public string GetData()
 {
     BLL.TN_RealtimeMonitor realdata = new BLL.TN_RealtimeMonitor();
     //realdata.CoalCode = "300";
     //realdata.DevCode = "0-0";
     realdata.PageSize = 10;
     realdata.CurrentPageIndex = 1;
     return realdata.GetRecordsAndPager();
 }
        public string GetJson(string coalCode, string devType, string devName, string devState, string devCode, int currentPageIndex, int pageSize)
        {
            BLL.TN_RealtimeMonitor rtData = new BLL.TN_RealtimeMonitor();
            rtData.CoalCode = BulidCoals(coalCode);
            rtData.DevType = devType;
            rtData.DevState = devState;
            rtData.DevCode = devCode;
            rtData.CurrentPageIndex = currentPageIndex;
            rtData.PageSize = pageSize;

            return rtData.GetRecordsAndPager();
        }