使用c＃將txt打印到默認打印機

Question

有沒有辦法使用c＃將.txt發送到打印機？

就像是

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

Answer 1

MSDN：Visual Studio 2003退休技術文檔

Answer 2

MS有.NET上一個新的文件如何：打印多頁文本文件在Windows窗體的.NET 2.0 ， 3.0 ， 3.5和4.0 。

在luvieere的答案中，它本質上是一個更新，更完整的文檔版本，它是為.NET 1.1編寫的

Answer 3

評論一篇舊帖子，但由於這在谷歌搜索“ c＃發送文本字符串到打印機 ”的前幾個項目中彈出，我想我會添加我發現的結果...保存其他人的幾個小時挖掘。

有時我們需要將文本直接發送到打印機 - POS收據打印機，Zebra標簽打印機，舊點陣打印機，將PCL命令或其他轉義序列發送到HP打印機或發送原始Postscript文件。 普通的PrintDocument方法不合適。

Microsoft提供了一個知識庫文章（322091），提供了一種方法， how-to-send-raw-data-to-a-printer-by-using-visual-c-.net

該方法涉及將WinAPI的部分調用為DLLimports。

如果原始文件移動或消失，我在這里復制了方法的核心，

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;
}

}

Answer 4

這是我最近使用的。

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) ;
}