void UpdateControls()
{
var selection = GetSelection().Count();
currentDialog.EnableControl(ViewControl.AddButton, true);
currentDialog.EnableControl(ViewControl.Import, true);
currentDialog.EnableControl(ViewControl.EditButton, selection == 1);
currentDialog.EnableControl(ViewControl.DeleteButton, selection > 0);
currentDialog.EnableControl(ViewControl.Export, selection > 0);
currentDialog.SetCloseButtonText(selection == 1 ? "Use and close" : "Close");
}