public VideoQueryForm() { InitializeComponent(); PopulateSearchScope(); setListViewColumns(); rand = new Random((int)DateTime.Now.Ticks); var now = DateTime.Now; this.timeTO.EditValue = now; this.timeFrom.EditValue = now.AddDays(-1); var videoNavigator = new NullNavigator(); this.controlNavigator1.NavigatableControl = videoNavigator; videoGrid.DataSource = _videos; //licenseplatesGrid.DataSource = _licensePlates; faceGalleryControl.Gallery.ItemCheckedChanged += Gallery_ItemCheckedChanged; _galleryGroup = new GalleryItemGroup(); faceGalleryControl.Gallery.Groups.Add(_galleryGroup); }