C#通过并口连接斑马打印机

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using System.Drawing;using System.Drawing.Printing;using System.Windows.Forms;using System.Runtime.InteropServices;namespace BarCode{   public class BarCode    {        [System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]        private struct OVERLAPPED        {            int Internal;            int InternalHigh;            int Offset;            int OffSetHigh;            int hEvent;        }        [System.Runtime.InteropServices.DllImport("kernel32.dll")]        private static extern int CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);        [System.Runtime.InteropServices.DllImport("kernel32.dll")]        private static extern bool WriteFile(int hFile, byte[] lpBuffer, int nNumberOfBytesToWrite, out int lpNumberOfBytesWritten, out OVERLAPPED lpOverlapped);        [System.Runtime.InteropServices.DllImport("kernel32.dll")]        private static extern bool CloseHandle(int hObject);        private static int iHandle;         public static bool Open()        {            iHandle = CreateFile("LPT1:", (uint)FileAccess.ReadWrite, 0, 0, (int)FileMode.Open, 0, 0);            if (iHandle != -1)            {                return true;            }            else            {                return false;            }        }        public static bool Write(string Mystring)        {            if (iHandle != -1)            {                int i;                OVERLAPPED x;                byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);                return WriteFile(iHandle, mybyte, mybyte.Length, out i, out x);            }            else            {                throw new Exception("LPT1端口未打开!");            }        }        public static bool Close()        {            return CloseHandle(iHandle);        }        [DllImport("fnthex32.dll")]        public static extern int GETFONTHEX(                              string BarcodeText,                              string FontName,                              string FileName,                              int Orient,//方向                              int Height,                              int Width,                              int IsBold,                              int IsItalic,                              StringBuilder ReturnBarcodeCMD);     }}
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