protected static DataTable GetDataTable(string fileName)        {            //execl 2003和2007以上的版本所用的引擎是不一样的            //excel2007,兼容2003                         //string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + " ;Extended Properties=Excel 8.0";//2003            //string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=‘Excel 12.0 Xml;HDR=YES;IMEX=1‘;";//2007以上            string strCon = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=‘Excel 12.0 Xml;HDR=YES;IMEX=1‘;";            DataSet ds = new DataSet();            using (OleDbConnection conn = new OleDbConnection(strCon))            {                string sql = "select * from [Sheet1$]";                OleDbCommand cmd = new OleDbCommand(sql, conn);                OleDbDataAdapter da = new OleDbDataAdapter(cmd);                da.Fill(ds);            }            return ds.Tables[0];        }