private void officeNavigationBar1_SelectedItemChanged(object sender, DevExpress.XtraBars.Navigation.NavigationBarItemEventArgs e) { if (officeNavigationBar1.SelectedItem == navList) { gridControl1.MainView = gridView1; } else if (officeNavigationBar1.SelectedItem == navCards) { gridControl1.MainView = layoutView1; } else { ReportForm form = new ReportForm(); form.Show(); } }