任务栏上的 C# wpf 多个 windows

Question

我创建了一个包含多个 windows 的 C# 项目。当我做一些其他事情时，一些 windows 失去了焦点。然后我必须通过单击任务栏将它们一个一个地放在前面。

我想知道 C# wpf 上是否有 OnTaskBarClick 事件 window？

然后我需要做的是将所有子 windows 设置为 "ShowInTaskbar="False""。然后，当我在任务栏上单击 mainwindow 时，我会将所有 windows 置于最前面。

Answer 1

您需要使用 Window.Activated 事件来检测应用程序的 window 何时进入焦点：

来自文档：

A window is activated (becomes the foreground window) when:

The window is first opened.

A user switches to a window by selecting it with the mouse, pressing ALT+TAB, or from Task Manager.

A user clicks the window's taskbar button.

或者你可以使用Application.Activated事件。

点击已经激活的 window 的控件也可能导致 Window.Activated 事件触发，所以如果问题是它触发得太频繁，您可能需要观察当 应用程序 在活动和停用之间切换时。

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        Application.Current.Activated += CurrentOnActivated;
        Application.Current.Deactivated += CurrentOnDeactivated;

    }

    private bool isDeactivated = true;

    private void CurrentOnDeactivated(object sender, EventArgs eventArgs)
    {
        isDeactivated = true;
        //handle case where another app gets focus
    }

    private void CurrentOnActivated(object sender, EventArgs eventArgs)
    {
        if (isDeactivated)
        {
            //Ok, this app was in the background but now is in the foreground,
            isDeactivated = false;

            //TODO: bring windows to forefont                
            MessageBox.Show("activated");

        }
    }
}

Answer 2

我认为您遇到的是 window Owner 未在 child window 上设置。

请参考Window.Owner Property

When a child window is opened by a parent window by calling ShowDialog, an implicit relationship is established between both parent and child window. This relationship enforces certain behaviors, including with respect to minimizing, maximizing, and restoring.

-

When a child window is created by a parent window by calling Show, however, the child window does not have a relationship with the parent window. This means that:

The child window does not have a reference to the parent window.

The behavior of the child window is not dependent on the behavior of the parent window; either window can cover the other, or be minimized, maximized, and restored independently of the other.

您可以通过在调用 Show() 或 ShowDialog()child window 中设置 Owner 属性轻松解决此问题

Window ownedWindow = new Window();
ownedWindow.Owner = this; // this being the main or parent window
ownedWindow.Show();

Note : if conforming to an MVVM pattern, this can become a little more cumbersome, however there is plenty of resources on how to link owner and parent windows.

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