2009-09-24 51 views

risposta

5

Questo è quello che ho usato di recente.

public void Print(FileInfo file) 
{ 
    ProcessStartInfo psi = new ProcessStartInfo(); 
    psi.FileName = "print"; 
    psi.Arguments = string.Format("/D:\"{0}\" \"{1}\"", Printer, file.FullName); 
    psi.CreateNoWindow = true; 
    psi.UseShellExecute = false; 

    Process p = new Process(); 
    p.StartInfo = psi; 
    p.Start(); 

    while (!p.HasExited) ; 
} 
+0

fa questo di stampa alla stampante predefinita –

+0

* stampante * è una proprietà stringa della classe. Credo che se si rimuove l'argomento "/ D:", verrà inviato alla stampante predefinita. –

+0

Forse perché stavo stampando su una stampante virtuale. Questo comando mi dice che non è possibile inizializzare il dispositivo. –

2

Commentando un vecchio posta , ma dal momento che questo si apre nei primi elementi di un Google cercare "C# invia stringa di testo alla stampante", ho pensato di aggiungere i risultati di ciò che ho trovato ... salvare qualcun altro le poche ore di ricerca.

A volte è necessario inviare il testo direttamente a una stampante: stampanti per ricevute POS, stampanti per etichette Zebra, vecchie stampanti ad aghi, invio di comandi PCL o altre sequenze di escape a una stampante HP o invio di file Postscript non elaborati. I normali metodi PrintDocument non sono appropriati.

Microsoft ha un articolo della knowledge base (322.091), che fornisce un metodo di fare questo, how-to-send-raw-data-to-a-printer-by-using-visual-c-.net

Il metodo prevede di chiamare le parti del WinAPI come DLLimports.

Nel caso in cui le mosse del file originale o scompare, ho copiato il cuore del metodo qui,

using System; 
using System.Drawing; 
using System.Drawing.Printing; 
using System.Windows.Forms; 
using System.IO; 
using System.Runtime.InteropServices;  



private void button1_Click(object sender, System.EventArgs e) 
     { 
      // Allow the user to select a file. 
      OpenFileDialog ofd = new OpenFileDialog(); 
      if(DialogResult.OK == ofd.ShowDialog(this)) 
      { 
       // Allow the user to select a printer. 
       PrintDialog pd = new PrintDialog(); 
       pd.PrinterSettings = new PrinterSettings(); 
       if(DialogResult.OK == pd.ShowDialog(this)) 
       { 
        // Print the file to the printer. 
        RawPrinterHelper.SendFileToPrinter(pd.PrinterSettings.PrinterName, ofd.FileName); 
       } 
      } 

    } 

private void button2_Click(object sender, System.EventArgs e) 
{ 
    string s = "Hello"; // device-dependent string, need a FormFeed? 

    // Allow the user to select a printer. 
    PrintDialog pd = new PrintDialog(); 
    pd.PrinterSettings = new PrinterSettings(); 
    if(DialogResult.OK == pd.ShowDialog(this)) 
    { 
     // Send a printer-specific to the printer. 
     RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, s); 
    } 
} 

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; 
} 

}

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