WPF UI关闭时通知 [英] Notification when WPF UI closes

问题描述

我正在从托盘应用程序打开一个WPF窗口。我使用以下代码打开窗口：

  if（gui == null）
 {
 gui = new App（）; 
 gui.MainWindow = new mainWindow（）; 
 gui.InitializeComponent（）; 
 IsUIOpen = true; 
} 
 else if（！IsUIOpen）
 {
 gui.InitializeComponent（）; 
 gui.MainWindow.Show（）; 
 gui.MainWindow = new mainWindow（）; 
 IsUIOpen = true; 
} 
  

我需要从App级别运行UI，因为它使用资源字典。问题是，当窗口被用户关闭时，我需要运行代码，但没有一个事件处理程序似乎通知我。

我已经尝试过以下：

  gui.Exit + = new System.Windows.ExitEventHandler（settings_FormClosed）; 
 gui.MainWindow.Closed + = new EventHandler（settings_FormClosed）; 
  

我也尝试过 gui.Deactivated gui.SessionEnding ， gui.MainWindow.Closing ， gui.MainWindow.Deactivated ，可能还有一些。

当用户关闭窗口时，此代码将从Shell.xaml调用：

  private void Cancel_Click（object sender，RoutedEventArgs e）
 {
 presenter.Close（）; 
 this.Close（）; 
} 
  

我意识到App是静态的，所以它永远不会关闭，但其中之一事件处理程序应该挂起我关闭的事件。

如果它很有用，流程如下：TrayApp.cs - > App.xaml - > Shell.xaml

任何建议将不胜感激。感谢提前。

解决方案

Josh能够给出正确的解决方案。您可以看到他的答案此处。

基本上，我需要作为一个单独的进程启动WPF，然后使用MyProcess.WaitForEnd（）调用。我把它添加到一个线程，所以它不会阻止托盘。代码如下：

 处理myProcess = new Process（）; 
 myProcess.StartInfo.UseShellExecute = false; 
 myProcess.StartInfo.FileName =C：\\\mysettingsapp\\\mysettingsapp.exe; //替换为您的设置应用程序的路径
 myProcess.StartInfo.CreateNoWindow = false; 
 myProcess.Start（）; 
 //进程启动，现在等待它完成
 myProcess.WaitForExit（）; //使用WaitForExit（int）建立超时
  

I am opening a WPF window from a tray app. I use the following code to open the window:

        if (gui == null)
        {
            gui = new App();
            gui.MainWindow = new mainWindow();
            gui.InitializeComponent();
            IsUIOpen = true;
        }
        else if (!IsUIOpen)
        {
            gui.InitializeComponent();
            gui.MainWindow.Show();
            gui.MainWindow = new mainWindow();
            IsUIOpen = true;
        }

I need to run the UI from the App level because it uses a Resource Dictionary. The problem is, I need to run code when the window is closed by the user, but none of the event handlers seem to be notifying me.

I have tried the following:

gui.Exit += new System.Windows.ExitEventHandler(settings_FormClosed);
gui.MainWindow.Closed += new EventHandler(settings_FormClosed);

I have also tried gui.Deactivated, gui.SessionEnding, gui.MainWindow.Closing, gui.MainWindow.Deactivated, and probably some others.

When the user closes the window, this code is called from Shell.xaml:

    private void Cancel_Click(object sender, RoutedEventArgs e)
    {
        presenter.Close();
        this.Close();
    }

I realize App is static, so it will never close, but one of these event handlers should hook me up to a closing event.

In case it is useful, flow is as follows: TrayApp.cs -> App.xaml -> Shell.xaml

Any suggestions would be appreciated. Thanks in advance.

解决方案

Josh was able to give the correct solution. You can see his answer here.

Basically, I needed to start the WPF as a separate process, and then use the MyProcess.WaitForEnd() call. I added this to a thread so it wouldn't block the Tray. The code is as follows:

Process myProcess = new Process();
myProcess.StartInfo.UseShellExecute = false;
myProcess.StartInfo.FileName = "C:\\mysettingsapp\\mysettingsapp.exe"; // replace with path to your settings app
myProcess.StartInfo.CreateNoWindow = false;
myProcess.Start();
// the process is started, now wait for it to finish
myProcess.WaitForExit();  // use WaitForExit(int) to establish a timeout

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