Jqgrid Master Detail不要发送适当的信息

我在这里搜索我的问题，并找到一些提示，但无论如何都不起作用，我的问题是:

在jqgrid javascript中，我发送setGridParam this: {url:'myurl/myfunction/'+ id, page:1, datatype:"json"}，但是，Jgqgrid仍然没有发送到我的控制器的Id来选择细节，它总是null.....我试了所有方法，但问题仍然存在，请帮助我。

这是我的Javascript:

<script type="text/javascript">
    jQuery(document).ready(function() {
        jQuery("#list").jqGrid({
        url: '/Master/GridData/',
            datatype: 'json',
            mtype: 'GET',
            colNames: ['Id', 'Descripción'],
            colModel: [
                        { name: 'Id', index: 'Id', width: 50 },
                        { name: 'Descripcion', index: 'Descripcion', width: 80, sortable: true, editable: true, edittype: "text", editoptions: { maxlength: "100"} }
                      ],
            pager: jQuery('#pager'),
            autowidth: true,
            rowList: [5, 10, 20, 50],
            sortname: 'Id',
            sortorder: "asc",
            viewrecords: true,
            caption: '<b>Listado de Masters</b>',
            onSelectRow: function(ids) {
                if (ids != null) {
                    var data = $("#list").getRowData(ids);
                    jQuery("#DetailList").setGridParam({ url: "/Master/DetailGridData/" + data.Id, page: 1, datatype: 'json' })
           .setCaption("<b>Details of Master : " + data.Descripcion+"</b>")
           .trigger('reloadGrid');
                }
            }
        }).navGrid(pager, { edit: false, add: false, del: false, refresh: true, search: false });
        jQuery("#DetailList").jqGrid
        ({
            height: 100,
            datatype: "json",
            colNames: ['Id', 'Descripción', 'Modelo'],
            colModel: [
                        { name: 'Id', index: 'Id', width: 50 },
                        { name: 'Descripcion', index: 'Descripcion', width: 80, sortable: true, editable: true, edittype: "text", editoptions: { maxlength: "100"} },
                        { name: 'Modelo', index: 'Modelo', width: 80, sortable: true, editable: true, edittype: "text", editoptions: { maxlength: "100"} }                            
                      ],
            rowNum: 5,
            rowList: [5, 10, 20],
            pager: jQuery('#DetailPager'),
            sortname: 'Id',
            viewrecords: true,
            sortorder: "desc"
        }).navGrid('#DetailPager', { add: false, edit: false, del: false, search: false });
    });
</script>

这里是我的控制器代码:

    public ActionResult GridData(string sidx, string sord, int? page, int? rows)
    {
        List<Master> ms = new List<Master>();
        ms = MasterRepository.GetAll().ToList<Master>();
        int pageIndex = Convert.ToInt32(page) - 1;
        int totalrecords = ms.Count();
        int totalpages = (int)Math.Ceiling((decimal)totalrecords / (decimal)rows);
        var jsonData = new
        {
            sidx = "Id",
            sord = "asc",
            page = 1,
            records = 25,
            rows = (
                    from ch in ms
                    select new
                    {
                        id = ch.Id,
                        cell = new string[] 
                            {
                                ch.Id.ToString(),
                                ch.Descripcion,
                            }
                    }).ToArray(),
        };
        return Json(jsonData, JsonRequestBehavior.AllowGet);
    }

    public ActionResult DetailGridData(string IdMaster, string sidx, string sord, int? page, int? rows)
    {
        int IdCh = Convert.ToInt32(IdMaster);
        IList<Detail> det = new List<Detail>();
        det = DetailRepository.GetByMaster(IdCh).ToList<Detail>();
        int pageIndex = Convert.ToInt32(page) - 1;
        int totalrecords = det.Count();
        var jsonData = new
        {
            sidx = "Id",
            sord = "asc",
            page = 1,
            records = 25,
            rows = (
                    from bah in det
                    select new
                    {
                        id = bah.Id,
                        cell = new string[] 
                            {
                                bah.Id.ToString(),
                                bah.Descripcion,
                                bah.Modelo                                   
                            }
                    }).ToArray(),
        };
        return Json(jsonData, JsonRequestBehavior.AllowGet);
    }
}
}