private string GetLineDevices(HttpContext context)
        {
            string strJson   = string.Empty;
            string strLineId = context.Request.Params["LineId"];

            Data.DataHelper           dataHelper = new Data.DataHelper();
            Data.DeviceInfoCollection items      = dataHelper.GetSmallAssemblyLineDevices(strLineId);
            strJson = items.ToJsonString();

            return(strJson);
        }