c# - 无法打印到包含 ZPL (Zebra) 的打印机

问题描述

我想在包含 ZPL 的打印机上打印标签。
打印机已连接到 USB。我使用函数作为入口点
尝试了这段代码。SendStringToUsbPrinter

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;

namespace Core.Helpers  
{
    public class clsUsb
    {
        [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);

        public void SendBytesToUsbPrinter(string pPrinterName, IntPtr pBytes, Int32 pCount)
        {
            DOCINFOA doc = new DOCINFOA();
            IntPtr hPrinter = new IntPtr(0);
            Int32 iWritten = 0;

            doc.pDocName = "Document";
            doc.pDataType = "RAW";

            try
            {
                //Ouvre l'acces à l'imprimante
                if (OpenPrinter(pPrinterName.Normalize(), out hPrinter, IntPtr.Zero))
                {
                    //Débute l'impression de document
                    StartDocPrinter(hPrinter, 1, doc);
                    if (StartPagePrinter(hPrinter))
                    {
                        //Ecrit les données
                        WritePrinter(hPrinter, pBytes, pCount, out iWritten);
                        EndPagePrinter(hPrinter);
                    }
                    EndDocPrinter(hPrinter);
                    ClosePrinter(hPrinter);
                }
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }
        }

        public void SendStringToUsbPrinter(string pPrinterName, string pData)
        {
            IntPtr pBytes;
            Int32 iCount;

            iCount = pData.Length;
            pBytes = Marshal.StringToCoTaskMemAnsi(pData);
            SendBytesToUsbPrinter(pPrinterName, pBytes, iCount);
            Marshal.FreeCoTaskMem(pBytes);
        }


        public void SendFileToUsbPrinter(string pPrinterName, string pFile)
        {
            //Ouverture du fichier
            FileStream fs = new FileStream(pFile, FileMode.Open);
            //Création du binaire
            BinaryReader br = new BinaryReader(fs);
            //Création d'un tableau d'octets da la longueur du fichier
            Byte[] tab = new byte[fs.Length];
            IntPtr pBytes;
            int iLength;

            iLength = Convert.ToInt32(fs.Length);
            //met le contenu du fichier dans le fichier
            tab = br.ReadBytes(iLength);
            pBytes = Marshal.AllocCoTaskMem(iLength);
            //Copie le tableau
            Marshal.Copy(tab, 0, pBytes, iLength);
            //envoie le tableau à l'impresssion
            SendBytesToUsbPrinter(pPrinterName, pBytes, (uint) iLength);
            //Libère la mémoire
            Marshal.FreeCoTaskMem(pBytes);
        }
    }
}

它工作了一段时间，然后在不更改代码的情况下，至少在我看来，它不再打印了。

如果在打印机的属性中我激活了假脱机程序，.SHD 和 .SPL 文件都存在，除了 .SPL 文件保持在 0k。
当我在代码中用 TEXT 替换 RAW 参数时，我可以看到这个文件的大小在 ZPL 代码打印之前发生了变化。
当我禁用打印机后台处理程序时，我得到相同的结果。

输入字符串中发送的字符串

^XA\r^PR2\r^A0N,58,58^FO36,40^CI0^FD\r批次：\r^FS\r^A0N,58,58^FO144,40^CI0^FD\r210618-0\ n^FS\r^BY2^FO160,104^BCN,64,N,N,N^FD>:\r210618-0\n@\r1\n^FS\r^A0N,58,58^FO180,185 ^CI0^FD\rSPX4.PACK.BB.NN000\n^FS\r^BY2^FO207,256^BCN,64,N,N,N^FD>:\rSPX4.PACK.BB.NN000\n^FS \r^A0N,58,58^FO35,414^CI28^FH^FD\r纸箱 n_C3_B8:\r^FS\r^A0N,58,58^FO35,485^CI28^FH^FD\rQuantit_C3_A9:\r^ FS\r^A0N,58,58^FO35,345^CI0^FD1er IMEI: \r2\n^FS\r^A0N,58,58^FO308,485^CI0^FD\r5\n^FS\r^ A0N,58,58^FO308,414^CI0^FD\r1\n^FS\r^BY3^FO540,380^BEN,102,Y^FD\r3700764701584\n^FS\r^PQ1,0,1, Y\r^XZ\r"

我还尝试使用 Vanara 库，它的代码完全相同，但它是相同的。

标签： c#zpl

c# - 无法打印到包含 ZPL (Zebra) 的打印机

问题描述

解决方案

推荐阅读