Hi all!

Help me with my problem,please. 

<script type="text/javascript">
$(document).ready(function () {

$.ajax({
type: "POST",
url: "WebServiceMonitoringLog.asmx/Stations",
data: "{}",
contentType: 'text/json;charset=UTF-8',
dataType: "json",
success: succ,
error: err
});
 

function err(data, request, status) {  alert('------\n' + data.responseText + '\n------'+'\n'+request+'\n'+status);}

function succ(data, status) {
jQuery("#addtree").jqGrid({
url: 'WebServiceMonitoringLog.asmx/Stations',
datatype: 'json',
mtype: "POST",
colNames: ['Id', 'Name', 'Coord'],
colModel: [
  {name: 'Id',index: 'Id',width: 20,editable: false,},
{name: 'Name',index: 'Name',width: 150,align: "left",editable: false,size: 100},
{name: 'Coord',index: 'Coord',width: 100,editable: false,}],
rowNum: 10,
rowList: [2, 5, 10, 15],
pager: '#pjmap',
sortname: 'Id',
sortorder: "desc",
viewrecords: true,
  jsonReader: {repeatitems: false},
width: 600,
caption: 'jqGrid demo',
  height: '100%',});
}
})

 </script>

Call err funtion,because parseerror json:

Webservice wrong generate json string?

[Web Service code]

using System;

....................

using System.Collections.Generic;

namespace Example
{

      class Station
      {
            public int Id{get;set;}
            public string Name{get;set;}
            public string Coord{get;set;}

            public Station()
            {
                        Id = 1;
                        Name = "st1";
                        Coord = "0;0";
            }

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
[System.Web.Script.Services.ScriptService]

public class WebServiceMonitoringLog : System.Web.Services.WebService
{

             [WebMethod]
            [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
            public string Stations()
            {

                  List<vStation> sl = new List<vStation>(DataManager.vStation.GetAllStation().Take(10));
                  List<Station> stl = new List<Station>();

                  for (int i = 0; i < sl.Count; i++)
                  {
                        stl.Add(new Station());
                        stl[i].Id = sl[i].StationId;
                        stl[i].Name = sl[i].NameStation;
                        stl[i].Coord = sl[i].Position.ToString();
                  }
                  var vsl = stl; 
                  var gridData = new
                                                {
                                                      total = 1,
                                                      page = 1,
                                                      records = vsl.Count,
                                                      rows = vsl,
                                                };

                  var jsonSerializer = new JavaScriptSerializer();
                  return jsonSerializer.Serialize(gridData);
            }

         }
      }
}

How to generate rigth json whithout

<?xml version="1.0" encoding="utf-8"?>

<string   xmlns =" http://tempuri.org/ " >

                    jsonstring

</string>