/// <summary>
/// 热键
/// </summary>
public class HotKey
{
public const int WM_HOTKEY = 0x0312;
//如果函数执行成功，返回值不为0。
//如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
[DllImport("user32.dll", SetLastError = true)]
public static extern bool RegisterHotKey(
IntPtr hWnd, //要定义热键的窗口的句柄
int id, //定义热键ID（不能与其它ID重复）
KeyModifiers fsModifiers, //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
Keys vk //定义热键的内容
);
[DllImport("user32.dll", SetLastError = true)]
public static extern bool UnregisterHotKey(
IntPtr hWnd, //要取消热键的窗口的句柄
int id //要取消热键的ID
);
//定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值）
/// <summary>
/// 计算标识
/// </summary>
/// <param name="keyModifiers"></param>
/// <param name="key"></param>
/// <returns></returns>
internal static int CalculateID(KeyModifiers keyModifiers, Keys key)
{
return (int)keyModifiers + ((int)key << 4);
}
public readonly KeyModifiers ModifierKey;
public readonly Keys Key;
public readonly int id;
/// <summary>
///
/// </summary>
/// <param name="keyModifiers"></param>
/// <param name="key"></param>
internal HotKey(KeyModifiers keyModifiers, Keys key)
{
this.ModifierKey = keyModifiers;
this.Key = key;
this.id = HotKey.CalculateID(keyModifiers, key);
}
} /// <summary>
/// 热键事件参数
/// </summary>
public class HotKeyEventArgs : EventArgs
{
public readonly HotKey hotKey;
public readonly DateTime dateTime;
public HotKeyEventArgs(HotKey hotKey, DateTime time)
{
this.hotKey = hotKey;
this.dateTime = time;
}
}/// <summary> /// 热键委托 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> public delegate void HotKeyEventHandler(object sender, HotKeyEventArgs e);
[Flags]
public enum KeyModifiers
{
None = 0,
Alt = 1,
Ctrl = 2,
Shift = 4,
WindowsKey = 8
}窗体基类
public partial class UBaseForm : Form
{
public UBaseForm()
{
InitializeComponent();
}
protected Dictionary<int, HotKey> HotKeys;
public void RegisterHotKey(KeyModifiers keyModifiers, Keys keys)
{
if (HotKeys == null) HotKeys = new Dictionary<int, HotKey>();
int id = HotKey.CalculateID(keyModifiers, keys);
if (!HotKeys.ContainsKey(id))
{
HotKey newHotkey = new HotKey(keyModifiers, keys);
HotKeys.Add(id, newHotkey);
HotKey.RegisterHotKey(Handle, id, newHotkey.ModifierKey, newHotkey.Key);
}
}
public void UnRegisterHotKey(KeyModifiers keyModifiers, Keys keys)
{
if (HotKeys == null) return;
int id = HotKey.CalculateID(keyModifiers, keys);
if (HotKeys.ContainsKey(id))
{
HotKeys.Remove(id);
HotKey.UnregisterHotKey(Handle, id);
}
}
/// <summary>
/// 在热键按下时发生
/// </summary>
[Description("在热键按下时发生")]
public event HotKeyEventHandler HotKeyEventHandler;
///
/// 监视Windows消息
/// 重载WndProc方法，用于实现热键响应
///
///
protected override void WndProc(ref Message m)
{
if(m.Msg == HotKey.WM_HOTKEY)
{
int hotKeyId = (int)(m.WParam);
if (HotKeys != null && HotKeys.ContainsKey(hotKeyId))
{
HotKeyEventHandler?.Invoke(this, new HotKeyEventArgs(HotKeys[hotKeyId], DateTime.Now));
}
}
base.WndProc(ref m);
}
}使用方式
public partial class MainForm : UBaseForm
{
public MainForm()
{
InitializeComponent();
}
private void MainForm_Load(object sender, EventArgs e)
{
RegisterHotKey(KeyModifiers.Ctrl, Keys.T);
RegisterHotKey(KeyModifiers.Ctrl, Keys.W);
}
private void MainForm_HotKeyEventHandler(object sender, HotKeyEventArgs e)
{
if (e.hotKey.ModifierKey == KeyModifiers.Ctrl && e.hotKey.Key == Keys.T)
{
//执行方法
}
if (e.hotKey.ModifierKey == KeyModifiers.Ctrl && e.hotKey.Key == Keys.W)
{
//执行方法
}
}
}