List<int>();
        list.Add(10);
        list.Add(100); 
        return Json(list, JsonRequestBehavior.AllowGet); 

    }

Answer 2

Use [ScriptMethod(ResponseFormat = ResponseFormat.Json)] attribute.

Your method:

    [System.Web.Services.WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public List<int> GetDataBehzad()
    {

        List<int> list = new List<int>();
        list.Add(10);
        list.Add(100);
        return list;
    }

Answer 3

Make your Method "Static"

that is the only issue in your code

see below

[System.Web.Services.WebMethod]

public static List<int> GetDataBehzad()
{

    List<int> list = new List<int>();
    list.Add(10);
    list.Add(100);
    return list;
}