c# read data from .xsl

public void ReadExcel(HttpPostedFileBase file, string currentUserName)
        {

            DataTable tbContainer = new DataTable();
            string strConn = XlsConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + file.FileName +";Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
            string sheetName = "sheet1";
            FileInfo fileInfo = new FileInfo(file.FileName);
            OleDbConnection cnnxls = new OleDbConnection(strConn);
            OleDbDataAdapter oda = new OleDbDataAdapter(string.Format("select * from [{0}$]", sheetName), cnnxls);
            DataSet ds = new DataSet();
            oda.Fill(tbContainer);
            var newParcelTubeExport = new ParcelTubeExport();

            //your code to utilize the data

         }