private int KeyboardHookProc(int nCode, int 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; //虚拟码
barCode.ScanCode = msg.paramL & 0xff; //扫描码
StringBuilder strKeyName = new StringBuilder(255);
if (GetKeyNameText(barCode.ScanCode * 65536, strKeyName, 255) > 0)
{
barCode.KeyName = strKeyName.ToString().Trim(new char[] { ' ', '0' });
}
else
{
barCode.KeyName = string.Empty;
}
byte[] kbArray = new byte[256];
uint uKey = 0;
GetKeyboardState(kbArray);
if (ToAscii(barCode.VirtKey, barCode.ScanCode, kbArray, ref uKey, 0))
{
barCode.AscII = uKey;
barCode.Chr = Convert.ToChar(uKey);
}
if (DateTime.Now.Subtract(barCode.Time).TotalMilliseconds > 50)
{
strBarCode = barCode.Chr.ToString();
}
else
{
if ((msg.message & 0xff) == 13 && strBarCode.Length > 3) //回车
{
barCode.BarCode = strBarCode;
barCode.IsValid = true;
}
strBarCode += barCode.Chr.ToString();
}
barCode.Time = DateTime.Now;
BarCodeEvent?.Invoke(barCode); //触发事件
barCode.IsValid = false;
}
}
return(CallNextHookEx(hKeyboardHook, nCode, wParam, lParam));
}
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)
{
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
_strBarCode = _barCode.Chr.ToString();
}
else
{
if ((msg.message & 0xff) == 13 && _strBarCode.Length > 3)
{//回车
_barCode.BarCode = _strBarCode;
_barCode.IsValid = true;
}
_strBarCode += _barCode.Chr.ToString();
}
_barCode.Time = DateTime.Now;
BarCodeEvent?.Invoke(_barCode);//触发事件
_barCode.IsValid = false;
return(CallNextHookEx(_hKeyboardHook, nCode, wParam, lParam));
}