protected override object GetValue(string sSql)
        {
            string cn = string.Empty;

            if (string.IsNullOrEmpty(CnName))
            {
                cn = string.Empty;
            }
            else
            {
                cn = CnName.Split(new char[] { ',' })[0];
            }
            return(XSql.GetValue(cn, sSql));
        }
        //实现
        protected override int Execute(string sSql)
        {
            int iR = 0;

            if (string.IsNullOrEmpty(CnName))
            {
                iR = XSql.Execute(sSql);
                return(iR);
            }
            string[] cns = CnName.Split(new char[] { ',' });
            foreach (string cn in cns)
            {
                iR += XSql.Execute(cn, sSql);
            }
            return(iR);
        }