WPF 注册全局快捷键

.NET技术交流群 199281001 .欢迎加入。

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Windows;
 using System.Windows.Forms;
 using System.Windows.Interop;
 using System.Collections;

 /// <summary>
 /// 直接构造类实例即可注册
 /// 自动完成注销
 /// 注意注册时会抛出异常
 /// </summary>
 public class HotKey
 //注册系统热键类
 //热键会随着程序结束自动解除,不会写入注册表
 {
     #region Member

     int KeyId;         //热键编号
     IntPtr Handle;     //窗体句柄
     Window window;     //热键所在窗体
     uint Controlkey;   //热键控制键
     uint Key;          //热键主键

     public delegate void OnHotkeyEventHandeler();     //热键事件委托
     public event OnHotkeyEventHandeler OnHotKey = null;   //热键事件    

     static Hashtable KeyPair = new Hashtable();         //热键哈希表

     private const int WM_HOTKEY = 0x0312;       // 热键消息编号

     public enum KeyFlags    //控制键编码
     {
         MOD_ALT = 0x1,
         MOD_CONTROL = 0x2,
         MOD_SHIFT = 0x4,
         MOD_WIN = 0x8,
         MOD_CONTROLALT = 0x2 + 0x1
     }

     #endregion

     /// <summary>
     /// 构造函数
     /// </summary>
     /// <param name="win">注册窗体</param>
     /// <param name="control">控制键</param>
     /// <param name="key">主键</param>
     public HotKey(Window win, HotKey.KeyFlags control, Keys key)
     //构造函数,注册热键
     {

         Handle = new WindowInteropHelper(win).Handle;
         window = win;
         Controlkey = (uint)control;
         Key = (uint)key;
         KeyId = (int)Controlkey + (int)Key * ;
         if (HotKey.KeyPair.ContainsKey(KeyId))
         {
             throw new Exception("热键已经被注册!");
         }

         //注册热键
         if (false == HotKey.RegisterHotKey(Handle, KeyId, Controlkey, Key))
         {
             throw new Exception("热键注册失败!");
         }
         if (HotKey.KeyPair.Count == )
         {
             //消息挂钩只能连接一次!!
             if (false == InstallHotKeyHook(this))
             {
                 throw new Exception("消息挂钩连接失败!");
             }
         }

         //添加这个热键索引
         HotKey.KeyPair.Add(KeyId, this);

     }

     #region core

     [System.Runtime.InteropServices.DllImport("user32")]
     private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint controlKey, uint virtualKey);

     [System.Runtime.InteropServices.DllImport("user32")]
     private static extern bool UnregisterHotKey(IntPtr hWnd, int id);

     static private bool InstallHotKeyHook(HotKey hk)
     //安装热键处理挂钩
     {
         if (hk.window == null || hk.Handle == IntPtr.Zero)
             return false;

         //获得消息源
         System.Windows.Interop.HwndSource source = System.Windows.Interop.HwndSource.FromHwnd(hk.Handle);
         if (source == null) return false;

         //挂接事件
         source.AddHook(HotKey.HotKeyHook);
         return true;
     }

     static private IntPtr HotKeyHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
     //热键处理过程
     {
         if (msg == WM_HOTKEY)
         {
             HotKey hk = (HotKey)HotKey.KeyPair[(int)wParam];
             if (hk.OnHotKey != null) hk.OnHotKey();
         }
         return IntPtr.Zero;
     }

     ~HotKey()
     //析构函数,解除热键
     {
         HotKey.UnregisterHotKey(Handle, KeyId);
     }

     #endregion
 }

注册和卸载钩子

调用：

 1     private void MainWindow_OnLoaded(object sender, RoutedEventArgs e)
 2         {
 3            HotKey hot = new HotKey(this,HotKey.KeyFlags.MOD_CONTROLALT,Keys.M);
 4            hot.OnHotKey += hot_OnHotKey;
 5         }
 6
 7         void hot_OnHotKey()
 8         {
 9             MessageBox.Show("我是按ctrl+alt+m 进来的!");
10         }