319 lines
13 KiB
C#
319 lines
13 KiB
C#
using System;
|
||
using System.Collections.Generic;
|
||
using System.Diagnostics;
|
||
using System.Runtime.InteropServices;
|
||
using System.Text;
|
||
|
||
|
||
namespace LeatherApp.Device
|
||
{
|
||
public class ScannerCodeDev2 : IDisposable
|
||
{
|
||
#region WIN32API
|
||
//private const int WM_KEYDOWN = 0x100;//KEYDOWN
|
||
//private const int WM_KEYUP = 0x101;//KEYUP
|
||
//private const int WM_SYSKEYDOWN = 0x104;//SYSKEYDOWN
|
||
//private const int WM_SYSKEYUP = 0x105;//SYSKEYUP
|
||
//private static int HookProc(int nCode, Int32 wParam, IntPtr lParam);
|
||
private int hKeyboardHook = 0;//声明键盘钩子处理的初始值
|
||
private ScanerCodes codes = new ScanerCodes();//13为键盘钩子
|
||
//定义成静态，这样不会抛出回收异常
|
||
private static HookProc hookproc;
|
||
delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
|
||
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //设置钩子
|
||
private static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
|
||
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //卸载钩子
|
||
private static extern bool UnhookWindowsHookEx(int idHook);
|
||
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] //继续下个钩子
|
||
private static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
|
||
|
||
[DllImport("user32", EntryPoint = "GetKeyNameText")]
|
||
private static extern int GetKeyNameText(int IParam, StringBuilder lpBuffer, int nSize);
|
||
[DllImport("user32", EntryPoint = "GetKeyboardState")] //获取按键的状态
|
||
private static extern int GetKeyboardState(byte[] pbKeyState);
|
||
[DllImport("user32", EntryPoint = "ToAscii")] //ToAscii职能的转换指定的虚拟键码和键盘状态的相应字符或字符
|
||
private static extern bool ToAscii(int VirtualKey, int ScanCode, byte[] lpKeySate, ref uint lpChar, int uFlags);
|
||
//int VirtualKey //[in] 指定虚拟关键代码进行翻译。
|
||
//int uScanCode, // [in] 指定的硬件扫描码的关键须翻译成英文。高阶位的这个值设定的关键，如果是（不压）
|
||
//byte[] lpbKeyState, // [in] 指针，以256字节数组，包含当前键盘的状态。每个元素（字节）的数组包含状态的一个关键。如果高阶位的字节是一套，关键是下跌（按下）。在低比特，如/果设置表明，关键是对切换。在此功能，只有肘位的CAPS LOCK键是相关的。在切换状态的NUM个锁和滚动锁定键被忽略。 //byte[] lpwTransKey, // [out] 指针的缓冲区收到翻译字符或字符。 //uint fuState); // [in] Specifies whether a menu is active. This parameter must be 1 if a menu is active, or 0 otherwise.
|
||
|
||
[DllImport("kernel32.dll")] //使用WINDOWS API函数代替获取当前实例的函数,防止钩子失效
|
||
private static extern IntPtr GetModuleHandle(string name);
|
||
#endregion
|
||
|
||
public Action<DateTime,WarningEnum, string> WarningEvent;
|
||
//public Action<ScanerCodes> ScanerEvent;
|
||
public Action<string> ScanerEvent;
|
||
public ScannerCodeDev2()
|
||
{
|
||
}
|
||
public bool start()
|
||
{
|
||
try
|
||
{
|
||
if (hKeyboardHook == 0)
|
||
{
|
||
hookproc = new HookProc(KeyboardHookProc);
|
||
//GetModuleHandle 函数 替代 Marshal.GetHINSTANCE
|
||
//防止在 framework4.0中 注册钩子不成功
|
||
IntPtr modulePtr = GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName);
|
||
//WH_KEYBOARD_LL=13
|
||
//全局钩子 WH_KEYBOARD_LL
|
||
// hKeyboardHook = SetWindowsHookEx(13, hookproc, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
|
||
hKeyboardHook = SetWindowsHookEx(13, hookproc, modulePtr, 0);
|
||
}
|
||
return (hKeyboardHook != 0);
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
WarningEvent?.Invoke(DateTime.Now,WarningEnum.Normal, ex.Message);
|
||
return false;
|
||
}
|
||
}
|
||
public bool stop()
|
||
{
|
||
try
|
||
{
|
||
if (hKeyboardHook != 0)
|
||
{
|
||
bool retKeyboard = UnhookWindowsHookEx(hKeyboardHook);
|
||
hookproc = null;
|
||
hKeyboardHook = 0;
|
||
return retKeyboard;
|
||
}
|
||
return true;
|
||
}
|
||
catch
|
||
{
|
||
return false;
|
||
}
|
||
|
||
}
|
||
|
||
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
|
||
{
|
||
try
|
||
{
|
||
EventMsg msg = (EventMsg)Marshal.PtrToStructure(lParam, typeof(EventMsg));
|
||
codes.Add(msg);
|
||
if (msg.message == 13 && msg.paramH > 0 && !string.IsNullOrWhiteSpace(codes.Result))
|
||
{
|
||
ScanerEvent?.Invoke(codes.Result);
|
||
}
|
||
return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
public void Dispose()
|
||
{
|
||
stop();
|
||
}
|
||
|
||
public class ScanerCodes
|
||
{
|
||
private int ts = 100; // 指定输入间隔为300毫秒以内时为连续输入
|
||
private List<List<EventMsg>> _keys = new List<List<EventMsg>>();
|
||
private List<int> _keydown = new List<int>(); // 保存组合键状态
|
||
private List<string> _result = new List<string>(); // 返回结果集
|
||
private DateTime _last = DateTime.Now;
|
||
private byte[] _state = new byte[256];
|
||
private string _key = string.Empty;
|
||
private string _cur = string.Empty;
|
||
public EventMsg Event
|
||
{
|
||
get
|
||
{
|
||
if (_keys.Count == 0)
|
||
{
|
||
return new EventMsg();
|
||
}
|
||
else
|
||
{
|
||
return _keys[_keys.Count - 1][_keys[_keys.Count - 1].Count - 1];
|
||
}
|
||
}
|
||
}
|
||
public List<int> KeyDowns
|
||
{
|
||
get
|
||
{
|
||
return _keydown;
|
||
}
|
||
}
|
||
public DateTime LastInput
|
||
{
|
||
get
|
||
{
|
||
return _last;
|
||
}
|
||
}
|
||
public byte[] KeyboardState
|
||
{
|
||
get
|
||
{
|
||
return _state;
|
||
}
|
||
}
|
||
public int KeyDownCount
|
||
{
|
||
get
|
||
{
|
||
return _keydown.Count;
|
||
}
|
||
}
|
||
public string Result
|
||
{
|
||
get
|
||
{
|
||
if (_result.Count > 0)
|
||
{
|
||
return _result[_result.Count - 1].Trim();
|
||
}
|
||
else
|
||
{
|
||
return null;
|
||
}
|
||
}
|
||
}
|
||
public string CurrentKey
|
||
{
|
||
get
|
||
{
|
||
return _key;
|
||
}
|
||
}
|
||
public string CurrentChar
|
||
{
|
||
get
|
||
{
|
||
return _cur;
|
||
}
|
||
}
|
||
public bool isShift
|
||
{
|
||
get
|
||
{
|
||
return _keydown.Contains(160);
|
||
}
|
||
}
|
||
public void Add(EventMsg msg)
|
||
{
|
||
#region 记录按键信息
|
||
|
||
// 首次按下按键
|
||
if (_keys.Count == 0)
|
||
{
|
||
_keys.Add(new List<EventMsg>());
|
||
_keys[0].Add(msg);
|
||
_result.Add(string.Empty);
|
||
}
|
||
// 未释放其他按键时按下按键
|
||
else if (_keydown.Count > 0)
|
||
{
|
||
_keys[_keys.Count - 1].Add(msg);
|
||
}
|
||
// 单位时间内按下按键
|
||
else if (((TimeSpan)(DateTime.Now - _last)).TotalMilliseconds < ts)
|
||
{
|
||
_keys[_keys.Count - 1].Add(msg);
|
||
}
|
||
// 从新记录输入内容
|
||
else
|
||
{
|
||
_keys.Add(new List<EventMsg>());
|
||
_keys[_keys.Count - 1].Add(msg);
|
||
_result.Add(string.Empty);
|
||
}
|
||
#endregion
|
||
_last = DateTime.Now;
|
||
#region 获取键盘状态
|
||
// 记录正在按下的按键
|
||
if (msg.paramH == 0 && !_keydown.Contains(msg.message))
|
||
{
|
||
_keydown.Add(msg.message);
|
||
}
|
||
// 清除已松开的按键
|
||
if (msg.paramH > 0 && _keydown.Contains(msg.message))
|
||
{
|
||
_keydown.Remove(msg.message);
|
||
}
|
||
#endregion
|
||
#region 计算按键信息
|
||
|
||
int v = msg.message & 0xff;
|
||
int c = msg.paramL & 0xff;
|
||
StringBuilder strKeyName = new StringBuilder(500);
|
||
if (GetKeyNameText(c * 65536, strKeyName, 255) > 0)
|
||
{
|
||
_key = strKeyName.ToString().Trim(new char[] { ' ', '\0' });
|
||
GetKeyboardState(_state);
|
||
if (_key.Length == 1 && msg.paramH == 0)// && msg.paramH == 0
|
||
{
|
||
// 根据键盘状态和shift缓存判断输出字符
|
||
_cur = ShiftChar(_key, isShift, _state).ToString();
|
||
_result[_result.Count - 1] += _cur;
|
||
}
|
||
//判断是+ 强制添加+
|
||
else if (_key.Length == 5 && msg.paramH == 0 && msg.paramL == 78 && msg.message == 107)
|
||
{
|
||
// 根据键盘状态和shift缓存判断输出字符
|
||
_cur = Convert.ToChar('+').ToString();
|
||
_result[_result.Count - 1] += _cur;
|
||
}
|
||
// 备选
|
||
else
|
||
{
|
||
_cur = string.Empty;
|
||
}
|
||
}
|
||
#endregion
|
||
}
|
||
private char ShiftChar(string k, bool isShiftDown, byte[] state)
|
||
{
|
||
bool capslock = state[0x14] == 1;
|
||
bool numlock = state[0x90] == 1;
|
||
bool scrolllock = state[0x91] == 1;
|
||
bool shiftdown = state[0xa0] == 1;
|
||
char chr = (capslock ? k.ToUpper() : k.ToLower()).ToCharArray()[0];
|
||
if (isShiftDown)
|
||
{
|
||
if (chr >= 'a' && chr <= 'z')
|
||
{
|
||
chr = (char)((int)chr - 32);
|
||
}
|
||
else if (chr >= 'A' && chr <= 'Z')
|
||
{
|
||
if (chr == 'Z')
|
||
{
|
||
string s = "";
|
||
}
|
||
chr = (char)((int)chr + 32);
|
||
}
|
||
else
|
||
{
|
||
string s = "`1234567890-=[];',./";
|
||
string u = "~!@#$%^&*()_+{}:\"<>?";
|
||
if (s.IndexOf(chr) >= 0)
|
||
{
|
||
return (u.ToCharArray())[s.IndexOf(chr)];
|
||
}
|
||
}
|
||
}
|
||
return chr;
|
||
}
|
||
}
|
||
public struct EventMsg
|
||
{
|
||
public int message;
|
||
public int paramL;
|
||
public int paramH;
|
||
public int Time;
|
||
public int hwnd;
|
||
}
|
||
}
|
||
}
|