You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
242 lines
6.7 KiB
242 lines
6.7 KiB
using System;
|
|
using System.Diagnostics;
|
|
using System.Reflection;
|
|
using System.Runtime.InteropServices;
|
|
using System.Text;
|
|
|
|
namespace BO
|
|
{
|
|
/// <summary>
|
|
/// 获取键盘输入或者USB扫描枪数据 可以是没有焦点 应为使用的是全局钩子
|
|
/// USB扫描枪 是模拟键盘按下
|
|
/// 这里主要处理扫描枪的值，手动输入的值不太好处理
|
|
/// </summary>
|
|
public class BardCodeHooK
|
|
{
|
|
public delegate void BardCodeDeletegate(BarCodes barCode);
|
|
public event BardCodeDeletegate BarCodeEvent;
|
|
|
|
//定义成静态，这样不会抛出回收异常
|
|
private static HookProc hookproc;
|
|
|
|
|
|
public struct BarCodes
|
|
{
|
|
public int VirtKey;//虚拟吗
|
|
public int ScanCode;//扫描码
|
|
public string KeyName;//键名
|
|
public uint Ascll;//Ascll
|
|
public char Chr;//字符
|
|
|
|
|
|
public string OriginalChrs; //原始 字符
|
|
public string OriginalAsciis;//原始 ASCII
|
|
|
|
|
|
public string OriginalBarCode; //原始数据条码
|
|
|
|
|
|
public bool IsValid;//条码是否有效
|
|
public DateTime Time;//扫描时间,
|
|
|
|
|
|
public string BarCode;//条码信息 保存最终的条码
|
|
}
|
|
|
|
|
|
private struct EventMsg
|
|
{
|
|
public int message;
|
|
public int paramL;
|
|
public int paramH;
|
|
public int Time;
|
|
public int hwnd;
|
|
}
|
|
|
|
|
|
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
|
|
private static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
|
|
|
|
|
|
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
|
|
private static extern bool UnhookWindowsHookEx(int idHook);
|
|
|
|
|
|
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
|
|
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")]
|
|
private static extern int GetKeyboardState(byte[] pbKeyState);
|
|
|
|
|
|
[DllImport("user32", EntryPoint = "ToAscii")]
|
|
private static extern bool ToAscii(int VirtualKey, int ScanCode, byte[] lpKeySate, ref uint lpChar, int uFlags);
|
|
|
|
|
|
[DllImport("kernel32.dll")]
|
|
public static extern IntPtr GetModuleHandle(string name);
|
|
|
|
|
|
|
|
|
|
delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
|
|
BarCodes barCode = new BarCodes();
|
|
int hKeyboardHook = 0;
|
|
// string strBarCode = "";
|
|
StringBuilder sbBarCode = new StringBuilder();
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
|
|
{
|
|
int i_calledNext = -10;
|
|
if (nCode == 0)
|
|
{
|
|
EventMsg msg = (EventMsg)Marshal.PtrToStructure(lParam, typeof(EventMsg));
|
|
if (wParam == 0x100)//WM_KEYDOWN=0x100
|
|
{
|
|
barCode.VirtKey = msg.message & 0xff;//虚拟吗
|
|
barCode.ScanCode = msg.paramL & 0xff;//扫描码
|
|
StringBuilder strKeyName = new StringBuilder(225);
|
|
if (GetKeyNameText(barCode.ScanCode * 65536, strKeyName, 255) > 0)
|
|
{
|
|
barCode.KeyName = strKeyName.ToString().Trim(new char[] { ' ', '\0' });
|
|
}
|
|
else
|
|
{
|
|
barCode.KeyName = "";
|
|
}
|
|
byte[] kbArray = new byte[256];
|
|
uint uKey = 0;
|
|
GetKeyboardState(kbArray);
|
|
|
|
|
|
// if (barCode.KeyName.Equals("A") || barCode.KeyName.Equals("a"))
|
|
// {
|
|
if (ToAscii(barCode.VirtKey, barCode.ScanCode, kbArray, ref uKey, 0))
|
|
{
|
|
barCode.Ascll = uKey;
|
|
barCode.Chr = Convert.ToChar(uKey);
|
|
barCode.OriginalChrs += " " + Convert.ToString(barCode.Chr);
|
|
barCode.OriginalAsciis += " " + Convert.ToString(barCode.Ascll);
|
|
barCode.OriginalBarCode += Convert.ToString(barCode.Chr);
|
|
}
|
|
// }
|
|
|
|
|
|
TimeSpan ts = DateTime.Now.Subtract(barCode.Time);
|
|
|
|
|
|
if (ts.TotalMilliseconds > 50)
|
|
{//时间戳，大于50 毫秒表示手动输入
|
|
|
|
sbBarCode.Remove(0, sbBarCode.Length);
|
|
sbBarCode.Append(barCode.Chr.ToString());
|
|
|
|
barCode.OriginalChrs = " " + Convert.ToString(barCode.Chr);
|
|
barCode.OriginalAsciis = " " + Convert.ToString(barCode.Ascll);
|
|
|
|
|
|
barCode.OriginalBarCode = Convert.ToString(barCode.Chr);
|
|
|
|
}
|
|
else
|
|
{
|
|
if ((msg.message & 0xff) == 13 && sbBarCode.Length > 3)
|
|
{
|
|
//回车
|
|
barCode.BarCode = barCode.OriginalBarCode.Replace("\r","").Replace("\t","");
|
|
barCode.IsValid = true;
|
|
sbBarCode.Remove(0, sbBarCode.Length);
|
|
}
|
|
sbBarCode.Append(barCode.Chr.ToString());
|
|
|
|
}
|
|
|
|
try
|
|
{
|
|
if (BarCodeEvent != null && barCode.IsValid)
|
|
{
|
|
|
|
//barCode.BarCode = barCode.BarCode.Replace("\b", "").Replace("\0",""); 可以不需要 因为大于50毫秒已经处理
|
|
//先进行 WINDOWS事件往下传
|
|
i_calledNext = CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
|
|
|
|
|
|
|
|
|
|
BarCodeEvent(barCode);//触发事件
|
|
|
|
barCode.BarCode = "";
|
|
|
|
|
|
barCode.OriginalChrs = "";
|
|
barCode.OriginalAsciis = "";
|
|
barCode.OriginalBarCode = "";
|
|
|
|
}
|
|
|
|
}
|
|
catch { }
|
|
finally
|
|
{
|
|
barCode.IsValid = false; //最后一定要 设置barCode无效
|
|
barCode.Time = DateTime.Now;
|
|
}
|
|
}
|
|
}
|
|
if (i_calledNext == -10)
|
|
{
|
|
i_calledNext = CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
|
|
}
|
|
return i_calledNext;
|
|
}
|
|
|
|
|
|
//安装钩子
|
|
public bool Start()
|
|
{
|
|
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
|
|
var moduleName1 = Process.GetCurrentProcess().MainModule.ModuleName;
|
|
var moduleName = Assembly.GetExecutingAssembly().ManifestModule.Name;
|
|
IntPtr modulePtr = GetModuleHandle(moduleName1);
|
|
|
|
|
|
//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);
|
|
}
|
|
|
|
|
|
//卸载钩子
|
|
public bool Stop()
|
|
{
|
|
if (hKeyboardHook != 0)
|
|
{
|
|
return UnhookWindowsHookEx(hKeyboardHook);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
}
|
|
}
|