在WPF中如何注册热键(转)
WPF注册热键大荟萃
源码下载:http://www.cnblogs.com/dabaopku/archive/2010/02/22/1671267.html
研究了一晚上,终于搞定了啦~~~~~
首先完整复制下面的第一篇文章中的代码
然后以下代码是
{
IntPtr handle=new WindowInteropHelper(this).Handle;
int id = 1000;
bool r=HotKey.RegisterHotKey(handle, id,(uint)HotKey.KeyFlags.MOD_CONTROL, (uint)System.Windows.Forms.Keys.F12);
MessageBox.Show(r.ToString()+" "+handle.ToString()+" ");
HotKey.InstallHotKeyHook(this);
}
其中Id随意取值,好像都没有问题
一直受第三篇文章干扰(说实在的,确实让人恼火,它的RegisterHotkey(Keys Key, KeyFlags keyflags)
明明是Key在前 keyflags在后,可是带入APi的
结底还是自己不够细心,足足浪费了半小时,郁闷!)
RegisterHotKey后却是反过来的,结果我也跟着他的弄反了control和F12,归根
然后反注册就很简单了,唉,累死了~~
在WPF中如何注册热键
来源:http://www.cnblogs.com/zengezenge/archive/2009/07/09/1519582.html
不说废话,直接看代码吧,其关键就是 System.Windows.Interop.HwndSource类。
第一步:注册热键,需要使用API函数,具体的参照网上的其它文章。唯一需要注意的是需要使用KeyInterop.VirtualKeyFromKey函数将
WPF的Key枚举转化为API函数可以使用的VirtualKeyCode :
/// <summary>
/// 注册热键处理函数
/// </summary>
/// <param name="hWnd">用于处理热键消息的窗体句柄</param>
/// <param name="id">热键的编号</param>
/// <param name="controlKey">控制键</param>
/// <param name="virtualKey">热键的虚键编码</param>
/// <returns>
/// <c>true</c>:注册成功<br/>
/// <c>false</c>:注册失败
/// </returns>
/// <remarks></remarks>
/// <history>
/// [ZengE] 2009-7-8 22:28 创建
/// </history>
[System.Runtime.InteropServices.DllImport("user32")]
public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint controlKey, uint virtualKey);
/// <summary>
/// 注销指定的热键
/// </summary>
/// <param name="hWnd">用于处理热键消息的窗体句柄</param>
/// <param name="id">要注销的热键编号</param>
/// <returns>
/// <c>true</c>:注销成功<br/>
/// <c>false</c>:注销失败
/// </returns>
/// <remarks></remarks>
/// <history>
/// [ZengE] 2009-7-8 22:30 创建
/// </history>
[System.Runtime.InteropServices.DllImport("user32")]
public static extern bool UnregisterHotKey(IntPtr hWnd, int id);
第二步:注册热键处理函数,主要的难点就在这里,在.NET的WinForm程序中一般使用重写Form的WinProc方法或者注册IMessageFilter来实现的,
但是在WPF中以上两种方式都无法获得热键消息的处理机会,除非是在WPF程序中隐藏一个常规的Form(最开始就是这么弄得,后来觉得实在是太丑陋了)
1 /// <summary>
2 /// 安装热键处理挂钩
3 /// </summary>
4 /// <param name="window">The window.</param>
5 /// <returns>
6 /// <c>true</c>:安装成功<br/>
7 /// <c>false</c>:安装失败
8 /// </returns>
9 /// <value>消息源</value>
10 /// <remarks></remarks>
11 /// <history>
12 /// [ZengE] 2009-7-8 23:57 创建
13 /// </history>
14 public static bool InstallHotKeyHook( Window window )
15 {
16 //判断组件是否有效
17 if ( null == window )
18 {
19 //如果无效,则直接返回
20 return false;
21 }
22
23 //获得窗体的句柄
24 System.Windows.Interop.WindowInteropHelper helper = new System.Windows.Interop.WindowInteropHelper( window );
25
26 //判断窗体句柄是否有效
27 if ( IntPtr.Zero == helper.Handle )
28 {
29 //如果句柄无效,则直接返回
30 return false;
31 }
32
33 //获得消息源
34 System.Windows.Interop.HwndSource source = System.Windows.Interop.HwndSource.FromHwnd( helper.Handle );
35
36 //判断消息源是否有效
37 if ( null == source )
38 {
39 //如果消息源无效,则直接返回
40 return false;
41 }
42
43 //挂接事件
44 source.AddHook( HotKeyHook );
45
46 //返回安装成功
47 return true;
48 }
49
50 /// <summary>
51 /// 热键处理过程
52 /// </summary>
53 /// <param name="hwnd">触发消息的窗口句柄</param>
54 /// <param name="msg">要被处理的消息编号</param>
55 /// <param name="wParam">消息参数</param>
56 /// <param name="lParam">消息参数</param>
57 /// <param name="handled">消息是否被处理</param>
58 /// <returns></returns>
59 /// <remarks></remarks>
60 /// <history>
61 /// [ZengE] 2009-7-8 23:54 创建
62 /// </history>
63 private static IntPtr HotKeyHook( IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled )
64 {
65 //判断是否为热键消息
66 if ( msg == WM_HOTKEY )
67 {
68
69 }
70
71 //返回
72 return IntPtr.Zero;
73 }
74
75 /// <summary>
76 /// 热键消息编号
77 /// </summary>
78 private const int WM_HOTKEY = 0x0312;
以上代码在Windows2008下测试通过。
在c#中使用全局快捷键
来源:http://hi.baidu.com/55csharp/blog/item/de6fef88efcebdbb0e24442f.html 由于.net并没有提供快捷键的库,所以要使用该功能得通过api实现。 在winapi中,注册和注销全局快捷键分别是通过RegisterHotKey和UnregisterHotKey函数实现。在c#中直接使用该api显得不够简洁,这里我提供了一个友好点的封装。 代码如下: static class Hotkey [DllImport("user32.dll")] /**//// <summary> /**//// <summary> /**//// <summary> const int WM_HOTKEY = 0x312; public delegate void HotKeyCallBackHanlder(); enum HotkeyModifiers
这里通过Hotkey类实现功能的封装,使用非常简单。下面为参考测试代码。
void Test() protected override void WndProc(ref Message m) private void button1_Click(object sender, EventArgs e) 当程序form1启动时,注册了两个快捷键Alt+T和Ctrl+Shift+K,单击button1的时候会注销快捷键Alt+T。代码比较简单,这里就不多介绍了。 注:快捷键是通过消息触发的,因此要重载WndProc函数,在里面添加对快捷键回调消息的处理方法Hotkey.ProcessHotKey(m)。
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C# 设置全局热键
来源:http://www.cnblogs.com/lhking/archive/2009/03/16/1413245.html
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections;
namespace HotKey1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public delegate void HotkeyEventHandler(int HotKeyID);
private int Hotkey1;
public class Hotkey : System.Windows.Forms.IMessageFilter
{
Hashtable keyIDs = new Hashtable();
IntPtr hWnd;
public event HotkeyEventHandler OnHotkey;
public enum KeyFlags
{
MOD_ALT = 0x1,
MOD_CONTROL = 0x2,
MOD_SHIFT = 0x4,
MOD_WIN = 0x8
}
[DllImport("user32.dll")]
public static extern UInt32 RegisterHotKey(IntPtr hWnd, UInt32 id, UInt32 fsModifiers, UInt32 vk);
[DllImport("user32.dll")]
public static extern UInt32 UnregisterHotKey(IntPtr hWnd, UInt32 id);
[DllImport("kernel32.dll")]
public static extern UInt32 GlobalAddAtom(String lpString);
[DllImport("kernel32.dll")]
public static extern UInt32 GlobalDeleteAtom(UInt32 nAtom);
public Hotkey(IntPtr hWnd)
{
this.hWnd = hWnd;
Application.AddMessageFilter(this);
}
public int RegisterHotkey(Keys Key, KeyFlags keyflags)
{
UInt32 hotkeyid = GlobalAddAtom(System.Guid.NewGuid().ToString());
RegisterHotKey((IntPtr)hWnd, hotkeyid, (UInt32)keyflags, (UInt32)Key);
keyIDs.Add(hotkeyid, hotkeyid);
return (int)hotkeyid;
}
public void UnregisterHotkeys()
{
Application.RemoveMessageFilter(this);
foreach (UInt32 key in keyIDs.Values)
{
UnregisterHotKey(hWnd, key);
GlobalDeleteAtom(key);
}
}
public bool PreFilterMessage(ref System.Windows.Forms.Message m)
{
if (m.Msg == 0x312)
{
if (OnHotkey != null)
{
foreach (UInt32 key in keyIDs.Values)
{
if ((UInt32)m.WParam == key)
{
OnHotkey((int)m.WParam);
return true;
}
}
}
}
return false;
}
}
public void OnHotkey(int HotkeyID) //Ctrl+F2隐藏窗体,再按显示窗体。
{
if (HotkeyID == Hotkey1)
{
if (this.Visible == true)
this.Visible = false;
else
this.Visible = true;
}
else
{
this.Visible = false;
}
}
private void Form1_Load(object sender, EventArgs e)
{
Hotkey hotkey;
hotkey = new Hotkey(this.Handle);
Hotkey1 = hotkey.RegisterHotkey(System.Windows.Forms.Keys.F2, Hotkey.KeyFlags.MOD_CONTROL); //定义快键(Ctrl + F2)
hotkey.OnHotkey += new HotkeyEventHandler(OnHotkey);
}
}
}