c# - 在关闭时使WPF应用程序保持事件状态

Question

已经对此有疑问，但这有点不同，所以我要问。
这是我在Window内的xaml:

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Closing">
        <i:InvokeCommandAction Command="{Binding ClosingCommand}" />
    </i:EventTrigger>
</i:Interaction.Triggers>

这将关闭Command:

public virtual ICommand ClosingCommand
{
    get { return new RelayCommand(ClosingExecute); }
}

这是执行:

public virtual void ClosingExecute()
{
   MessageBoxResult result = MessageBox.Show("Close the application?", "Shut Down", MessageBoxButton.YesNo);

    if(result == MessageBoxResult.Yes)
    {
        Application.Current.Shutdown();
    }
    else
    {
       //I don't know what to write
    }

}

在这种情况下如何使我的应用程序保持 Activity 状态？谢谢。

Answer 1

来自Closing的documentation

Closing can be handled to detect when a window is being closed (for example, when Close is called). Furthermore, Closing can be used to prevent a window from closing. To prevent a window from closing, you can set the Cancel property of the CancelEventArgs argument to true.

您需要将事件处理程序连接到此事件，并将 Cancel设置为 true。

如果要以mvvmy的方式执行此操作， this answer可能会帮助您将eventargs连接到命令参数