问题
This is my *.prn file:
I8,A,001 Q0001,0 q831 rN S5 D10 ZT JF O R20,0 f100 N B775,188,2,1,2,6,160,B,"SM00020000" X0,199,1,0,200 P1
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;
}
This code is not helping me print my label. The document goes to the print queue but nothing happens after that. Although the printer is correctly configured and I have successfully printed with Zebra Designer.
Also I'd like the above code such that it prints 3 labels in one row, since I have the media which has 3 stickers in one row. How can that be achieved?
My printer model is ZDesigner GT800 (EPL).
回答1:
Here's a Microsoft class for sending bytes to printer. It's ready to use out of the box:
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;
}
}
After that Format your ZPL request and send it to the Print Class:
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);
It works fine on an intermec Printec with ZPL Protocel.
I hope this will help.
回答2:
This is what we do.
namespace SafeHandles
{
public class PrinterSafeHandle : global::Microsoft.Win32.SafeHandles.SafeHandleZeroOrMinusOneIsInvalid
{
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern bool OpenPrinter(string pPrinterName, out IntPtr phPrinter, IntPtr pDefault);
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true, ExactSpelling=true)]
private static extern bool ClosePrinter(IntPtr hPrinter);
public PrinterSafeHandle(string PrinterName) : base(true)
{
if (!OpenPrinter(PrinterName, out this.handle, IntPtr.Zero))
{
throw new System.ComponentModel.Win32Exception();
}
}
protected override bool ReleaseHandle()
{
return ClosePrinter(this.handle);
}
}
}
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern bool WritePrinter (SafeHandles.PrinterSafeHandle hPrinter, [In, MarshalAs(UnmanagedType.LPArray)] byte[] pBuf, int cdBuf, out int pcWritten);
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern bool WritePrinter (SafeHandles.PrinterSafeHandle hPrinter, IntPtr pBuf, int cdBuf, out int pcWritten);
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern int StartDocPrinter(SafeHandles.PrinterSafeHandle hPrinter, int Level, [In] ref DOC_INFO_1 pDocInfo);
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern bool EndDocPrinter (SafeHandles.PrinterSafeHandle hPrinter);
[DllImport("winspool.drv", CharSet=CharSet.Auto, SetLastError=true)]
private static extern bool SetJob (SafeHandles.PrinterSafeHandle hPrinter, int JobID, int Level, IntPtr pJob, int Command);
private const int JOB_CONTROL_PAUSE = 1;
private const int JOB_CONTROL_DELETE = 5;
[StructLayout(LayoutKind.Sequential)]
private struct DOC_INFO_1
{
[MarshalAs(UnmanagedType.LPTStr)] public string pDocName;
[MarshalAs(UnmanagedType.LPTStr)] public string pOutputFile;
[MarshalAs(UnmanagedType.LPTStr)] public string pDatatype;
}
public static int SendPrinterCommand(string PrinterName, string DocumentName, string Command, bool Suspended = false)
{
return SendPrinterCommand(null, PrinterName, DocumentName, Command, Suspended);
}
public static int SendPrinterCommand(string PrinterName, string DocumentName, string Command, System.Text.Encoding Encoding, bool Suspended = false)
{
return SendPrinterCommand(null, PrinterName, DocumentName, Command, Encoding, Suspended);
}
public static int SendPrinterCommand(string PrinterName, string DocumentName, byte[] Command, bool Suspended = false)
{
return SendPrinterCommand(null, PrinterName, DocumentName, Command, Suspended);
}
public static int SendPrinterCommand(string ServerName, string PrinterName, string DocumentName, string Command, bool Suspended = false)
{
return SendPrinterCommand(ServerName, PrinterName, DocumentName, Command, System.Text.Encoding.ASCII, Suspended);
}
public static int SendPrinterCommand(string ServerName, string PrinterName, string DocumentName, string Command, System.Text.Encoding Encoding, bool Suspended = false)
{
return SendPrinterCommand(ServerName, PrinterName, DocumentName, Encoding.GetBytes(Command), Suspended);
}
public static int SendPrinterCommand(string ServerName, string PrinterName, string DocumentName, byte[] Command, bool Suspended = false)
{
string FullPrinterPath = string.IsNullOrEmpty(ServerName) ? PrinterName : System.IO.Path.Combine(ServerName, PrinterName);
using (var h = new SafeHandles.PrinterSafeHandle(FullPrinterPath))
{
var di1 = new DOC_INFO_1()
{
pDocName = DocumentName,
pOutputFile = null,
pDatatype = "RAW"
};
int job_id = StartDocPrinter(h, 1, ref di1);
if (job_id == 0)
{
throw new System.ComponentModel.Win32Exception();
}
if (Suspended)
{
if (!SetJob(h, job_id, 0, IntPtr.Zero, JOB_CONTROL_PAUSE))
{
throw new System.ComponentModel.Win32Exception();
}
}
try
{
int total_bytes_written = 0;
if (!WritePrinter(h, Command, Command.Length, out total_bytes_written))
{
throw new System.ComponentModel.Win32Exception();
}
if (total_bytes_written < Command.Length)
{
var gch = GCHandle.Alloc(Command, GCHandleType.Pinned);
try
{
do
{
int next_index = total_bytes_written;
int next_requred_len = Command.Length - next_index;
int bytes_written_this_time = 0;
if (!WritePrinter(h, Marshal.UnsafeAddrOfPinnedArrayElement(Command, next_index), next_requred_len, out bytes_written_this_time))
{
throw new System.ComponentModel.Win32Exception();
}
total_bytes_written += bytes_written_this_time;
} while (total_bytes_written < Command.Length);
}
finally
{
gch.Free();
}
}
}
catch
{
SetJob(h, job_id, 0, IntPtr.Zero, JOB_CONTROL_DELETE);
throw;
}
finally
{
EndDocPrinter(h);
}
return job_id;
}
}
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";
SendPrinterCommand("ZDesigner GT800 (EPL)", "Foo", s);
回答3:
I would suggest not reinventing the wheel. Take a look at third-party libraries that already do this. For example, ThermalLabel SDK. It's a paid library, but it does well. You might even find some free/open-source ones out there as well.
回答4:
If any of these does not work, you can write your zpl commands into a file using c# and directly copy it to the printer, if it is shared in network.
public void Print(int numCopies = 1)
{
int randomInt = (new Random()).Next(1000); //this random value is intented to get the collision change of prn file names reduced
string SERVERPATH = Path.Combine(System.Web.HttpContext.Current.Server.MapPath("~/PrintOperations/"));
if (!Directory.Exists(SERVERPATH))
{
Directory.CreateDirectory(SERVERPATH);
}
String prnFilePath = SERVERPATH + MethodName + randomInt + ".prn";
String fullPrinterPath = @"\\"+ServerName+@"\"+ printerName;
var createdFile = System.IO.File.Create(prnFilePath);
createdFile.Close();
System.IO.File.WriteAllText(prnFilePath, parsedZpl);
System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
startInfo.FileName = "cmd.exe";
startInfo.Arguments = string.Format("/C Copy \"{0}\" \"{1}\"", prnFilePath ,fullPrinterPath);
process.StartInfo = startInfo;
for (int i =0; i< numCopies; i++)
{
process.Start();
process.WaitForExit();
}
System.IO.File.Delete(prnFilePath);
}
来源：https://stackoverflow.com/questions/36803821/zebra-printer-c-sharp-code-to-print-barcode-label