/// <summary>
        /// 执行查询语句，返回SqlDataReader
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public static OleDbDataReader ExecuteReader(string SQLString, params OleDbParameter[] cmdParms)
        {
            NewsService.FileNews.File(connectionString);
            OleDbConnection connection = new OleDbConnection(connectionString);
            OleDbCommand cmd = new OleDbCommand();
            try
            {
                NewsService.FileNews.File("打开数据库链接");
                connection.Open();
                NewsService.FileNews.File("打开数据库链接1");
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                NewsService.FileNews.File("打开数据库链接2");
                OleDbDataReader myReader = cmd.ExecuteReader();
                NewsService.FileNews.File("打开数据库链接3");
                cmd.Parameters.Clear();
                return myReader;
            }
            catch (System.Data.OleDb.OleDbException e)
            {
                NewsService.FileNews.File(e.InnerException.ToString());
                throw new Exception(e.Message);
            }
        }