C#调用斑马打印机打印条码标签(支持COM/LPT/USB/ZPL/EPL/Bitmap)

利用标签设计软件做好模板，打印至本地文件，把其中的ZPL、EPL指令拷贝出来，替换其中动态变化的内容为变量名，做成一个模板文本，在代码中动态替换变量，再把指令输出至打印机。
ZebraPrintHelper.cs。
[csharp]  view plain copy  
 using System;  
 using System.Collections.Generic;  
 using System.Drawing;  
 using System.Drawing.Imaging;  
 using System.Drawing.Printing;  
 using System.IO;  
 using System.IO.Ports;  
 using System.Linq;  
 using System.Runtime.InteropServices;  
 using System.Text;  
 using Microsoft.Win32.SafeHandles;  
   
 namespace Umisky.HTServer.Util  
 {  
     #region 定义设备类型枚举  
     public enum DeviceType  
     {  
         COM = 0,  
         LPT = 1,  
         DRV = 2  
     }  
     #endregion  
  
     #region 定义打印机指令类型枚举  
     public enum ProgrammingLanguage  
     {  
         ZPL = 0,  
         EPL = 1  
     }  
     #endregion  
  
     #region 定义日志类型枚举  
     public enum LogType  
     {  
         Print = 0,  
         Error = 1  
     }  
     #endregion  
  
     #region 定义打印文档信息类  
     [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]  
     public class DocInfo  
     {  
         [MarshalAs(UnmanagedType.LPStr)]  
         public string DocName;  
         [MarshalAs(UnmanagedType.LPStr)]  
         public string OutputFile;  
         [MarshalAs(UnmanagedType.LPStr)]  
         public string DataType;  
     }  
     #endregion  
  
     #region 定义图像设备信息类  
     public class DeviceInfo  
     {  
         #region 属性说明  
         /* 
         ColorDepth  
             图像输出支持的颜色范围的像素深度。有效值为 1、4、8、24 和 32。默认值为 24。仅对 TIFF 呈现支持 ColorDepth，对于其他图像输出格式报表服务器将忽略此设置。 
  
         注意：  
         对于此版本的 SQL Server，此设置的值将被忽略，且通常将 TIFF 图像呈现为 24 位。 
   
         Columns  
             要为报表设置的列数。此值将覆盖报表的原始设置。 
   
         ColumnSpacing  
             要为报表设置的列间距。此值将覆盖报表的原始设置。 
   
         DpiX  
             输出设备在 X 方向的分辨率。默认值为 96。 
   
         DpiY  
             输出设备在 Y 方向的分辨率。默认值为 96。 
   
         EndPage  
             要呈现的报表的最后一页。默认值为 StartPage 的值。 
   
         MarginBottom  
             要为报表设置的下边距值，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，1in）。此值将覆盖报表的原始设置。 
   
         MarginLeft  
             要为报表设置的左边距值，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，1in）。此值将覆盖报表的原始设置。 
   
         MarginRight  
             要为报表设置的右边距值，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，1in）。此值将覆盖报表的原始设置。 
   
         MarginTop  
             要为报表设置的上边距值，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，1in）。此值将覆盖报表的原始设置。 
   
         OutputFormat  
             图形设备接口 (GDI) 支持的输出格式之一：BMP、EMF、GIF、JPEG、PNG 或 TIFF。 
   
         PageHeight  
             要为报表设置的页高，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，11in）。此值将覆盖报表的原始设置。 
   
         PageWidth  
             要为报表设置的页宽，以英寸为单位。您必须包含一个整数或小数值，后跟“in”（例如，8.5in）。此值将覆盖报表的原始设置。 
   
         StartPage  
             要呈现的报告的第一页。值为 0 指示将呈现所有页。默认值为 1。  
          */  
         #endregion  
   
         public enum GDIOutputFormat { BMP, EMF, GIF, JPEG, PNG, TIFF }  
   
         public int ColorDepth { get; set; }  
         public int Columns { get; set; }  
         public int ColumnSpacing { get; set; }  
         public int DpiX { get; set; }  
         public int DpiY { get; set; }  
         public int EndPage { get; set; }  
         public int MarginBottom { get; set; }  
         public int MarginLeft { get; set; }  
         public int MarginRight { get; set; }  
         public int MarginTop { get; set; }  
         public GDIOutputFormat OutputFormat { get; set; }  
         public int PageHeight { get; set; }  
         public int PageWidth { get; set; }  
         public int StartPage { get; set; }  
   
         private const string xmlFormater = @"<DeviceInfo>  
                 <ColorDepth>{0}</ColorDepth>  
                 <Columns>{1}</Columns>  
                 <ColumnSpacing>{2}</ColumnSpacing>  
                 <DpiX>{3}</DpiX>  
                 <DpiY>{4}</DpiY>  
                 <EndPage>{5}</EndPage>  
                 <MarginBottom>{6}</MarginBottom>  
                 <MarginLeft>{7}</MarginLeft>  
                 <MarginRight>{8}</MarginRight>  
                 <MarginTop>{9}</MarginTop>  
                 <OutputFormat>{10}</OutputFormat>  
                 <PageHeight>{11}</PageHeight>  
                 <PageWidth>{12}</PageWidth>  
                 <StartPage>{13}</StartPage>  
                 </DeviceInfo>";  
   
         public DeviceInfo()  
         {  
             this.ColorDepth = 24;  
             this.Columns = 0;  
             this.StartPage = 1;  
             this.EndPage = 1;  
         }  
   
         public string GetDeviceInfo()  
         {  
             string result = string.Format(xmlFormater,  
                 this.ColorDepth,  
                 this.Columns,  
                 this.ColumnSpacing,  
                 this.DpiX,  
                 this.DpiY,  
                 this.EndPage,  
                 this.MarginBottom,  
                 this.MarginLeft,  
                 this.MarginRight,  
                 this.MarginTop,  
                 this.OutputFormat,  
                 this.PageHeight,  
                 this.PageWidth,  
                 this.StartPage);  
             return result;  
         }  
   
         public string GetDeviceInfoForImage()  
         {  
             string result = string.Format("<DeviceInfo><StartPage>{0}</StartPage><EndPage>{1}</EndPage><OutputFormat>{2}</OutputFormat><DpiX>{3}</DpiX><DpiY>{4}</DpiY></DeviceInfo>",  
                 this.StartPage,  
                 this.EndPage,  
                 this.OutputFormat,  
                 this.DpiX,  
                 this.DpiY);  
             return result;  
         }  
     }  
     #endregion  
  
     #region 定义斑马打印助手类  
     /// <summary>  
     /// 斑马打印助手，支持LPT/COM/DRV三种模式，适用于标签、票据、条码打印。  
     /// </summary>  
     public static class ZebraPrintHelper  
     {  
         #region 定义API方法  
  
         #region 写打印口(LPT)方法  
         private const short FILE_ATTRIBUTE_NORMAL = 0x80;  
         private const short INVALID_HANDLE_VALUE = -1;  
         private const uint GENERIC_READ = 0x80000000;  
         private const uint GENERIC_WRITE = 0x40000000;  
         private const uint CREATE_NEW = 1;  
         private const uint CREATE_ALWAYS = 2;  
         private const uint OPEN_EXISTING = 3;  
         [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]  
         private static extern SafeFileHandle CreateFile(string strFileName,  
             uint dwDesiredAccess,  
             uint dwShareMode,  
             IntPtr intptrSecurityAttributes,  
             uint dwCreationDisposition,  
             uint dwFlagsAndAttributes,  
             IntPtr intptrTemplateFile);  
         #endregion  
   
         [DllImport("winspool.Drv", EntryPoint = "OpenPrinterA", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string printerName, out IntPtr intptrPrinter, IntPtr intptrPrintDocument);  
   
         [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool ClosePrinter(IntPtr intptrPrinter);  
   
         [DllImport("winspool.Drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool StartDocPrinter(IntPtr intptrPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DocInfo docInfo);  
   
         [DllImport("winspool.Drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool EndDocPrinter(IntPtr intptrPrinter);  
   
         [DllImport("winspool.Drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool StartPagePrinter(IntPtr intptrPrinter);  
   
         [DllImport("winspool.Drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool EndPagePrinter(IntPtr intptrPrinter);  
   
         [DllImport("winspool.Drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]  
         public static extern bool WritePrinter(IntPtr intptrPrinter, IntPtr intptrBytes, Int32 count, out Int32 written);  
         #endregion  
  
         #region 定义私有字段  
   
         /// <summary>  
         /// 线程锁，防止多线程调用。  
         /// </summary>  
         private static object SyncRoot = new object();  
   
         /// <summary>  
         /// 字节流传递时采用的字符编码  
         /// </summary>  
         private static readonly Encoding TransferFormat = Encoding.GetEncoding("iso-8859-1");  
  
         #endregion  
  
         #region 定义属性  
         public static int Port { get; set; }  
         public static string PrinterName { get; set; }  
         public static bool IsWriteLog { get; set; }  
         public static DeviceType PrinterType { get; set; }  
         public static ProgrammingLanguage PrinterProgrammingLanguage { get; set; }  
   
         /// <summary>  
         /// 日志保存目录，WEB应用注意不能放在BIN目录下。  
         /// </summary>  
         public static string LogsDirectory { get; set; }  
   
         private static byte[] GraphBuffer { get; set; }  
         private static int GraphWidth { get; set; }  
         private static int GraphHeight { get; set; }  
   
         private static int RowSize  
         {  
             get  
             {  
                 return (((GraphWidth) + 31) >> 5) << 2;  
             }  
         }  
   
         private static int RowRealBytesCount  
         {  
             get  
             {  
                 if ((GraphWidth % 8) > 0)  
                 {  
                     return GraphWidth / 8 + 1;  
                 }  
                 else  
                 {  
                     return GraphWidth / 8;  
                 }  
             }  
         }  
         #endregion  
  
         #region 静态构造方法  
         static ZebraPrintHelper()  
         {  
             GraphBuffer = new byte[0];  
             IsWriteLog = false;  
             LogsDirectory = "logs";  
         }  
         #endregion  
  
         #region 定义发送原始数据到打印机的方法  
         private static bool SendBytesToPrinter(string printerName, IntPtr intptrBytes, Int32 count)  
         {  
             Int32 error = 0, written = 0;  
             IntPtr intptrPrinter = new IntPtr(0);  
             DocInfo docInfo = new DocInfo();  
             bool bSuccess = false;  
   
             docInfo.DocName = ".NET RAW Document";  
             docInfo.DataType = "RAW";  
   
             // Open the printer.  
             if (OpenPrinter(printerName.Normalize(), out intptrPrinter, IntPtr.Zero))  
             {  
                 // Start a document.  
                 if (StartDocPrinter(intptrPrinter, 1, docInfo))  
                 {  
                     // Start a page.  
                     if (StartPagePrinter(intptrPrinter))  
                     {  
                         // Write your bytes.  
                         bSuccess = WritePrinter(intptrPrinter, intptrBytes, count, out written);  
                         EndPagePrinter(intptrPrinter);  
                     }  
                     EndDocPrinter(intptrPrinter);  
                 }  
                 ClosePrinter(intptrPrinter);  
             }  
             // If you did not succeed, GetLastError may give more information  
             // about why not.  
             if (bSuccess == false)  
             {  
                 error = Marshal.GetLastWin32Error();  
             }  
             return bSuccess;  
         }  
   
         public static bool SendFileToPrinter(string printerName, string fileName)  
         {  
             // Open the file.  
             FileStream fs = new FileStream(fileName, 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(printerName, pUnmanagedBytes, nLength);  
             // Free the unmanaged memory that you allocated earlier.  
             Marshal.FreeCoTaskMem(pUnmanagedBytes);  
             return bSuccess;  
         }  
   
         public static bool SendBytesToPrinter(string printerName, byte[] bytes)  
         {  
             bool bSuccess = false;  
             IntPtr pUnmanagedBytes = new IntPtr(0);  
             int nLength = bytes.Length;  
             // 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(printerName, pUnmanagedBytes, nLength);  
             // Free the unmanaged memory that you allocated earlier.  
             Marshal.FreeCoTaskMem(pUnmanagedBytes);  
             return bSuccess;  
         }  
   
         public static bool SendStringToPrinter(string printerName, string text)  
         {  
             IntPtr pBytes;  
             Int32 dwCount;  
             // How many characters are in the string?  
             dwCount = (text.Length + 1) * Marshal.SystemMaxDBCSCharSize;  
             // Assume that the printer is expecting ANSI text, and then convert  
             // the string to ANSI text.  
             pBytes = Marshal.StringToCoTaskMemAnsi(text);  
             // Send the converted ANSI string to the printer.  
             SendBytesToPrinter(printerName, pBytes, dwCount);  
             Marshal.FreeCoTaskMem(pBytes);  
             return true;  
         }  
         #endregion  
  
         #region 日志记录方法  
         private static void WriteLog(string text, LogType logType)  
         {  
             string endTag = string.Format("\r\n{0}\r\n", new string('=', 80));  
             string path = string.Format("{0}\\{1}-{2}.log", LogsDirectory, DateTime.Now.ToString("yyyy-MM-dd"), logType);  
             if (!Directory.Exists(LogsDirectory))  
             {  
                 Directory.CreateDirectory(LogsDirectory);  
             }  
             if (logType == LogType.Error)  
             {  
                 File.AppendAllText(path, string.Format("{0}{1}", text, endTag), Encoding.Default);  
             }  
             if (logType == LogType.Print)  
             {  
                 if (text.StartsWith("N\r\nGW"))  
                 {  
                     using (FileStream fs = new FileStream(path, FileMode.Append))  
                     {  
                         byte[] bytes = TransferFormat.GetBytes(text);  
                         byte[] tag = TransferFormat.GetBytes(endTag);  
                         fs.Write(bytes, 0, bytes.Length);  
                         fs.Write(tag, 0, tag.Length);  
                         fs.Close();  
                     }  
                 }  
                 else  
                 {  
                     File.AppendAllText(path, string.Format("{0}{1}", text, endTag), Encoding.Default);  
                 }  
             }  
         }  
   
         private static void WriteLog(byte[] bytes, LogType logType)  
         {  
             string endTag = string.Format("\r\n{0}\r\n", new string('=', 80));  
             string path = string.Format("{0}\\{1}-{2}.log", LogsDirectory, DateTime.Now.ToString("yyyy-MM-dd"), logType);  
             if (!Directory.Exists(LogsDirectory))  
             {  
                 Directory.CreateDirectory(LogsDirectory);  
             }  
             if (logType == LogType.Error)  
             {  
                 File.AppendAllText(path, string.Format("{0}{1}", Encoding.Default.GetString(bytes), endTag), Encoding.Default);  
             }  
             if (logType == LogType.Print)  
             {  
                 string transferFormat = TransferFormat.GetString(bytes);  
                 if (transferFormat.StartsWith("N\r\nGW"))  
                 {  
                     using (FileStream fs = new FileStream(path, FileMode.Append))  
                     {  
                         byte[] tag = TransferFormat.GetBytes(endTag);  
                         fs.Write(bytes, 0, bytes.Length);  
                         fs.Write(tag, 0, tag.Length);  
                         fs.Close();  
                     }  
                 }  
                 else  
                 {  
                     File.AppendAllText(path, string.Format("{0}{1}", Encoding.Default.GetString(bytes), endTag), Encoding.Default);  
                 }  
             }  
         }  
         #endregion  
  
         #region 封装方法，方便调用。  
         public static bool PrintWithCOM(string cmd, int port, bool isWriteLog)  
         {  
             PrinterType = DeviceType.COM;  
             Port = port;  
             IsWriteLog = isWriteLog;  
             return PrintCommand(cmd);  
         }  
   
         public static bool PrintWithCOM(byte[] bytes, int port, bool isWriteLog, ProgrammingLanguage progLanguage)  
         {  
             PrinterType = DeviceType.COM;  
             Port = port;  
             IsWriteLog = isWriteLog;  
             PrinterProgrammingLanguage = progLanguage;  
             return PrintGraphics(bytes);  
         }  
   
         public static bool PrintWithLPT(string cmd, int port, bool isWriteLog)  
         {  
             PrinterType = DeviceType.LPT;  
             Port = port;  
             IsWriteLog = isWriteLog;  
             return PrintCommand(cmd);  
         }  
   
         public static bool PrintWithLPT(byte[] bytes, int port, bool isWriteLog, ProgrammingLanguage progLanguage)  
         {  
             PrinterType = DeviceType.LPT;  
             Port = port;  
             IsWriteLog = isWriteLog;  
             PrinterProgrammingLanguage = progLanguage;  
             return PrintGraphics(bytes);  
         }  
   
         public static bool PrintWithDRV(string cmd, string printerName, bool isWriteLog)  
         {  
             PrinterType = DeviceType.DRV;  
             PrinterName = printerName;  
             IsWriteLog = isWriteLog;  
             return PrintCommand(cmd);  
         }  
   
         public static bool PrintWithDRV(byte[] bytes, string printerName, bool isWriteLog, ProgrammingLanguage progLanguage)  
         {  
             PrinterType = DeviceType.DRV;  
             PrinterName = printerName;  
             IsWriteLog = isWriteLog;  
             PrinterProgrammingLanguage = progLanguage;  
             return PrintGraphics(bytes);  
         }  
         #endregion  
  
         #region 打印ZPL、EPL指令  
         public static bool PrintCommand(string cmd)  
         {  
             lock (SyncRoot)  
             {  
                 bool result = false;  
                 try  
                 {  
                     switch (PrinterType)  
                     {  
                         case DeviceType.COM:  
                             result = comPrint(Encoding.Default.GetBytes(cmd));  
                             break;  
                         case DeviceType.LPT:  
                             result = lptPrint(Encoding.Default.GetBytes(cmd));  
                             break;  
                         case DeviceType.DRV:  
                             result = drvPrint(Encoding.Default.GetBytes(cmd));  
                             break;  
                     }  
                     if (!string.IsNullOrEmpty(cmd) && IsWriteLog)  
                     {  
                         WriteLog(cmd, LogType.Print);  
                     }  
                 }  
                 catch (Exception ex)  
                 {  
                     //记录日志  
                     if (IsWriteLog)  
                     {  
                         WriteLog(string.Format("{0} => {1}\r\n{2}", DateTime.Now, ex.Message, ex), LogType.Error);  
                     }  
                 }  
                 finally  
                 {  
                     GraphBuffer = new byte[0];  
                 }  
                 return result;  
             }  
         }  
         #endregion  
  
         #region 打印图像字节流  
         public static bool PrintGraphics(byte[] graph)  
         {  
             lock (SyncRoot)  
             {  
                 bool result = false;  
                 try  
                 {  
                     GraphBuffer = graph;  
                     byte[] cmdBytes = new byte[0];  
                     if (PrinterProgrammingLanguage == ProgrammingLanguage.ZPL)  
                     {  
                         cmdBytes = getZPLBytes();  
                     }  
                     if (PrinterProgrammingLanguage == ProgrammingLanguage.EPL)  
                     {  
                         cmdBytes = getEPLBytes();  
                     }  
                     switch (PrinterType)  
                     {  
                         case DeviceType.COM:  
                             result = comPrint(cmdBytes);  
                             break;  
                         case DeviceType.LPT:  
                             result = lptPrint(cmdBytes);  
                             break;  
                         case DeviceType.DRV:  
                             result = drvPrint(cmdBytes);  
                             break;  
                     }  
                     if (cmdBytes.Length > 0 && IsWriteLog)  
                     {  
                         WriteLog(cmdBytes, LogType.Print);  
                     }  
                 }  
                 catch (Exception ex)  
                 {  
                     //记录日志  
                     if (IsWriteLog)  
                     {  
                         WriteLog(string.Format("{0} => {1}\r\n{2}", DateTime.Now, ex.Message, ex), LogType.Error);  
                     }  
                 }  
                 finally  
                 {  
                     GraphBuffer = new byte[0];  
                 }  
                 return result;  
             }  
         }  
         #endregion  
  
         #region COM/LPT/DRV三种模式打印方法  
         private static bool drvPrint(byte[] cmdBytes)  
         {  
             bool result = false;  
             try  
             {  
                 if (!string.IsNullOrEmpty(PrinterName))  
                 {  
                     result = SendBytesToPrinter(PrinterName, cmdBytes);  
                 }  
             }  
             catch (Exception ex)  
             {  
                 throw ex;  
             }  
             return result;  
         }  
   
         private static bool comPrint(byte[] cmdBytes)  
         {  
             bool result = false;  
             SerialPort com = new SerialPort(string.Format("{0}{1}", PrinterType, Port), 9600, Parity.None, 8, StopBits.One);  
             try  
             {  
                 com.Open();  
                 com.Write(cmdBytes, 0, cmdBytes.Length);  
                 result = true;  
             }  
             catch (Exception ex)  
             {  
                 throw ex;  
             }  
             finally  
             {  
                 if (com.IsOpen)  
                 {  
                     com.Close();  
                 }  
             }  
             return result;  
         }  
   
         private static bool lptPrint(byte[] cmdBytes)  
         {  
             bool result = false;  
             FileStream fileStream = null;  
             StreamWriter streamWriter = null;  
             SafeFileHandle handle = null;  
             try  
             {  
                 handle = CreateFile(string.Format("{0}{1}", PrinterType, Port), GENERIC_WRITE, 0, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);  
                 if (!handle.IsInvalid)  
                 {  
                     fileStream = new FileStream(handle, FileAccess.ReadWrite);  
                     streamWriter = new StreamWriter(fileStream, Encoding.Default);  
                     streamWriter.Write(cmdBytes);  
                     result = true;  
                 }  
             }  
             catch (Exception ex)  
             {  
                 throw ex;  
             }  
             finally  
             {  
                 if (fileStream != null)  
                 {  
                     fileStream.Close();  
                     fileStream = null;  
                 }  
                 if (streamWriter != null)  
                 {  
                     streamWriter.Close();  
                     streamWriter = null;  
                 }  
                 if (handle != null)  
                 {  
                     handle.Close();  
                     handle = null;  
                 }  
             }  
             return result;  
         }  
         #endregion  
  
         #region 生成ZPL图像打印指令  
         private static byte[] getZPLBytes()  
         {  
             byte[] result = new byte[0];  
             byte[] bmpData = getBitmapData();  
             string textBitmap = string.Empty;  
             string textHex = BitConverter.ToString(bmpData).Replace("-", string.Empty);  
             for (int i = 0; i < GraphHeight;i++ )  
             {  
                 textBitmap += textHex.Substring(i * RowRealBytesCount * 2, RowRealBytesCount * 2) + "\r\n";  
             }  
             string text = string.Format("~DGR:IMAGE.GRF,{0},{1},\r\n{2}^XGR:IMAGE.GRF,1,1^FS\r\n^IDR:IMAGE.GRF\r\n",   
                 GraphHeight * RowRealBytesCount,   
                 RowRealBytesCount,   
                 textBitmap);  
             result = Encoding.Default.GetBytes(text);  
             return result;  
         }  
         #endregion  
  
         #region 生成EPL图像打印指令  
         private static byte[] getEPLBytes()  
         {  
             byte[] result = new byte[0];  
             byte[] buffer = getBitmapData();  
             string text = string.Format("N\r\nGW{0},{1},{2},{3},{4}\r\nP\r\n",   
                 0,   
                 0,   
                 RowRealBytesCount,   
                 GraphHeight,   
                 TransferFormat.GetString(buffer));  
             result = TransferFormat.GetBytes(text);  
             return result;  
         }  
         #endregion  
  
         #region 获取单色位图数据  
         /// <summary>  
         /// 获取单色位图数据(1bpp)，不含文件头、信息头、调色板三类数据。  
         /// </summary>  
         /// <returns></returns>  
         private static byte[] getBitmapData()  
         {  
             MemoryStream srcStream = new MemoryStream();  
             MemoryStream dstStream = new MemoryStream();  
             Bitmap srcBmp = null;  
             Bitmap dstBmp = null;  
             byte[] srcBuffer = null;  
             byte[] dstBuffer = null;  
             byte[] result = null;  
             try  
             {  
                 srcStream = new MemoryStream(GraphBuffer);  
                 srcBmp = Bitmap.FromStream(srcStream) as Bitmap;  
                 srcBuffer = srcStream.ToArray();  
                 GraphWidth = srcBmp.Width;  
                 GraphHeight = srcBmp.Height;  
                 dstBmp = srcBmp.Clone(new Rectangle(0, 0, srcBmp.Width, srcBmp.Height), PixelFormat.Format1bppIndexed);  
                 dstBmp.Save(dstStream, ImageFormat.Bmp);  
                 dstBuffer = dstStream.ToArray();  
   
                 int bfSize = BitConverter.ToInt32(dstBuffer, 2);  
                 int bfOffBits = BitConverter.ToInt32(dstBuffer, 10);  
                 int bitmapDataLength = bfSize - bfOffBits;  
                 result = new byte[GraphHeight * RowRealBytesCount];  
   
                 //读取时需要反向读取每行字节实现上下翻转的效果，打印机打印顺序需要这样读取。  
                 for (int i = 0; i < GraphHeight; i++)  
                 {  
                     Array.Copy(dstBuffer, bfOffBits + (GraphHeight - 1 - i) * RowSize, result, i * RowRealBytesCount, RowRealBytesCount);  
                 }  
             }  
             catch (Exception ex)  
             {  
                 throw ex;  
             }  
             finally  
             {  
                 if (srcStream != null)  
                 {  
                     srcStream.Dispose();  
                     srcStream = null;  
                 }  
                 if (dstStream != null)  
                 {  
                     dstStream.Dispose();  
                     dstStream = null;  
                 }  
                 if (srcBmp != null)  
                 {  
                     srcBmp.Dispose();  
                     srcBmp = null;  
                 }  
                 if (dstBmp != null)  
                 {  
                     dstBmp.Dispose();  
                     dstBmp = null;  
                 }  
             }  
             return result;  
         }  
         #endregion  
     }  
     #endregion  
 }  