ZPL打印机.NET代码

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    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;

    using System.Text;
    using System.IO;
    using System.Drawing;
    using System.Drawing.Printing;
    using System.Runtime.InteropServices;

    namespace BarCodePrintApi
    {
    public 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;
    }

    /// <summary>
    /// 发送文件到打印机
    /// </summary>
    /// <param name="szPrinterName">打印机名称</param>
    /// <param name="szFileName">文件</param>
    /// <returns></returns>
    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;
    }

    /// <summary>
    /// 发送字符串到打印机
    /// </summary>
    /// <param name="szPrinterName">打印机名称</param>
    /// <param name="szString">指令</param>
    /// <returns></returns>
    public static bool SendStringToPrinter1(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.
    //Encoding.GetEncoding("GB2312").GetBytes(szString);
    pBytes = Marshal.StringToCoTaskMemAnsi(szString);


    // Send the converted ANSI string to the printer.
    SendBytesToPrinter(szPrinterName, pBytes, dwCount);
    Marshal.FreeCoTaskMem(pBytes);
    return true;
    }
    /// <summary>
    /// 打印标签带有中文字符的ZPL指令
    /// </summary>
    /// <param name="printerName">打印机名称</param>
    /// <param name="szString">指令</param>
    /// <returns></returns>
    public static string SendStringToPrinter(string printerName, string szString)
    {
    byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(szString); //转换格式
    IntPtr ptr = Marshal.AllocHGlobal(bytes.Length + 2);
    try
    {
    Marshal.Copy(bytes, 0, ptr, bytes.Length);
    SendBytesToPrinter(printerName, ptr, bytes.Length);
    return "success";
    }
    catch(Exception ex)
    {
    return ex.Message;
    }
    finally
    {
    Marshal.FreeCoTaskMem(ptr);
    }
    }

    /// <summary>
    /// 网络打印
    /// </summary>
    /// <param name="ip"></param>
    /// <param name="port"></param>
    /// <param name="szString"></param>
    /// <returns></returns>
    public static string SendStringToNetPrinter(string ip, int port, string szString)
    {
    try
    {
    //打开连接
    System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
    client.Connect(ip, port);

    //写入zpl命令
    System.IO.StreamWriter writer = new System.IO.StreamWriter(client.GetStream());
    writer.Write(szString);
    writer.Flush();

    //关闭连接
    writer.Close();
    client.Close();

    return "success";
    }
    catch (Exception ex)
    {
    return ex.Message;
    }
    }
    }
    }


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