python获取usb扫描枪数据

扫描枪数据"/>

python获取usb扫描枪数据

///

/// 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

///

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")]