C#实现扫描枪扫描二维码并打印(实例代码)

C#实现扫描枪扫描二维码并打印实现扫描枪扫描二维码并打印(实例代码实例代码)

主要介绍了C#实现扫描枪扫描二维码并打印，本文通过实例代码给大家介绍的非常详细，具有一定的参考借鉴价值,需要

的朋友可以参考下

1.使用usb口输入的扫描枪，这里实现使用了winform

首先创建一个CS文件

using System;

using System.Collections.Generic;

using System.Linq;

{

public delegate void BardCodeDeletegate(BarCodes barCode);

public event BardCodeDeletegate BarCodeEvent;

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 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", EntryPoint = "ToAscii")]

private static extern bool ToAscii(int VirtualKey, int ScanCode, byte[] lpKeySate, ref uint lpChar, int uFlags);

delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);

BarCodes barCode = new BarCodes();

int hKeyboardHook = 0;

string strBarCode = "";

private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)

{

if (nCode == 0)

{

if (GetKeyNameText(barCode.ScanCode * 65536, strKeyName, 255) > 0)

{

barCode.KeyName = strKeyName.ToString().Trim(new char[] { ' ', '' });

}

else

{

barCode.KeyName = "";

}

byte[] kbArray = new byte[256];

uint uKey = 0;

TimeSpan ts = DateTime.Now.Subtract(barCode.Time);

if (ts.TotalMilliseconds > 50)

{