C#實現掃描槍掃描二維碼並列印(例項程式碼)
阿新 • • 發佈：2020-01-07
1.使用usb口輸入的掃描槍，這裡實現使用了winform
首先建立一個CS檔案
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
namespace am_sign
{
class BardCodeHooK
{
public delegate void BardCodeDeletegate(BarCodes barCode);
public event BardCodeDeletegate BarCodeEvent;
public struct BarCodes
{
public int VirtKey;//虛擬嗎
public int ScanCode;//掃描碼
public string KeyName;//鍵名
public uint Ascll;//Ascll
public char Chr;//字元
public string BarCode;//條碼資訊
public bool IsValid;//條碼是否有效
public DateTime Time;//掃描時間
}
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",CallingConvention = CallingConvention.StdCall)]
private static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll",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);
delegate int HookProc(int nCode,IntPtr lParam);
BarCodes barCode = new BarCodes();
int hKeyboardHook = 0;
string strBarCode = "";
private int KeyboardHookProc(int nCode,IntPtr lParam)
{
if (nCode == 0)
{
EventMsg msg = (EventMsg)Marshal.PtrToStructure(lParam,typeof(EventMsg));
if (wParam == 0x100)//WM_KEYDOWN=0x100
{
barCode.VirtKey = msg.message & 0xff;//虛擬嗎
barCode.ScanCode = msg.paramL & 0xff;//掃描碼
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)
{
strBarCode = barCode.Chr.ToString();
}
else
{
if ((msg.message & 0xff) == 13 && strBarCode.Length > 3)
{
barCode.BarCode = strBarCode;
barCode.IsValid = true;
}
strBarCode += barCode.Chr.ToString();
}
barCode.Time = DateTime.Now;
if (BarCodeEvent != null) BarCodeEvent(barCode);//觸發事件
barCode.IsValid = false;
}
}
return CallNextHookEx(hKeyboardHook,nCode,wParam,lParam);
}
//安裝鉤子
public bool Start()
{
if (hKeyboardHook == 0)
{
//WH_KEYBOARD_LL=13
hKeyboardHook = SetWindowsHookEx(13,new HookProc(KeyboardHookProc),Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);
}
return (hKeyboardHook != 0);
}
//解除安裝鉤子
public bool Stop()
{
if (hKeyboardHook != 0)
{
return UnhookWindowsHookEx(hKeyboardHook);
}
return true;
}
}
}2.在winform中呼叫
BardCodeHooK BarCode = new BardCodeHooK();
public Form1()
{
InitializeComponent();
BarCode.BarCodeEvent += new BardCodeHooK.BardCodeDeletegate(BarCode_BarCodeEvent);
}
string value = ""; //value為掃碼槍獲取的內容，以Enter結尾
private delegate void ShowInfoDelegate(BardCodeHooK.BarCodes barCode);
private void ShowInfo(BardCodeHooK.BarCodes barCode)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new ShowInfoDelegate(ShowInfo),new object[] { barCode });
}
else
{
if (barCode.KeyName.Equals("Enter"))
{
hook_KeyDown(value);
value = "";
}
else
{
value += barCode.Chr.ToString();
}
}
}
void BarCode_BarCodeEvent(BardCodeHooK.BarCodes barCode)
{
ShowInfo(barCode);
}3.列印前，需要將TSLIB.dll檔案放入c:\\windows\system下
using System.Runtime.InteropServices;
namespace am_sign
{
class TSCLIB_DLL
{
[DllImport("TSCLIB.dll",EntryPoint = "about")]
public static extern int about();
[DllImport("TSCLIB.dll",EntryPoint = "openport")]
public static extern int openport(string printername);
[DllImport("TSCLIB.dll",EntryPoint = "barcode")]
public static extern int barcode(string x,string y,string type,string height,string readable,string rotation,string narrow,string wide,string code);
[DllImport("TSCLIB.dll",EntryPoint = "clearbuffer")]
public static extern int clearbuffer();
[DllImport("TSCLIB.dll",EntryPoint = "closeport")]
public static extern int closeport();
[DllImport("TSCLIB.dll",EntryPoint = "downloadpcx")]
public static extern int downloadpcx(string filename,string image_name);
[DllImport("TSCLIB.dll",EntryPoint = "formfeed")]
public static extern int formfeed();
[DllImport("TSCLIB.dll",EntryPoint = "nobackfeed")]
public static extern int nobackfeed();
[DllImport("TSCLIB.dll",EntryPoint = "printerfont")]
public static extern int printerfont(string x,string fonttype,string xmul,string ymul,string text);
[DllImport("TSCLIB.dll",EntryPoint = "printlabel")]
public static extern int printlabel(string set,string copy);
[DllImport("TSCLIB.dll",EntryPoint = "sendcommand")]
public static extern int sendcommand(string printercommand);
[DllImport("TSCLIB.dll",EntryPoint = "setup")]
public static extern int setup(string width,string speed,string density,string sensor,string vertical,string offset);
[DllImport("TSCLIB.dll",EntryPoint = "windowsfont")]
public static extern int windowsfont(int x,int y,int fontheight,int rotation,int fontstyle,int fontunderline,string szFaceName,string content);
//開啟印表機埠,並進行相關設定
public static void openportExt()
{
TSCLIB_DLL.openport("Gprinter GP-3120TU");//找打印表機埠
TSCLIB_DLL.sendcommand("SIZE 70 mm,50 mm");//設定條碼大小
TSCLIB_DLL.sendcommand("GAP 2 mm,0");//設定條碼間隙
TSCLIB_DLL.sendcommand("SPEED 5");//設定列印速度
TSCLIB_DLL.sendcommand("DENSITY 8");//設定墨汁濃度
TSCLIB_DLL.sendcommand("DERECTION 1");//設定相對起點
TSCLIB_DLL.sendcommand("REFERENCE 3 mm,3 mm");//設定偏移邊框
TSCLIB_DLL.sendcommand("CLS");//清除記憶（每次列印新的條碼時先清除上一次的列印記憶）
}
//列印在二維碼
public static void printVehicleCode(string name,string department,string seat_area,string qrcode)
{
TSCLIB_DLL.sendcommand("CLS");//需要清除上一次的列印記憶
TSCLIB_DLL.sendcommand("QRCODE 207,180,L,6,A,M2,S3,\"" + qrcode + "\"");
TSCLIB_DLL.windowsfont(200,30,60,2,"Microsoft YaHei",name);
TSCLIB_DLL.windowsfont(210,100,department);
TSCLIB_DLL.windowsfont(20,320,40,seat_area);
TSCLIB_DLL.printlabel("1","1");
}
//關閉印表機埠
public static void closeportExt()
{
TSCLIB_DLL.closeport();
}
}
}4.呼叫列印
TSCLIB_DLL.openportExt(); //Open specified printer driver TSCLIB_DLL.printVehicleCode(“測試”,“測試”,"測試",“二維碼內容”); TSCLIB_DLL.closeport();
總結
以上所述是小編給大家介紹的C#實現掃描槍掃描二維碼並列印，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回覆大家的。在此也非常感謝大家對我們網站的支援！
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