C# LPT操作列印條碼

  條碼列印一般是通過指令或圖片方式來列印，圖片方式有fastreport

，不過本人未曾找到VS調用它的方式，僅在Delphi 7中成功的使用。而

實際上大多數的條碼印表機製造商都有一套他們自己的列印指令語言，

通過該語言，可以無需驅動，直接列印，並且操作也很簡單，只需要將

指令送入印表機中就好。

  VS中存在Com口操作的控制項，卻未有現成的LPT連接埠控制項，而相對COM

口來說，LPT的速度要快，所以在列印的時候客戶一般選擇LPT通訊方式

，經過網上的一些查閱，終於實現了LPT口的列印，印表機為Zebra，寫

出來與大家分享。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace PrintDemo
{
    public partial class Form1 : Form
    {  
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            tbBarCode.Focus();
        }

        private void tbBarCode_KeyDown(object sender,

KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Enter:
                    PrintBarcode(tbBarCode.Text.Trim());
                    tbBarCode.Text = "";
                    tbBarCode.Focus();
                    break;
                default:
                    break;
            }
        }
        private void PrintBarcode(string Barcode)
        {
            Barcode = "^XA^FO48,12^BY4^BCN,152,N,N^FD>;" +

Barcode.Trim() + "^FS^FT62,220^CI0^ABN,44,28^FD" +

Barcode.Trim() + "^FS^PQ1,0,1,Y^XZ";
            PrintDemo.POSPrinter prn = new

PrintDemo.POSPrinter("LPT1");
            string strmsg = prn.PrintLine(Barcode);
            if (strmsg != "")
            {
                MessageBox.Show(strmsg);
            }
        }
    }
}
 

其中類POSPrinter定義如下

namespace PrintDemo
{
    class POSPrinter
    {
        const int OPEN_EXISTING = 3;
        string prnPort = "LPT1";
        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private static extern IntPtr CreateFile(string

lpFileName,
        int dwDesiredAccess,
        int dwShareMode,
        int lpSecurityAttributes,
        int dwCreationDisposition,
        int dwFlagsAndAttributes,
        int hTemplateFile);

        public POSPrinter()
        {
            //   
            //   TODO:   在此處添加建構函式邏輯   
            //   
        }

        public POSPrinter(string prnPort)
        {
            this.prnPort = prnPort;//印表機連接埠   
        }

        public string PrintLine(string str)
        {

            IntPtr iHandle = CreateFile(prnPort, 0x40000000,

0, 0, OPEN_EXISTING, 0, 0);
            if (iHandle.ToInt32() == -1)
            {
                return "LPT1 Port Open Failed";
            }
            else
            {

                FileStream fs = new FileStream(iHandle,

FileAccess.ReadWrite);
                StreamWriter sw = new StreamWriter(fs,

System.Text.Encoding.Default);   //寫資料   
                sw.WriteLine(str);
                sw.Close();
                fs.Close();
                return "";
            }
        }
    }  
}