我怎么知道我的申请是否专注 [英] how can i know if my application is Focused or not

问题描述

我怎么知道我的应用程序是否聚焦

how can i know if my application is Focused or not

推荐答案

你可以检查 ContainsFocus [ ^ ]。 （假设WinForms，因为你没有指明。如果你指的是WPF或ASPX或其他什么，答案可能会有所不同。）

You can check ContainsFocus[^] on all of your forms. (Assuming WinForms, because you didn''t specify. If you''re referring to WPF or ASPX or something else the answer may be different.)

除了正确的解决方案2 ：



申请不能专注。



焦点总是意味着键盘焦点，当一个控件，每个交互式Windows会话一次只能一个，可以接受键盘的用户输入。您只能通过解决方案2告诉您确定当前关注的控件是应用程序窗口的所有者。作为窗口（窗体），它可以被激活或不被激活。当窗口被激活时，之前处于焦点的控件会自动获得焦点。

-SA

In addition to the correct Solution 2:

An application cannot be "focused" or not.

"Focus" always means keyboard focus, when a control, only one at a time per interactive Windows session, can accept user input from a keyboard. You can only determine is the control presently in focus is owner by on of the windows of your application, as Solution 2 tells you. As the the window (form), it can be activated or not. When a window is activated, the control which was previously in focus, automatically gains the focus.

—SA

使用主窗体的Activated和Deactivate事件...



这样的事情：

Use the Activated and Deactivate events of your main form...

Something like this:

Public Class MainForm

    Private hasFocus As Boolean = False

    Private Sub MainForm_Activated(sender As Object, e As EventArgs) Handles MyBase.Activated
        hasFocus = True
    End Sub

    Private Sub MainForm_Deactivate(sender As Object, e As EventArgs) Handles MyBase.Deactivate
        hasFocus = False
    End Sub

End Class

祝你好运！

Good luck!

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