void filterLoginTrail() { if (loginTrail.cmbEmployee.Text == "ALL" || String.IsNullOrWhiteSpace(loginTrail.cmbEmployee.Text)) { loginTrail.trailGrid.DataSource = dbController.filterLoginTrail(new DataTable(), loginTrail.dtPicker.Value); } else { loginTrail.trailGrid.DataSource = dbController.filterLoginTrailUserAndDate(new DataTable(), loginTrail.cmbEmployee.Text, loginTrail.dtPicker.Value); } }