extjs4中Ext.toolbar.Paging分页工具栏控件

[Js]
    var store = Ext.create('Ext.data.Store', {
        fields: ['IntData', 'StringData', 'TimeData'],
        pageSize: 15,
        proxy: {
            type: 'ajax',
            url: 'PagingToolbar1Json',
            reader: {
                type: 'json',
                root: 'rows',
                totalProperty: 'results'
            }
        },
        autoLoad: true
    });

[C# Mvc]
        public JsonResult PagingToolbar1Json(int start, int limit)
        {
            var json = new
            {
                results = BasicData.Table.Count,
                rows = BasicData.Table.Skip(start).Take(limit).Select(x => new
                {
                    IntData = x.IntData,
                    StringData = x.StringData,
                    TimeData = x.TimeData.ToShortDateString()
                })
            };
            return Json(json, JsonRequestBehavior.AllowGet);
        }