通过USB将原始ZPL发送到Zebra打印机

Question

通常,当我将Zebra LP 2844-Z插入USB端口时,计算机将其视为打印机,我可以像其他任何通用打印机一样从记事本打印到它.但是,我的应用程序有一些条形码功能.我的应用程序解析一些输入并生成内存中的ZPL字符串.如何将此ZPL数据发送到USB设备？

Answer 1

我找到了答案......或者至少是最简单的答案(如果有多个答案).当我安装打印机时,我将其重命名为"ICS Label Printer".以下是如何更改允许传递ZPL命令的选项:

1. 右键单击"ICS Label Printer"并选择"属性".
2. 在"常规"选项卡上,单击"打印首选项..."按钮.
3. 在"高级设置"选项卡上,单击"其他"按钮.
4. 确保选中标有"启用直通模式"的复选框.
5. 确保"开始序列:"为"$ {".
6. 确保"结束序列:"为"} $".
7. 单击"关闭"按钮.
8. 单击"确定"按钮.
9. 单击"确定"按钮.

在我的代码中,我只需要将"$ {"添加到我的ZPL的开头,将"} $"添加到结尾,然后将其打印为纯文本.这是"用于ZDesigner LP 2844-Z打印机版本2.6.42(Build 2382)的Windows驱动程序".奇迹般有效!

Answer 2

我发现通过COM端口写入Zebra打印机的方法更简单.我去了Windows控制面板并添加了一台新打印机.对于端口,我选择了COM1(打印机插入的端口).我使用了"Generic/Text Only"打印机驱动程序.我禁用了打印假脱机程序(打印机首选项中的标准选项)以及所有高级打印选项.现在,我可以只打印任何字符串到该打印机,如果字符串包含ZPL,打印机就会使ZPL正常!不需要特殊的"开始序列"或像这样的时髦的东西.耶和简单!

Answer 3

Visual Studio C#解决方案(可在http://support.microsoft.com/kb/322091找到)

步骤1.) 创建类RawPrinterHelper ...

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, 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;
    }
}

步骤2.)创建一个带有文本框和按钮的表单(文本框将保存ZPL以在此示例中发送).在按钮点击事件中添加代码...

private void button1_Click(object sender, EventArgs e)
        {
            // Allow the user to select a printer.
            PrintDialog pd = new PrintDialog();
            pd.PrinterSettings = new PrinterSettings();
            if (DialogResult.OK == pd.ShowDialog(this))
            {
                // Send a printer-specific to the printer.
                RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, textBox1.Text);
                MessageBox.Show("Data sent to printer.");
            }
            else
            {
                MessageBox.Show("Data not sent to printer.");
            }
        }

使用此解决方案,您可以调整以满足特定要求.也许硬编码特定的打印机.也许是动态地从文本框中导出ZPL文本.随你.也许您不需要图形界面,但这显示了如何发送ZPL.您的使用取决于您的需求.

Answer 4

你还没有提到一种语言,所以我将给你一些提示,告诉你如何使用C中的直接Windows API.

首先,打开与打印机的连接OpenPrinter.接下来,启动一个文档,StartDocPrinter其结构pDatatype字段DOC_INFO_1设置为"RAW"- 这告诉打印机驱动程序不要对打印机进行任何编码,而是将其传递给未更改的文件.使用StartPagePrinter指示的第一页,WritePrinter将数据发送到打印机,并与关闭EndPagePrinter,EndDocPrinter并ClosePrinter在完成时.

Answer 5

ZPL 是正确的方法。在大多数情况下，使用抽象为 GDI 命令的驱动程序是正确的；但是 Zebra 标签打印机是一个特例。打印到 Zebra 打印机的最佳方式是直接生成 ZPL。请注意，Zebra 打印机的实际打印机驱动程序是“纯文本”打印机 - 没有可以更新或更改的“驱动程序”，因为我们认为大多数打印机都有驱动程序。它只是绝对极简意义上的驱动程序。