/// <summary>检查参数是否存在</summary>
        /// <param name="varname">参数名</param>
        /// <returns></returns>
        private bool IsExist(string varname)
        {
            string strSql = "select * from sysconfig where varname='" + varname + "'";
            int    iCount = StaticValue.SelectTable(strSql).Rows.Count;

            if (iCount == 0)
            {
                return(false); //不存在
            }
            return(true);      //存在
        }
        /// <summary>系统参数设置。</summary>
        /// <param name="varname">参数名</param>
        public SystemConfig(int index, string varname)
        {
            if (!this.IsExist(varname))
            {
                this.Initialize();
                this.Insert(index);
            }
            string  strSql = "select * from sysconfig where varname='" + varname + "'";
            DataRow objRow = StaticValue.SelectTable(strSql).Rows[0];

            this.VarIndex = int.Parse(objRow["varindex"].ToString());
            this.VarName  = objRow["varname"].ToString();
            this.VarType  = objRow["vartype"].ToString();
            this.VarValue = objRow["varvalue"].ToString();
            this.VarInfo  = objRow["varinfo"].ToString();
        }