如果加载了另一个窗口，则按钮将可见

本文关键字：按钮 加载 另一个 窗口 如果 | 更新日期: 2023-09-27 18:21:16

我有一个项目，如果加载了另一个窗口，我希望主窗口中的按钮可见，如果该窗口关闭，则折叠

我试过这种方式

主窗口的Xaml

<Grid  >
    <Button x:Name="button" Content="Opne Window1" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75"  Click="button_Click" Margin="220,110,0,0"/>
    <Button x:Name="WinBut1" Content="Check order" HorizontalAlignment="Left" VerticalAlignment="Top"  Visibility="Hidden" Width="75" Click="button9_Click" Margin="10,1,0,0"/>
</Grid>

在主窗口控件的代码后面：

public partial class MainWindow : Window
{
    Window1 Window1 = new Window1();
    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;
        //this.Window1.Loaded += new RoutedEventHandler (CheckWindow);
        this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
    }
    void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        Window1 childWindow = new Window1();
        childWindow.MyEvent += new EventHandler(childWindow_MyEvent);
        childWindow.ShowDialog();
    }
    void childWindow_MyEvent(object sender, EventArgs e)
    {
        if (Window1 != null)
        {
            Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(
           delegate ()
           {
               WinBut1.Visibility = Visibility.Visible;
           }
            ));
        }
    }
    //void CheckWindow(object sender, RoutedEventArgs e)
    //{
    //    if (Window1 != null  && Window1.Visibility == Visibility.Visible)
    //    {
    //        Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(
    //       delegate ()
    //       {
    //           WinBut1.Visibility = Visibility.Visible;
    //       }
    //        ));
    //    }
    //}
    private void button_Click(object sender, RoutedEventArgs e)
    {
        new Window1().Show();
    }
}

在Window1控件的代码后面：

    public Window1()
    {
        InitializeComponent();
        this.Loaded += new RoutedEventHandler(win1_Loaded);
    }
    public event EventHandler MyEvent;
    protected void OnMyEvent()
    {
        if (this.MyEvent != null)
            this.MyEvent(this, EventArgs.Empty);
    }

    void win1_Loaded(object sender, RoutedEventArgs e)
    {
        this.OnMyEvent();
    }
}

如果加载了另一个窗口，则按钮将可见

在Window类对象中有两个事件Loaded和Closed。

您需要为它们订阅两个事件处理程序。所有这些都在你的Window课堂上完成。

根据你的要求，你可以做以下事情：

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Window1 win = new Window1();
            win.Loaded += win_Loaded;
            win.Closed += win_Closed;
            win.ShowDialog();
        }
        void win_Closed(object sender, EventArgs e)
        {
            this.but.Visibility = Visibility.Visible;
        }
        void win_Loaded(object sender, RoutedEventArgs e)
        {
            this.but.Visibility = Visibility.Hidden;
        }

这个代码用在你的窗口代码后面。

很简单，您只需要在MainWindow中设置Window1的IsVisibleChanged，并将按钮的可见性设置为窗口的可见性1。

您的主窗口.cs:

public partial class MainWindow : Window
{
    Window1 window1;
    public MainWindow()
    {
        InitializeComponent();
        window1 = new Window1();
        window1.IsVisibleChanged += Window1_IsVisibleChanged;
        this.Closing += MainWindow_Closing;
    }
    private void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
    {
        Application.Current.Shutdown();//will close all windows
    }
    private void Window1_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e)
    {
        buttonCollapsed.Visibility = window1.Visibility;
    }
    private void buttonShow_Click(object sender, RoutedEventArgs e)
    {
        window1.Show();
    }

和Window1.cs:

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
        this.Closing += Window1_Closing;
    }
    private void Window1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
    {
        if(sender is Window1)
        {
            e.Cancel = true;//Cancel the closing
            this.Hide();
        }
    }
    private void buttonHide_Click(object sender, RoutedEventArgs e)
    {
        this.Hide();//hide your window --> IsVisibilityChanged-Event will be raised
    }
}
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