WPF在主窗口之前显示对话框 [英] WPF showing dialog before main window

问题描述

如何在主窗口之前显示对话窗口（例如登录/选项等）？

这是我尝试的（显然曾经工作过，但不再是）：

XAML ：

 <应用程序... 
 Startup =Application_Startup> 
  

应用：

  public partial class App：Application 
 {
 private void Application_Startup（object sender，StartupEventArgs e）
 {
 Window1 myMainWindow = new窗口1（）; 
 DialogWindow myDialogWindow = new DialogWindow（）; 
 myDialogWindow.ShowDialog（）; 
} 
} 
  

结果：myDialogWindow是首先显示。当它被关闭时，Window1被显示为预期的。但是当我关闭Window1时，应用程序根本就不会关闭。

解决方案

>

在 App.xaml 中，我删除了 StartupUri 的东西，并添加一个启动处理程序：

 <应用程序x：Class =MyNamespace.App
 xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
 xmlns：x =http://schemas.microsoft.com/winfx/2006/xaml
 Startup =ApplicationStart> 
< / Application> 
  

在 App.xaml.cs 中，我按如下所示定义处理程序：

  public partial class App 
 {
 private void ApplicationStart（object sender，StartupEventArgs e）
 {
 //关闭对话框关闭
 Current.ShutdownMode = ShutdownMode.OnExplicitShutdown; 
 
 var dialog = new DialogWindow（）; 
 
 if（dialog.ShowDialog（）== true）
 {
 var mainWindow = new MainWindow（dialog.Data）; 
 //重新启用正常关机模式。 
 Current.ShutdownMode = ShutdownMode.OnMainWindowClose; 
 Current.MainWindow = mainWindow; 
 mainWindow.Show（）; 
} 
 else 
 {
 MessageBox.Show（无法加载数据，错误，MessageBoxButton.OK）; 
 Current.Shutdown（-1）; 
} 
} 
} 
  

How one can show dialog window (e.g. login / options etc.) before the main window?

Here is what I tried (it apparently has once worked, but not anymore):

XAML:

<Application ...
    Startup="Application_Startup">

Application:

public partial class App : Application
{
    private void Application_Startup(object sender, StartupEventArgs e)
    {
        Window1 myMainWindow = new Window1();
        DialogWindow myDialogWindow = new DialogWindow();
        myDialogWindow.ShowDialog();
    }
}

Outcome: myDialogWindow is shown first. When it is closed, the Window1 is shown as expected. But as I close Window1 the application does not close at all.

解决方案

Here's the full solution that worked for me:

In App.xaml, I remove the StartupUri stuff, and add a Startup handler:

<Application x:Class="MyNamespace.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             Startup="ApplicationStart">
</Application>

In App.xaml.cs, I define the handler as follows:

public partial class App
{
    private void ApplicationStart(object sender, StartupEventArgs e)
    {
        //Disable shutdown when the dialog closes
        Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;

        var dialog = new DialogWindow();

        if (dialog.ShowDialog() == true)
        {
            var mainWindow = new MainWindow(dialog.Data);
            //Re-enable normal shutdown mode.
            Current.ShutdownMode = ShutdownMode.OnMainWindowClose;
            Current.MainWindow = mainWindow;
            mainWindow.Show();
        }
        else
        {
            MessageBox.Show("Unable to load data.", "Error", MessageBoxButton.OK);
            Current.Shutdown(-1);
        }
    }
}

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