Question

在你继续将我的问题标记为重复之前，相信我，它不。我已经完成了这里和我提供的几乎所有解决方案仍然无法让我的应用程序工作，所以请你只是好并花些时间来帮助我。

场景：我有一台Zebra RW 420热敏打印机，我想用它来打印带有QR码的优惠券。我正在使用C＃并且已按照Scott Chamberlain here和code here给出的所有帮助将命令发送到打印机。我有EPL2手册以及CPCL和ZPL参考手册，其中包含很多关于如何格式化命令的内容。

问题：我发送的所有命令都是打印为命令的纯文本副本，或者打印机只是挂起，其显示屏上显示小信息图标。我尝试使用Zebra Utilitis发送相同的命令，但仍然得到与我的示例应用程序相同的结果。下面是我的代码片段，请告诉我是否有任何参考库我可能需要它才能使其工作。

private void btnPrint_Click(object sender, RoutedEventArgs e)
    {
        string s = "! 0 200 200 500 1\nB QR 10 100 M 2 U 10\nMA,QR code ABC123\nENDQR\nFORM\nPRINT";

//还尝试了\ r \ n来获得相同结果的换行符。

        // Allow the user to select a printer.
        PrintDialog pd = new PrintDialog();

        if ((bool)pd.ShowDialog())
        {
            var bytes = Encoding.ASCII.GetBytes(s);
            // Send a printer-specific to the printer.
            RawPrinterHelper.SendBytesToPrinter(pd.PrintQueue.FullName, bytes, bytes.Length);
        }
    }

由Scott here

修改的PrinterHelper类

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, byte[] 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, byte[] 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 = "Zebra Label";
        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();
            throw new Win32Exception(dwError);
        }
        return bSuccess;
    }

}

Answer 1

我去年在Zebra ZT230和GX430t打印机上做了很多工作，我发现它们是通过端口9100在TCP套接字上使用ZPL指令更加可靠。

我知道这会使你的谈话方向截然不同，但是尝试过假脱机/ Win32方法，我可以告诉你使用套接字更加可靠。如果您需要一些示例代码，请告诉我。

Answer 2

去年使用KR403写了一个信息亭应用程序。我以前可以成功打印并轮询打印机的状态以查看是否存在是通过usb使用下面的博客文章进行低卡纸等。

http://danielezanoli.blogspot.com/2010/06/usb-communications-with-zebra-printers.html

使用打印假脱机程序（仅打印）

https://sharpzebra.codeplex.com/SourceControl/latest#src/Com.SharpZebra/Printing/RawPrinter.cs

我使用ZebraDesigner进行初始布局。在打印屏幕上在斑马设计师里面有一个打印到文件的选项将您的设计保存为包含ZPL的txt文件。然后我拿了那个文件把它分成几个部分并创建了一个使用a的辅助类 StringBuilder内部因此我可以专注于zpl的某些部分因为看看超过1-2行可能会让人不知所措。

var kioskTicketBuilder = new KioskTicketBuilder();
kioskTicketBuilder.SetPrinterDefaults();
kioskTicketBuilder.DisplayTicketHeader();
kioskTicketBuilder.DisplayInformationHeading(data.Name, data.todaysDate, data.ClientName, data.ClientCode);
kioskTicketBuilder.DisplayMoreStuff()
kioskTicketBuilder.DisplayBarcode(data.TrackingId);
kioskTicketBuilder.EndOfJob();
return kioskTicketBuilder.GetPrintJobToArray();

另外，如果您转到打印机属性＆gt;打印默认值＆gt;工具选项卡有一个选项可以将zpl文件发送到打印机或发送个别命令。这非常适合测试你的zpl分离来自你的申请。

enter image description here

如何在C＃中通过USB使用Zebra RW 420热敏打印机使用命令打印QR码

2 个答案: