基于C#实现热键注册工具类

目录

• 写在前面
• 代码实现
• 调用示例

写在前面

介绍一个验证过的热键注册工具类，使用系统类库user32.dll中的RegisterHotkey函数来实现全局热键的注册。

代码实现

    [Flags]
    public enum KeyModifiers
    {
        Alt = 1,
        Control = 2,
        Shift = 4,
        Windows = 8,
        NoRepeat = 0x4000
    }
 
    public static class HotKeyHelper
    {
        [DllImport("user32", SetLastError = true)]
        private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
 
        [DllImport("user32", SetLastError = true)]
        private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
 
        private static int _id = 0;
        private static volatile MessageWindow _wnd;
        private static volatile IntPtr _hwnd;
        private static ManualResetEvent _windowReadyEvent = new ManualResetEvent(false);
        static HotKeyHelper()
        {
            Thread messageLoop = new Thread(delegate ()
            {
                Application.Run(new MessageWindow());
            });
            messageLoop.Name = "MessageLoopThread";
            messageLoop.IsBackground = true;
            www.devze.commessageLoop.Start();
        }
 
        public static event EventHandler<HotKeyEventArgs> HotKeyPressed;
 
        public static int RegisterHotKey(Keys key, KeyModifiers modifiers)
        {
            _windowReadyEvent.WaitOne();
            int id = System.Threading.Interlocked.Increment(ref _id);
            _wnd.Invoke(new RegisterHotKeyDelegate(RegisterHotKeyInternal), _hwnd, id, (uint)modifiers, (uint)key);
            return id;
        }
 
        public static void UnregisterHotKey(int id)
        {
            _wnd.Invoke(new UnRegisterHotKeyDelegate(UnRegisterHotKeyInternal), _hwnd, id);
        }
 
        delegate void RegisterHotKeyDelegate(IntPtr hwnd, int id, uint modifiers, uint key);
        delegate void UnRegisterHotKeyDelegate(IntPtr hwnd, int id);
 
        private static void RegisterHotKeyInternal(IntPtr hwnd, int id, uint modifiers, uint key)
        {
            RegisterHotKey(hwnd, id, modifiers, key);
        }
 
        private static void UnRegisterHotKeyInternahpVGEfl(IntPtr hwnd, int id)
        {
            UnregisterHotKey(_hwnd, id);
        }
 
        private static void OnHotKeyPressed(HotKeyEventArgs e)
        {
            if (HotKeyHelper.HotKeyPressed != null)
            {
                HotKeyHelper.HotKeyPressed(null, e);
            }
        }
 
        private class MessageWindow : Form
        {
            public MessageWindow()
            {
                _wnd = this;
                _hwnd = this.Handle;
 http://www.devze.com               _windowReadyEvent.Set();
            python}
 
            protected override void WndProc(ref Message m)
            {
                if (m.Msg == WM_HOTKEY)
                {
                    HotKeyEventArgs e = new HotKeyEventArgs(m.LParam);
                    HotKeyHelper.OnHotKeyPressed(e);
                }
 
                base.WndProc(ref m);
            }
 
            protected override void SetVisibleCore(bool value)
            {
                // Ensure the window never becomes visible
                base.SetVisibleCore(false);
            }
 
            private const int WM_HOTKEY = 0x312;
        }
    }
 
    public class HotKeyEventArgs : EventArgs
    {
        public readonly Keys Key;
        public readonly KeyModifiers Modifiers;
 
        public HotKeyEventArgs(Keys key, KeyModifiers modifiers)
        {
            this.Key = key;
            this.Modifiers = mopythondifiers;
        }
 
        public HotKeyEventArgs(IntPtr hotKeyParam)
        {
            uint param = (uint)hotKeyParam.ToInt64();
            Key = (Keys)((param & 0xffff0000) >> 16);
            Modifiers = (KeyModifiers)(param & 0x0000ffff);
        }
    }

调用示例

        void RegisterHotKeyTest()
        {
            HotKeyHelper.RegisterHotKey(Keys.B, KeyModifiers.Alt);
            HotKeyHelper.HotKeyPressed += new EventHandler<HotKeyEventArgs>(OnHotKeyPressed);
        }
 
        void OnHotKeyPressed(object sender, HotKeyEventArgs e)
        {
            MessageBox.Show("Alt + B");
        }

执行结果

如果需要注册成Windows服务在后台运行，需要开启Service的允许与桌面交互选项。 

到此这篇关于基于C#实现热键注册工具类的文章就介绍到这了,更多相关C#热键注册内容请搜索编程客栈(www.devze.com)以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程客栈(www.devze.com)！