I want to print labels on a printer that includes ZPL.
The printer is connected to USB.
I tried this code using the SendStringToUsbPrinter function as entry point.
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);
}
}
}
It worked for a while and then without changing the code, at least it doesn't seem to me, nothing prints anymore.
If in the properties of the printer I activate the spooler, the .SHD and .SPL files are well present, except that the .SPL file remains at 0k.
When I replace the RAW argument by TEXT in the code, I can see the size of this file changing before the ZPL code is printed.
When I disable the printer spooler, I get the same result.
The string send in the input string
^XA\r^PR2\r^A0N,58,58^FO36,40^CI0^FD\rLot :\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\rCarton 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"
I also tried with the Vanara library which code is quite the same but it's the same.
