public string QueryParameter(Parametersrc p)
        {
            string json = string.Empty;
            try
            {
                paraMgr = new ParameterMgr(connectionString);
                json = paraMgr.QueryBindData(p);
            }
            catch (Exception ex)
            {
                Log4NetCustom.LogMessage logMessage = new Log4NetCustom.LogMessage();
                logMessage.Content = string.Format("TargetSite:{0},Source:{1},Message:{2}", ex.TargetSite.Name, ex.Source, ex.Message);
                logMessage.MethodName = System.Reflection.MethodBase.GetCurrentMethod().Name;
                log.Error(logMessage);
            }
            return json;

        }