Hi,

I have a webform where I am performing ajax call using jquery.

My code executes webmethod successfully and fills the data into a list item and returning that list. But on ajax success call it throughs the below error HTTP/1.1 500 Internal Server Error 37ms.

I google it out but unable to figure it out.

Please help me understand and resolve this.

Any suggestions will be appriciated. Below is my code

            $.ajax({
                type: "POST",
                url: "ManPowerEntry.aspx/getProjectNames",
                dataType: "json",
                contentType: "application/json",
                success: function (result, status) {
                    alert("result");
                    $("#ddlProject").empty();
                    $("#ddlProject").append($("<option value='0'> --Select Project--</option>"));
                    $.each(result.d, function (key, value) {
                        $("#ddlProject").append($("<option></option>").val(value.projectCode).html(value.projectName));
                    });
                    $('.autofilter').fSelect();
                },
                error: function ajaxError(result) {
                    alert(result.status + ' : ' + result.statusText);
                }
            });

        [WebMethod]
        public static List<ProjectManPower> getProjectNames()
        {
            string query = "select project_code, project_name from ProjectMaster";
            DataTable dt = SqlConn.SqlExce.fillDataTableRet(query);
            List<ProjectManPower> lsts = new List<ProjectManPower>();
            foreach (DataRow dr in dt.Rows)
            {
                lsts.Add(new ProjectManPower
                {
                    projectCode = dr["project_code"].ToString(),
                    projectName = dr["project_name"].ToString()
                });
            }
            return lsts;
        }