private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
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 (ToAscii(barCode.VirtKey, barCode.ScanCode, kbArray, ref uKey, 0))
{
barCode.Ascll = uKey;
barCode.Chr = Convert.ToChar(uKey);
}
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
//strBarCode = barCode.Chr.ToString();
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
{
sbBarCode.Append(barCode.Chr.ToString());
if ((msg.message & 0xff) == 13 && sbBarCode.Length > 1)
{ //回车
//barCode.BarCode = strBarCode;
barCode.BarCode = sbBarCode.ToString(); // barCode.OriginalBarCode;
barCode.IsValid = true;
sbBarCode.Remove(0, sbBarCode.Length);
}
//strBarCode += barCode.Chr.ToString();
}
barCode.Time = DateTime.Now;
try
{
if (BarCodeEvent != null && barCode.IsValid)
{
AsyncCallback callback = new AsyncCallback(AsyncBack);
//object obj;
Delegate[] delArray = BarCodeEvent.GetInvocationList();
//foreach (Delegate del in delArray)
foreach (BardCodeDeletegate del in delArray)
{
try
{
//方法1
//obj = del.DynamicInvoke(barCode);
//方法2
del.BeginInvoke(barCode, callback, del);//异步调用防止界面卡死
}
catch (Exception ex)
{
throw ex;
}
}
//BarCodeEvent(barCode);//触发事件
barCode.BarCode = "";
barCode.OriginalChrs = "";
barCode.OriginalAsciis = "";
barCode.OriginalBarCode = "";
}
}
catch (Exception)
{
throw;
}
finally
{
barCode.IsValid = false; //最后一定要 设置barCode无效
barCode.Time = DateTime.Now;
}
}
}
return(CallNextHookEx(hKeyboardHook, nCode, wParam, lParam));
}
/// <summary>
/// 键盘钩子处理函数
/// </summary>
private int KeyboardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode != 0)
{
return(CallNextHookEx(_hKeyboardHook, nCode, wParam, lParam));
}
var msg = (EventMsg)Marshal.PtrToStructure(lParam, typeof(EventMsg));
if (wParam != 0x100)
{
//0x100标识键盘按下
return(CallNextHookEx(_hKeyboardHook, nCode, wParam, lParam));
}
_barCode.VirtKey = msg.message & 0xff; //虚拟吗
_barCode.ScanCode = msg.paramL & 0xff; //扫描码
var strKeyName = new StringBuilder(225);
_barCode.KeyName = GetKeyNameText(_barCode.ScanCode * 65536, strKeyName, 255) > 0 ? strKeyName.ToString().Trim(' ', '\0') : "";
var kbArray = new byte[256];
uint uKey = 0;
GetKeyboardState(kbArray);
if (ToAscii(_barCode.VirtKey, _barCode.ScanCode, kbArray, ref uKey, 0))
{
_barCode.Ascll = uKey;
_barCode.Chr = Convert.ToChar(uKey);
}
var 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
{
SbBarCode.Append(_barCode.Chr.ToString());
if ((msg.message & 0xff) == 13 && SbBarCode.Length > 3)
{
//回车
_barCode.BarCode = SbBarCode.Replace("\r", "").ToString();
_barCode.IsValid = true;
SbBarCode.Remove(0, SbBarCode.Length);
}
}
_barCode.Time = DateTime.Now;
try
{
if (BarCodeEvent != null && _barCode.IsValid)
{
var callback = new AsyncCallback(AsyncBack);
var delArray = BarCodeEvent.GetInvocationList();
foreach (var del in delArray)
{
var barcodeDelegate = del as BardCodeDeletegate;
//异步调用防止界面卡死
barcodeDelegate?.BeginInvoke(_barCode, callback, del);
}
_barCode.BarCode = "";
_barCode.OriginalChrs = "";
_barCode.OriginalAsciis = "";
_barCode.OriginalBarCode = "";
}
}
finally
{
//最后一定要 设置barCode无效
_barCode.IsValid = false;
_barCode.Time = DateTime.Now;
}
return(CallNextHookEx(_hKeyboardHook, nCode, wParam, lParam));
}