string table0 = textBox1.Text.Trim();
                //string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+table0+";Extended Properties=Excel 8.0";
                string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =" + table0 + ";Extended Properties=\"Excel 8.0; HDR = No;IMEX=1\"" ;
                OleDbConnection myConn = new OleDbConnection(strCon);
                string strCom = " SELECT * FROM [sheet1$] ";
                myConn.Open();
                //打开数据链接，得到一个数据集
                OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myConn);
                //创建一个 DataSet对象
                //myDataSet = new DataSet();
                DataSet myDataSet = new DataSet();
                //得到自己的DataSet对象
                myCommand.Fill(myDataSet, "[sheet1$]");
                //数据绑定

                string adf1=myDataSet .Tables ["sheet1$"].Rows[2][5].ToString();


这样读取不了数据，为什么？