public static DataTable ExcelToDataTable(string strExcelFileName, string strSheetName)

        {

            //源的定义

            //string strConn = "Provider=Microsoft.Ace.OLEDB.12.0;" + "Data Source=" + strExcelFileName + ";" + "Extended Properties='Excel 12.0;HDR=YES;IMEX=1';";

            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + strExcelFileName + ";" + "Extended Properties='Excel 8.0;HDR=YES;IMEX=1';";

            //;

            //Sql语句

            //string strExcel = string.Format("select * from [{0}$]", strSheetName); 这是一种方法

            string strExcel = "select * from   [" + strSheetName + "$]";

            //定义存放的数据表

            DataSet ds = new DataSet();

            //连接数据源

            OleDbConnection conn = new OleDbConnection(strConn);

            conn.Open();

            //适配到数据源

            OleDbDataAdapter adapter = new OleDbDataAdapter(strExcel, strConn);

            adapter.Fill(ds, strSheetName);

            conn.Close();

            return ds.Tables[strSheetName];

        

        }