我使Jquery ajax调用c＃webservice方法，返回类型为void，而调用响应出错？

Question

我对返回的类型为 void 的 c＃Web服务方法进行了Jquery ajax调用，而调用响应变为错误，而不是成功。 有什么解决办法

这是代码，

jQuery ajax调用：

$.ajax({
        type: "POST",
        url: "~/MyWebService.asmx/SCheduleDetailsGet",
        data: Data,
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        //async: false,
        //global: false,
        success: function (response) {
            debugger;
        },
        error: function (data, xhr, error) {
            debugger;
            return false;
        }
    });

C＃Web服务方法：

[WebMethod]
        [ScriptMethod(UseHttpGet = false, ResponseFormat = ResponseFormat.Json, XmlSerializeString = false)]
        public void SCheduleDetailsGet(int LoginUserID,int ResumeSearchId,string Flag)
        {
            try
            {
                DataSet ds = new DataSet();
                ds = RHSCheduleGet(LoginUserID, ResumeSearchId, Flag);
                object _jsonReturn = null;
                object jSonString = null;
                System.Web.Script.Serialization.JavaScriptSerializer jSearializer =
                        new System.Web.Script.Serialization.JavaScriptSerializer();
                _jsonReturn = JsonConvert.SerializeObject(ds.Tables[0]);
                    _jsonReturn = "{\"aaData\":" + _jsonReturn + "}";
                Context.Response.Write(_jsonReturn);
            }
            catch (Exception ex)
            {
                Context.Response.Write("-2");
            }
        }