c# - 用于打印条码标签的 Zebra Printer C# 代码

Question

这是我的 *.prn 文件:

I8,A,001 Q0001,0q831rNS5D10ZTJFOR20,0f100NB775,188,2,1,2,6,160,B,"SM00020000"X0,199,1,0,200P1

SM00020000 being the barcode.

string s = "I8,A,001\n\n\nQ0001,0\nq831\nrN\nS5\nD10\nZT\nJF\nO\nR20,0\nf100\nN\nB775,188,2,1,2,6,160,B,\"SM00020000\",199,1,0,200\nP1\n";

PrintDialog pd = new new PrintDialog();
pd.PrinterSettings = new System.Drawing.Printing.
pd.PrinterSettings.PrinterName = "ZDesigner GT800 (EPL)";
RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, s);

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;
}

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;
}

此代码无法帮助我打印标签。文档进入打印队列，但之后没有任何反应。尽管打印机已正确配置并且我已使用 Zebra Designer 成功打印。

另外，我希望上面的代码能够在一行中打印 3 个标签，因为我的介质在一行中有 3 个标签。如何实现？

我的打印机型号是 ZDesigner GT800 (EPL)。

Answer 1

这是一个用于将字节发送到打印机的 Microsoft 类。开箱即用:

    using System;
using System.IO;
using System.Runtime.InteropServices;

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, int 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, int dwCount, out int 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, int dwCount)
    {
        int 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;
        int dwCount;

        // How many characters are in the string?
        // Fix from Nicholas Piasecki:
        // dwCount = szString.Length;
        dwCount = (szString.Length + 1) * Marshal.SystemMaxDBCSCharSize;

        // 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;
    }
}

之后格式化您的 ZPL 请求并将其发送到打印类:

     StringBuilder ZplBuilder = new StringBuilder();

    // Exemple ZPL String

                        ZplBuilder.Append("^XA");   //Start ZPL
                        ZplBuilder.Append("^FO320,42^APN,48,48^FD").Append(DateTime.Now.Date.ToString("dd/MM/yyyy")).Append("^FS");
ZplBuilder.Append("^FO0,304^GB720,168,1^FS");
ZplBuilder.Append("^FO0,306^GD720,166,1,B,L^FS");
ZplBuilder.Append("^FO0,306^GD720,166,1,B,R^FS");
ZplBuilder.Append("^XZ"); 
    // End ZPL

string ZplString = ZplBuilder.ToString();

MemoryStream lmemStream = new MemoryStream();

StreamWriter lstreamWriter = new StreamWriter(lmemStream);
lstreamWriter.Write(ZplString);
lstreamWriter.Flush();
lmemStream.Position = 0;

byte[] byteArray = lmemStream.ToArray();

IntPtr cpUnmanagedBytes = new IntPtr(0);
int cnLength = byteArray.Length;
cpUnmanagedBytes = Marshal.AllocCoTaskMem(cnLength);
Marshal.Copy(byteArray, 0, cpUnmanagedBytes, cnLength);

RawPrinterHelper.SendBytesToPrinter("Intermec PC43d (203 dpi)", cpUnmanagedBytes, cnLength);
Marshal.FreeCoTaskMem(cpUnmanagedBytes);

它在带有 ZPL Protocel 的 intermec Printec 上运行良好。

希望对您有所帮助。