//若是在Web.config中配置数据源，如下<add key="ExcelConnectionString" value=http://www.mamicode.com/"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=‘miroExcel/Info.xls‘;Extended Properties=‘Excel 8.0;HDR=yes;IMEX=2‘"/>         /// <summary>        /// 读取Excel文件  传入绝对路径  查询条件        /// </summary>        /// <returns>DataSet</returns>        public DataSet GetBoolExcelDAL(string cardId, string excelPath)        {            try            {                string strCon = "Provider=Microsoft.Ace.OleDb.12.0; Data Source =‘" + excelPath + "‘;Extended Properties=‘Excel 12.0;HDR=yes;IMEX=2‘";                OleDbConnection Conn = new OleDbConnection(strCon);                string strsql = string.Format("select * from [Sheet1$] where CardId=‘{0}‘", cardId);                Conn.Open();                OleDbCommand oleCommand = new OleDbCommand(strsql, Conn);                OleDbDataAdapter oleAdapter = new OleDbDataAdapter(oleCommand);                DataSet ds = new DataSet();                oleAdapter.Fill(ds, "ExcelData");                if (ds != null)                {                    return ds;                }                else                {                    return null;                }            }            catch (Exception ex)            {                return null;            }