c# - 如何从用户控件 View 模型中关闭窗口？

Question

我有一个窗口，其中包含各种 UserControl 作为页面。是否可以从用户控件的数据上下文中关闭我没有引用的窗口？简化的细节:

设置窗口

    public SetupWindow()
    {
        InitializeComponent();
        Switcher.SetupWindow = this;
        Switcher.Switch(new SetupStart());  
    }

    public void Navigate(UserControl nextPage)
    {
        this.Content = nextPage;
    }

设置启动用户控件

<UserControl x:Class="...">
 <UserControl.DataContext>
    <local:SetupStartViewModel/>
 </UserControl.DataContext>
 <Grid>
    <Button Content="Continue" Command="{Binding ContinueCommand}"/>
 </Grid>
</UserControl>

设置启动 View 模型

    public SetupStartViewModel()
    {
    }

    private bool canContinueCommandExecute() { return true; }

    private void continueCommandExectue()
    {
        Switcher.Switch(new SetupFinish());
    }

    public ICommand ContinueCommand
    {
        get { return new RelayCommand(continueCommandExectue, canContinueCommandExecute); }
    }

Answer 1

我设法从这里的答案中找到解决方案:How to bind Close command to a button

View 模型:

public ICommand CloseCommand
{
    get { return new RelayCommand<object>((o) => ((Window)o).Close(), (o) => true); }
}

查看:

<Button Command="{Binding CloseCommand}" CommandParameter="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}" Content="Close"/>