将ZPL发送到Zebra打印机的.NET代码

Question

有没有办法在.NET中将ZPL（Zebra编程语言）发送到打印机？

我有代码来做到这一点在德尔福，但它不是很漂亮，我宁愿不尝试在.NET中重新创建它，因为它是。

Answer 1

看看这个帖子：Print ZPL codes to ZEBRA printer using PrintDocument class。

具体的OP挑这个功能从答案的线索：

[DllImport("kernel32.dll", SetLastError = true)] 
static extern SafeFileHandle CreateFile(string lpFileName, FileAccess dwDesiredAccess, 
uint dwShareMode, IntPtr lpSecurityAttributes, FileMode dwCreationDisposition, 
uint dwFlagsAndAttributes, IntPtr hTemplateFile); 

private void Print() 
{ 
    // Command to be sent to the printer 
    string command = "^XA^FO10,10,^AO,30,20^FDFDTesting^FS^FO10,30^BY3^BCN,100,Y,N,N^FDTesting^FS^XZ"; 

    // Create a buffer with the command 
    Byte[] buffer = new byte[command.Length]; 
    buffer = System.Text.Encoding.ASCII.GetBytes(command); 
    // Use the CreateFile external func to connect to the LPT1 port 
    SafeFileHandle printer = CreateFile("LPT1:", FileAccess.ReadWrite, 0, IntPtr.Zero, FileMode.Open, 0, IntPtr.Zero); 
    // Aqui verifico se a impressora é válida 
    if (printer.IsInvalid == true) 
    { 
     return; 
    } 

    // Open the filestream to the lpt1 port and send the command 
    FileStream lpt1 = new FileStream(printer, FileAccess.ReadWrite); 
    lpt1.Write(buffer, 0, buffer.Length); 
    // Close the FileStream connection 
    lpt1.Close(); 

} 

Answer 2

我管理的项目，与插座做了多年。 Zebra通常使用6101端口。我会查看代码并发布我可以做的。

public void SendData(string zpl) 
{ 
    NetworkStream ns = null; 
    Socket socket = null; 

    try 
    { 
     if (printerIP == null) 
     { 
      /* IP is a string property for the printer's IP address. */ 
      /* 6101 is the common port of all our Zebra printers. */ 
      printerIP = new IPEndPoint(IPAddress.Parse(IP), 6101); 
     } 

     socket = new Socket(AddressFamily.InterNetwork, 
      SocketType.Stream, 
      ProtocolType.Tcp); 
     socket.Connect(printerIP); 

     ns = new NetworkStream(socket); 

     byte[] toSend = Encoding.ASCII.GetBytes(zpl); 
     ns.Write(toSend, 0, toSend.Length); 
    } 
    finally 
    { 
     if (ns != null) 
      ns.Close(); 

     if (socket != null && socket.Connected) 
      socket.Close(); 
    } 
} 

Answer 3

因为在C＃和ZPL的搜索结果中仍然显示出高位，所以应该提到SharpZebra。这只是EPL2，但我提交了一个update，它增加了ZPL支持以及通过套接字打印，Windows打印服务和直接USB打印。

Answer 4

VB版（使用端口9100 - 使用Zebra ZM400测试）

Sub PrintZPL(ByVal pIP As String, ByVal psZPL As String) 
    Dim lAddress As Net.IPEndPoint 
    Dim lSocket As System.Net.Sockets.Socket = Nothing 
    Dim lNetStream As System.Net.Sockets.NetworkStream = Nothing 
    Dim lBytes As Byte() 

    Try 
     lAddress = New Net.IPEndPoint(Net.IPAddress.Parse(pIP), 9100) 
     lSocket = New Socket(AddressFamily.InterNetwork, SocketType.Stream, _      ProtocolType.Tcp) 
     lSocket.Connect(lAddress) 
     lNetStream = New NetworkStream(lSocket) 

     lBytes = System.Text.Encoding.ASCII.GetBytes(psZPL) 
     lNetStream.Write(lBytes, 0, lBytes.Length) 
    Catch ex As Exception When Not App.Debugging 
     Msgbox ex.message & vbnewline & ex.tostring 
    Finally 
     If Not lNetStream Is Nothing Then 
      lNetStream.Close() 
     End If 
     If Not lSocket Is Nothing Then 
      lSocket.Close() 
     End If 
    End Try 
End Sub 

Answer 5

我用的这两个

Private Sub sendData(ByVal zpl As String) 
    Dim ns As System.Net.Sockets.NetworkStream = Nothing 
    Dim socket As System.Net.Sockets.Socket = Nothing 
    Dim printerIP As Net.IPEndPoint = Nothing 
    Dim toSend As Byte() 

    Try 
     If printerIP Is Nothing Then 
      'set the IP address 
      printerIP = New Net.IPEndPoint(IPAddress.Parse(IP_ADDRESS), 9100) 
     End If 

     'Create a TCP socket 
     socket = New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp) 
     'Connect to the printer based on the IP address 
     socket.Connect(printerIP) 
     'create a new network stream based on the socket connection 
     ns = New NetworkStream(socket) 

     'convert the zpl command to a byte array 
     toSend = System.Text.Encoding.ASCII.GetBytes(zpl) 

     'send the zpl byte array over the networkstream to the connected printer 
     ns.Write(toSend, 0, toSend.Length) 

    Catch ex As Exception 
     MessageBox.Show(ex.Message, "Cable Printer", MessageBoxButtons.OKCancel, MessageBoxIcon.Error) 
    Finally 
     'close the networkstream and then the socket 
     If Not ns Is Nothing Then 
      ns.Close() 
     End If 

     If Not socket Is Nothing Then 
      socket.Close() 
     End If 
    End Try 
End Sub 


Private Function createString() As String 
    Dim command As String 

    command = "^XA" 
    command += "^LH20,25" 

    If rdoSmall.Checked = True Then 
     command += "^FO1,30^A0,N,25,25^FD" 
    ElseIf rdoNormal.Checked = True Then 
     command += "^FO1,30^A0,N,35,35^FD" 
    Else 
     command += "^FO1,30^A0,N,50,50^FD" 
    End If 

    command += txtInput.Text 
    command += "^FS" 
    command += "^XZ" 

    Return command 

End Function 

Answer 6

这样的组合，你将能够发送ZPL到打印机没有不管它是如何连接（LPT，USB，网络共享 ...）

（上How to send raw data to a printer by using Visual C# .NET从微软的文章）创建RawPrinterHelper类：

using System; 
using System.Drawing; 
using System.Drawing.Printing; 
using System.Windows.Forms; 
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; 
    } 
} 

调用打印方法：

private void BtnPrint_Click(object sender, System.EventArgs e) 
{ 
    string s = "^XA^LH30,30\n^FO20,10^ADN,90,50^AD^FDHello World^FS\n^XZ"; 

    PrintDialog pd = new PrintDialog(); 
    pd.PrinterSettings = new PrinterSettings(); 
    if(DialogResult.OK == pd.ShowDialog(this)) 
    { 
     RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, s); 
    } 
} 

---

有2个陷阱我遇到这种情况发生时，你'将带有ZPL代码的txt文件发送到打印机：

1. 文件ha s到结束与新行字符

2. 编码必须设置ANSI阅读txt文件时有特殊字符

   public static bool SendTextFileToPrinter(string szFileName, string printerName) 
   { 
       var sb = new StringBuilder(); 
   
       using (var sr = new StreamReader(szFileName, Encoding.Default)) 
       { 
        while (!sr.EndOfStream) 
        { 
         sb.AppendLine(sr.ReadLine()); 
        } 
       } 
   
       return RawPrinterHelper.SendStringToPrinter(printerName, sb.ToString()); 
   } 
   

Answer 7

有斑马技术支持网站上回答Encoding.Default：

https://km.zebra.com/kb/index?page=content&id=SA301&cat=ZISV_PL_ZPL&actp=LIST

Answer 8

的最简单的解决方案是与将文件复制到共享打印机。
实施例C＃：

System.IO.File.Copy(inputFilePath, printerPath); 

其中：

• inputFilePath - 路径ZPL文件（不需要特殊的扩展）;
• printerPath - 路径共享打印机，例如（！）：\ 127.0.0.1 \ zebraGX

Answer 9

下面是使用TCP IP协议来做到这一点：

// Printer IP Address and communication port 
    string ipAddress = "10.3.14.42"; 
    int port = 9100; 

// ZPL Command(s) 
    string ZPLString = 
    "^XA" + 
    "^FO50,50" + 
    "^A0N50,50" + 
    "^FDHello, World!^FS" + 
    "^XZ"; 

    try 
    { 
    // Open connection 
    System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient(); 
    client.Connect(ipAddress, port); 

    // Write ZPL String to connection 
    System.IO.StreamWriter writer = 
    new System.IO.StreamWriter(client.GetStream()); 
    writer.Write(ZPLString); 
    writer.Flush(); 

    // Close Connection 
    writer.Close(); 
    client.Close(); 
} 
catch (Exception ex) 
{ 
    // Catch Exception 
} 

来源：ZEBRA WEBSITE