stampare un txt sulla stampante predefinita con c #

C’è un modo per inviare un .txt a una stampante usando c #?

qualcosa di simile a

string doc = "c:\temp.txt"; sendToPrinter(doc); 

MSDN

MS ha un nuovo documento per .NET su Come: stampare un file di testo multipagina in Windows Form per .NET 2.0 , 3.0 , 3.5 e 4.0 .

È essenzialmente una versione più recente e più completa del documento nella risposta di luvieere, che è stata scritta per .NET 1.1

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) ; } 

Commentando un vecchio post ma dato che questo appare nei primi elementi di una ricerca di Google per ” 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 scavando.

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 (322091) che fornisce un metodo per farlo, how-to-send-raw-data-to-a-printer-by-using-visual-c-.net

Il metodo implica chiamare parti del WinAPI come DLLimports.

Nel caso in cui il file originale si sposti o scompaia, 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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