c# - 拦截 CTRL + 字母 + 字母
问题描述
我想在推的时候拦截CTRL + A + A
我阅读了文章 如何使用 WPF 和 .NET 3.5 注册全局热键来说 CTRL+SHIFT+(LETTER)?
无论如何,我尝试更改代码添加和“&”但是这个和其他一些尝试是错误的。
如果我按 怎么得到CTRL + A + A?
谢谢您的帮助!
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace GlobalHotkeyExampleForm
{
public partial class Form1 : Form
{
private void Form1_Load(object sender, EventArgs e)
{
}
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
enum KeyModifier
{
None = 0,
Alt = 1,
Control = 2,
Shift = 4,
WinKey = 8
}
public Form1()
{
InitializeComponent();
int id = 0; // The id of the hotkey.
RegisterHotKey(this.Handle, id, (int)KeyModifier.Control, Keys.A.GetHashCode()); // Register ctrl + a as global hotkey.
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == 0x0312)
{
/* Note that the three lines below are not needed if you only want to register one hotkey.
* The below lines are useful in case you want to register multiple keys, which you can use a switch with the id as argument, or if you want to know which key/modifier was pressed for some particular reason. */
Keys key = (Keys)(((int)m.LParam >> 16) & 0xFFFF); // The key of the hotkey that was pressed.
KeyModifier modifier = (KeyModifier)((int)m.LParam & 0xFFFF); // The modifier of the hotkey that was pressed.
int id = m.WParam.ToInt32(); // The id of the hotkey that was pressed.
MessageBox.Show("Hotkey has been pressed!");
// do something
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
UnregisterHotKey(this.Handle, 0); // Unregister hotkey with id 0 before closing the form. You might want to call this more than once with different id values if you are planning to register more than one hotkey.
}
private void button1_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
解决方案
这是我发现聆听 Key Pressure 的解决方案。我从“Dylan's Web”中获取了代码并更改了一些内容: https ://www.dylansweb.com/2014/10/low-level-global-keyboard-hook-sink-in-c-net/
这是一个多行的类:
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Input;
namespace DesktopWPFAppLowLevelKeyboardHook
{
public class LowLevelKeyboardListener
{
private const int WH_KEYBOARD_LL = 13;
private const int WM_KEYDOWN = 0x0100;
private const int WM_KEYUP = 0x101;
private const int WM_SYSKEYDOWN = 0x104;
private const int WM_SYSKEYUP = 0x105;
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr GetModuleHandle(string lpModuleName);
public delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
public event EventHandler<KeyPressedArgs> OnKeyPressed;
private LowLevelKeyboardProc _proc;
private IntPtr _hookID = IntPtr.Zero;
public LowLevelKeyboardListener()
{
_proc = HookCallback;
}
public void HookKeyboard()
{
_hookID = SetHook(_proc);
}
public void UnHookKeyboard()
{
UnhookWindowsHookEx(_hookID);
}
private IntPtr SetHook(LowLevelKeyboardProc proc)
{
using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
{
return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0);
}
}
private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN || wParam == (IntPtr)WM_SYSKEYDOWN)
{
int vkCode = Marshal.ReadInt32(lParam);
int status = 1;
if (OnKeyPressed != null) { OnKeyPressed(this, new KeyPressedArgs(KeyInterop.KeyFromVirtualKey(vkCode), status)); }
}
else if (nCode >= 0 && wParam == (IntPtr)WM_KEYUP || wParam == (IntPtr)WM_SYSKEYUP)
{
int vkCode = Marshal.ReadInt32(lParam);
int status = 0;
if (OnKeyPressed != null) { OnKeyPressed(this, new KeyPressedArgs(KeyInterop.KeyFromVirtualKey(vkCode), status)); }
}
return CallNextHookEx(_hookID, nCode, wParam, lParam);
}
}
public class KeyPressedArgs : EventArgs
{
public Key KeyPressed { get; private set; }
public int KeyStatus { get; private set; }
public KeyPressedArgs(Key key, int status)
{
KeyPressed = key;
KeyStatus = status;
}
}
}
这是表格:
using DesktopWPFAppLowLevelKeyboardHook;
using System;
using System.Windows.Forms;
namespace AppLowLevelKeyboardHook
{
public partial class Form1 : Form
{
private LowLevelKeyboardListener _listener;
public int ctrlStatus;
public int cStatus;
public Form1()
{
InitializeComponent();
}
private void Window_Loaded(object sender, EventArgs e)
{
_listener = new LowLevelKeyboardListener();
_listener.OnKeyPressed += _listener_OnKeyPressed;
_listener.HookKeyboard();
}
private void _listener_OnKeyPressed(object sender, KeyPressedArgs e)
{
this.textBox_DisplayKeyboardInput.Text += e.KeyPressed.ToString() + e.KeyStatus.ToString();
if (e.KeyStatus == 1 && (e.KeyPressed.ToString() == "LeftCtrl" || e.KeyStatus.ToString() == "RightCtrl"))
{
if (ctrlStatus == 0)
{
ctrlStatus = ctrlStatus + 1;
timer1.Start();
}
}
else if (e.KeyStatus == 1 && e.KeyPressed.ToString() == "C")
{
if (ctrlStatus == 1 && (cStatus == 0 || cStatus == 2))
{
cStatus = cStatus + 1;
}
}
//no need to wait that CTRL will be released
//else if (e.KeyStatus == 0 && (e.KeyPressed.ToString() == "LeftCtrl" || e.KeyStatus.ToString() == "RightCtrl"))
//{
// if (ctrlStatus == 1)
// {
// ctrlStatus = ctrlStatus + 1;
// }
//}
else if (e.KeyStatus == 0 && e.KeyPressed.ToString() == "C")
{
if (ctrlStatus == 1)
{
if (cStatus == 1 || cStatus == 3)
{
cStatus = cStatus + 1;
}
}
}
}
private void timer1_Tick(object sender, EventArgs e)
{
if ((ctrlStatus == 1) && cStatus == 3 || cStatus == 4) //no need to wait that CTRL will be released (ctrlStatus == 2)
{
//do something
label1.Text = "";
label1.Refresh();
label1.Text = Clipboard.GetText(TextDataFormat.UnicodeText);
//\do something
}
ctrlStatus = 0;
cStatus = 0;
timer1.Stop();
}
private void Window_Closing(object sender, FormClosingEventArgs e)
{
_listener.UnHookKeyboard();
}
}
}
PS:最初它是WPF
应用程序,但我的它是一个WFA
并且KeyInterop
不包括在内。所以我只是添加了一个参考程序集WindowsBase.dll
推荐阅读
- sql - 当我尝试在 PostgreSQL 中创建函数时,我得到 ERROR: syntax error at or near "BEGIN"
- python - 结合字典和列表
- javascript - 是否有 Eslint 规则不让条件和条件主体具有相同的缩进?
- node.js - Node.js 请求模块获取间歇性 401 响应
- javascript - 如何返回 Promise.all 获取 api json 数据?
- javascript - 在 php 中获取 POSTed JSON 数组
- google-api - 如何在 google-auth-library-nodejs 中使用 Oauth2Client 在 Gaxios 请求对象中发送二进制数据
- ssis - 如何通过 SSIS 刷新 tableau 报表
- jenkins - Jenkins 声明性管道从前一阶段的输出设置全局环境变量
- java - 网格袋布局困难重重