using 2 datetime picker date range in c# with mysql

cnn.cmdOpen(cmdForm);

                cmdForm.CommandText = " SELECT attendance.work,attendance.in_, attendance.out_,attendance.weekday,"

                    + "attendance.date,employee.Empname,employee.Empno"

                    + " FROM employee LEFT JOIN attendance ON employee.biomitricno = attendance.badgeno WHERE date BETWEEN '" + DtFrom.Value.ToString() + "' AND '" + DtTo.Value.ToString() + "';";

                MySqlDataAdapter da = new MySqlDataAdapter();

                da.SelectCommand = cmdForm;

                DataTable dtble = new DataTable();

                da.Fill(dtble);

                BindingSource bSource = new BindingSource();

                bSource.DataSource = dtble;

                dgVMonthly.DataSource = bSource;

                cmdForm.Dispose();

                cnn.cn.Close();