按键 - 事件生成 [英] Key pressed - event generated

问题描述

每当用户按下某个键时，如何生成一个事件（即使我当前的应用程序不在焦点上）？我实际上希望根据用户按下的键执行一些代码。我的应用程序将在后端运行。期待任何帮助。

How I can get an event to be generated whenever the user presses a key(even if my current application is not in focus)? I actually wish to execute some code according to the keys pressed by the user. My application will be running in back end. Looking forward to any help.

推荐答案

您好，



使用键盘挂钩：

简单的C＃全局低级键盘挂钩 [ ^ ]

使用C＃中的Hook [ ^ ]

Hi,

Use Keyboard Hooks:
A Simple C# Global Low Level Keyboard Hook[^]
Using Hooks from C#[^]

你应该明白焦点总是意味着键盘焦点，而不是别的。这意味着，当用户按下键盘上的键时，只有具有焦点的控件才会接收输入事件。



解决方案1解释了如何通过键盘触发某些事件Windows Hook，但这将是对正常UI开发的真正滥用。使用这种钩子只能用于某些特殊情况。例如，它可以是键盘宏，系统全局实用程序等的记录。如果这只是一个单独的UI应用程序，它没有干预其他进程的行为，你应该更好地检查你的UI设计。

-SA

You should understand that "focus" always means "keyboard focus" and nothing else. It means, only the control which has focus receives input events when the user presses key on a keyboard.

Solution 1 explains how you can trigger some events via a keyboard Windows Hook, but that would be a real abuse of normal UI development. Using such hooks can be justified only for some special cases. For example, it could be recording of keyboard macro, system-global utilities and the like. If this is just the separate UI application which does not have a task of intervention into the behavior of other processes, you should rather review your UI design.

—SA

请参阅 WinForms和WPF中的全局快捷方式 [ ^ ]

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