export data from excel sheets to sql tables

 OleDbConnection con = null;
string connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\testExcel.xls;Extended Properties='Excel 8.0;HDR=YES;'";

con = new OleDbConnection(connectionString);
            con.Open();

            if (con.State == ConnectionState.Open)
            {
                OleDbCommand cmd = con.CreateCommand();
                cmd.CommandText = "Select * from [Sheet1$]";
                cmd.CommandType = CommandType.Text;
                
                OleDbDataAdapter da = new OleDbDataAdapter(cmd);
                DataTable table = new DataTable();

                da.Fill(table);
            }