注册系统热键类(原创)
C#注册系统热键类,参考多篇文章封装而成,只需一个构造函数即可完成,尤其适合于WPF
参考文章:http://www.cnblogs.com/dabaopku/archive/2010/02/21/1670793.html
系统热键类
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;
namespace
ThunderStarter
{
///
<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>
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
}
#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
*
10
;
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
==
0
){
//
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
}
}