[DllImport("fnthex32.dll")]public static extern int GETFONTHEX(string BarcodeText,string FontName,string FileName,int Orient,int Height,int Width,int IsBold,int IsItalic,StringBuilder ReturnBarcodeCMD);

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;namespace Barcode
{class BarcodePrint{[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 int iHandle;public bool Open(){iHandle = CreateFile("LPT1:", (uint)FileAccess.ReadWrite, 0, 0, (int)FileMode.Open, 0, 0);if (iHandle != -1){return true;}else{return false;}}public 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 bool Close(){return CloseHandle(iHandle);}}
}

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
using System.Runtime.InteropServices;namespace ZPLPrinter
{class RawPrinterHelper{// Structure and API declarions:[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]public class DOCINFOA{[MarshalAs(UnmanagedType.LPStr)]public string pDocName;[MarshalAs(UnmanagedType.LPStr)]public string pOutputFile;[MarshalAs(UnmanagedType.LPStr)]public string pDataType;}[DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter, out IntPtr hPrinter, IntPtr pd);[DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool ClosePrinter(IntPtr hPrinter);[DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool StartDocPrinter(IntPtr hPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DOCINFOA di);[DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool EndDocPrinter(IntPtr hPrinter);[DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool StartPagePrinter(IntPtr hPrinter);[DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool EndPagePrinter(IntPtr hPrinter);[DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]public static extern bool WritePrinter(IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, out Int32 dwWritten);// SendBytesToPrinter()// When the function is given a printer name and an unmanaged array// of bytes, the function sends those bytes to the print queue.// Returns true on success, false on failure.public static bool SendBytesToPrinter(string szPrinterName, IntPtr pBytes, Int32 dwCount){Int32 dwError = 0, dwWritten = 0;IntPtr hPrinter = new IntPtr(0);DOCINFOA di = new DOCINFOA();bool bSuccess = false; // Assume failure unless you specifically succeed.di.pDocName = "My C#.NET RAW Document";di.pDataType = "RAW";// Open the printer.if (OpenPrinter(szPrinterName.Normalize(), out hPrinter, IntPtr.Zero)){// Start a document.if (StartDocPrinter(hPrinter, 1, di)){// Start a page.if (StartPagePrinter(hPrinter)){// Write your bytes.bSuccess = WritePrinter(hPrinter, pBytes, dwCount, out dwWritten);EndPagePrinter(hPrinter);}EndDocPrinter(hPrinter);}ClosePrinter(hPrinter);}// If you did not succeed, GetLastError may give more information// about why not.if (bSuccess == false){dwError = Marshal.GetLastWin32Error();}return bSuccess;}public static bool SendFileToPrinter(string szPrinterName, string szFileName){// Open the file.FileStream fs = new FileStream(szFileName, FileMode.Open);// Create a BinaryReader on the file.BinaryReader br = new BinaryReader(fs);// Dim an array of bytes big enough to hold the file's contents.Byte[] bytes = new Byte[fs.Length];bool bSuccess = false;// Your unmanaged pointer.IntPtr pUnmanagedBytes = new IntPtr(0);int nLength;nLength = Convert.ToInt32(fs.Length);// Read the contents of the file into the array.bytes = br.ReadBytes(nLength);// Allocate some unmanaged memory for those bytes.pUnmanagedBytes = Marshal.AllocCoTaskMem(nLength);// Copy the managed byte array into the unmanaged array.Marshal.Copy(bytes, 0, pUnmanagedBytes, nLength);// Send the unmanaged bytes to the printer.bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, nLength);// Free the unmanaged memory that you allocated earlier.Marshal.FreeCoTaskMem(pUnmanagedBytes);return bSuccess;}public static bool SendStringToPrinter(string szPrinterName, string szString){IntPtr pBytes;Int32 dwCount;// How many characters are in the string?dwCount = szString.Length;// Assume that the printer is expecting ANSI text, and then convert// the string to ANSI text.pBytes = Marshal.StringToCoTaskMemAnsi(szString);// Send the converted ANSI string to the printer.SendBytesToPrinter(szPrinterName, pBytes, dwCount);Marshal.FreeCoTaskMem(pBytes);return true;}}
}

 string sBarCodeCMD = "";            //条码打印命令
            //多行汉字打印            StringBuilder strbd1 = new StringBuilder(10240);StringBuilder strbd2= new StringBuilder(10240);StringBuilder strbd3 = new StringBuilder(10240);StringBuilder strbd4 = new StringBuilder(10240);int i1 = GETFONTHEX("打印的文字", "宋体", "temp1", 0, 30,20, 0, 0, strbd1);int i2 = GETFONTHEX("XXX：", "宋体", "temp2", 0, 20,15, 0, 0, strbd2);int i3 = GETFONTHEX("XX：", "宋体", "temp3", 0, 20,15, 0, 0, strbd3);int i4 = GETFONTHEX("XX："+DateTime.Now+"", "宋体", "temp4", 0, 20, 15, 0, 0, strbd4);sBarCodeCMD = strbd1.ToString() + strbd2.ToString() + strbd3.ToString() + strbd4.ToString() + @"^XA^MD30^LH20,20^FO80,200^XGtemp1,1,1^FS ^LH20,20^FO80,240^GB620,0,2^FS ^LH20,20^FO80,260^XGtemp2,1,1^FS ^LH20,20^FO80,290^XGtemp3,1,1^FS^LH20,20^FO80,320^GB620,0,2^FS ^LH20,20^FO80,350^BY1.5,3,100 ^BCN,100,Y,N,N^FD370921000001013090312024^FS^LH20,20^FO80,480^XGtemp4,1,1^FS^XZ";RawPrinterHelper.SendStringToPrinter("ZDesigner GK888t (EPL)", sBarCodeCMD);