[英]The show() command doesn't open the window Wpf
我在應用程序啟動時運行以下方法,該方法首先顯示“維護”屏幕。 該方法運行后,我想顯示我的登錄屏幕。 但是,登錄屏幕沒有打開。 如果我注釋掉顯示維護屏幕的代碼,它會很好地工作。
private void Application_Startup(object sender, StartupEventArgs e)
{
ILocalDbDataService _locDataService =new LocalDbDataService();
Maintenance mWin = new Maintenance();
mWin.Show();
MaintenanceViewModel maintenanceViewModel = Microsoft.Practices.ServiceLocation.ServiceLocator.Current.GetInstance<MaintenanceViewModel>();
maintenanceViewModel.RunMaintenance();
Login lWin = new Login();
lWin.Show();//This windows doesn't open
}
public class MaintenanceViewModel : ViewModelBase
{
private readonly ILocalDbDataService _localDbDataService;
public MaintenanceViewModel(ILocalDbDataService localDbDataService)
{
_localDbDataService = localDbDataService;
}
public void RunMaintenance()
{
bool result= _localDbDataService.RunTransArchiveMaintenance();
MessengerInstance.Send(new NotificationMessage("CloseMaintenance"));
}
}
public partial class Maintenance : Window
{
public Maintenance()
{
InitializeComponent();
Messenger.Default.Register<NotificationMessage>(this, msg =>
{
if (msg.Notification == "CloseMaintenance")
{
this.Close();
}
});
}
}
在“維護”窗口的構造函數中,創建“登錄”窗口類的新實例,然后調用Show()。
public Maintenance (){
Login login=new Login ();
login.Show();
}
只需將其放在您的主窗口中即可。
<ContentControl x:Name="SomeName"
Grid.Row="1"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Content="{Binding CurrentScreen}" />
要更改時設置CurrentScreen用戶控件屬性
CurrentScreen = new MaintenancePage();
CurrentScreen = new LogInPage(); // LoginPage.xaml is your login view.
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