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學(xué)習(xí)啦 > 學(xué)習(xí)電腦 > 電腦硬件知識 > 鍵盤鼠標(biāo) > js獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)

js獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)

時(shí)間: 沈迪豪908 分享

js獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)

  學(xué)習(xí)前端的同學(xué)你們知道怎么你們知道獲取桌面鼠標(biāo)鍵盤事件怎么實(shí)現(xiàn)嗎?不知道的話跟著學(xué)習(xí)啦小編一起來學(xué)習(xí)了解獲取桌面鼠標(biāo)鍵盤事件吧。

  獲取桌面鼠標(biāo)鍵盤事件的代碼

  using System;

  using System.Collections.Generic;

  using System.Linq;

  using System.Text;

  using System.Windows.Forms;

  using System.Runtime.InteropServices;

  using System.Reflection;

  namespace UDPService

  {

  /// <summary>

  ///

  /// </summary>

  [StructLayout(LayoutKind.Sequential)]

  public class POINT

  {

  public int x;

  public int y;

  }

  /// <summary>

  ///

  /// </summary>

  [StructLayout(LayoutKind.Sequential)]

  public class MouseHookStruct

  {

  public POINT pt;

  public int hwnd;

  public int wHitTestCode;

  public int dwExtraInfo;

  }

  /// <summary>

  ///

  /// </summary>

  [StructLayout(LayoutKind.Sequential)]

  public class KeyboardHookStruct

  {

  public int vkCode;

  public int scanCode;

  public int flags;

  public int time;

  public int dwExtraInfo;

  }

  /// <summary>

  ///

  /// </summary>

  public class GlobalHook

  {

  public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);

  public GlobalHook()

  {

  Start();

  }

  ~GlobalHook()

  {

  Stop();

  }

  public event MouseEventHandler OnMouseActivity;

  public event KeyEventHandler KeyDown;

  public event KeyPressEventHandler KeyPress;

  public event KeyEventHandler KeyUp;

  public delegate int GlobalHookProc(int nCode, Int32 wParam, IntPtr lParam);

  static int hMouseHook = 0;

  static int hKeyboardHook = 0;

  public const int WH_MOUSE_LL = 14;

  public const int WH_KEYBOARD_LL = 13;

  GlobalHookProc MouseHookProcedure;

  GlobalHookProc KeyboardHookProcedure;

  [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

  public static extern int SetWindowsHookEx(int idHook, GlobalHookProc lpfn,

  IntPtr hInstance, int threadId);

  [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

  public static extern bool UnhookWindowsHookEx(int idHook);

  [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

  public static extern int CallNextHookEx(int idHook, int nCode,

  Int32 wParam, IntPtr lParam);

  public void Start()

  {

  if (hMouseHook == 0)

  {

  MouseHookProcedure = new GlobalHookProc(MouseHookProc);

  try

  {

  hMouseHook = SetWindowsHookEx(WH_MOUSE_LL,

  MouseHookProcedure,

  Marshal.GetHINSTANCE(

  Assembly.GetExecutingAssembly().GetModules()[0]),

  0);

  }

  catch (Exception err)

  { }

  if (hMouseHook == 0)

  {

  Stop();

  throw new Exception("SetWindowsHookEx failed.");

  }

  }

  if (hKeyboardHook == 0)

  {

  KeyboardHookProcedure = new GlobalHookProc(KeyboardHookProc);

  try

  {

  hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL,

  KeyboardHookProcedure,

  Marshal.GetHINSTANCE(

  Assembly.GetExecutingAssembly().GetModules()[0]),

  0);

  }

  catch (Exception err2)

  { }

  if (hKeyboardHook == 0)

  {

  Stop();

  throw new Exception("SetWindowsHookEx ist failed.");

  }

  }

  }

  public void Stop()

  {

  bool retMouse = true;

  bool retKeyboard = true;

  if (hMouseHook != 0)

  {

  retMouse = UnhookWindowsHookEx(hMouseHook);

  hMouseHook = 0;

  }

  if (hKeyboardHook != 0)

  {

  retKeyboard = UnhookWindowsHookEx(hKeyboardHook);

  hKeyboardHook = 0;

  }

  if (!(retMouse && retKeyboard))

  throw new Exception("UnhookWindowsHookEx failed.");

  }

  private const int WM_MOUSEMOVE = 0x200;

  private const int WM_LBUTTONDOWN = 0x201;

  private const int WM_RBUTTONDOWN = 0x204;

  private const int WM_MBUTTONDOWN = 0x207;

  private const int WM_LBUTTONUP = 0x202;

  private const int WM_RBUTTONUP = 0x205;

  private const int WM_MBUTTONUP = 0x208;

  private const int WM_LBUTTONDBLCLK = 0x203;

  private const int WM_RBUTTONDBLCLK = 0x206;

  private const int WM_MBUTTONDBLCLK = 0x209;

  private int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam)

  {

  if ((nCode >= 0) && (OnMouseActivity != null))

  {

  MouseButtons button = MouseButtons.None;

  switch (wParam)

  {

  case WM_LBUTTONDOWN:

  //case WM_LBUTTONUP:

  //case WM_LBUTTONDBLCLK:

  button = MouseButtons.Left;

  break;

  case WM_RBUTTONDOWN:

  //case WM_RBUTTONUP:

  //case WM_RBUTTONDBLCLK:

  button = MouseButtons.Right;

  break;

  }

  int clickCount = 0;

  if (button != MouseButtons.None)

  if (wParam == WM_LBUTTONDBLCLK || wParam == WM_RBUTTONDBLCLK)

  clickCount = 2;

  else

  clickCount = 1;

  MouseHookStruct MyMouseHookStruct =

  (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));

  MouseEventArgs e = new MouseEventArgs(

  button,

  clickCount,

  MyMouseHookStruct.pt.x,

  MyMouseHookStruct.pt.y,

  0);

  OnMouseActivity(this, e);

  }

  return CallNextHookEx(hMouseHook, nCode, wParam, lParam);

  }

  [DllImport("user32")]

  public static extern int ToAscii(int uVirtKey,

  int uScanCode,

  byte[] lpbKeyState,

  byte[] lpwTransKey,

  int fuState);

  [DllImport("user32")]

  public static extern int GetKeyboardState(byte[] pbKeyState);

  private const int WM_KEYDOWN = 0x100;

  private const int WM_KEYUP = 0x101;

  private const int WM_SYSKEYDOWN = 0x104;

  private const int WM_SYSKEYUP = 0x105;

  private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)

  {

  if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null))

  {

  KeyboardHookStruct MyKeyboardHookStruct =

  (KeyboardHookStruct)Marshal.PtrToStructure(lParam,

  typeof(KeyboardHookStruct));

  if (KeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))

  {

  Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;

  KeyEventArgs e = new KeyEventArgs(keyData);

  KeyDown(this, e);

  }

  if (KeyPress != null && wParam == WM_KEYDOWN)

  {

  byte[] keyState = new byte[256];

  GetKeyboardState(keyState);

  byte[] inBuffer = new byte[2];

  if (ToAscii(MyKeyboardHookStruct.vkCode,

  MyKeyboardHookStruct.scanCode,

  keyState,

  inBuffer,

  MyKeyboardHookStruct.flags) == 1)

  {

  KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);

  KeyPress(this, e);

  }

  }

  if (KeyUp != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))

  {

  Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;

  KeyEventArgs e = new KeyEventArgs(keyData);

  KeyUp(this, e);

  }

  }

  return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);

  }

  }

  }

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