请教一个有关jquery插件Flexigrid的问题

 $('#flexigridtable').flexigrid({
                url: 'GetFlexigridData.ashx',
    dataType: 'json',
                colModel : [
{ display: 'productId', name: 'productId', width: 60, sortable: true, align: 'center' },
{ display: 'productlistName', name: 'productName', width: 60, sortable: true, align: 'center' },
{ display: 'specification', name: 'specification', width: 140, sortable: true, align: 'left' },
{ display: 'merchantCode', name: 'merchantCode', width: 120, sortable: true, align: 'left' },
{ display: 'sellingStore', name: 'sellingStore', width: 130, sortable: true, align: 'left', hide: false },
{ display: 'priceRange', name: 'priceRange', width: 80, sortable: true, align: 'right' },
                { display: 'repertory', name: 'repertory', width: 80, sortable: true, align: 'right' },
                { display: 'updateTime', name: 'updateTime', width: 80, sortable: true, align: 'right' }
]
               
            });

上面是我的js代码。

 public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            DataModelDataContext db = new DataModelDataContext();
            List<Products> list = db.Products.ToList();
            string jsonStr = JsonConvert.SerializeObject(list);
            context.Response.Write(jsonStr);
        }

上面是我的后台取数据代码，是asp.net的一般处理程序，返回的数据是json字符串，如下：

[{"productId":1,"productName":"ipad","specification":"黑色 8G","merchantCode":"Y001201","sellingStore":"淘宝一电（80）","priceRange":"4000～5000","repertory":80,"updateTime":"2013-06-21T17:06:39.547"},
{"productId":2,"productName":"iphone","specification":"黑色 8G","merchantCode":"Y101201","sellingStore":"拍拍一店（60）","priceRange":"3500～4000","repertory":80,"updateTime":"2013-06-21T17:07:46.913"},
{"productId":3,"productName":"ipad","specification":"黑色 8G","merchantCode":"Y001201","sellingStore":"淘宝一电（80）","priceRange":"4000～5000","repertory":80,"updateTime":"2013-06-21T17:06:39.547"}]

我的问题是为什么前台不显示我的数据内容：


只有一个表头，是不是我的数据格式不对？ flexigrid
[解决办法]
http://blog.csdn.net/cuishaofeng/article/details/6311427