C# 使用c将txt打印到默认打印机#
有没有办法用c#向打印机发送.txt文件 差不多C# 使用c将txt打印到默认打印机#,c#,printing,C#,Printing,有没有办法用c#向打印机发送.txt文件 差不多 string doc = "c:\temp.txt"; sendToPrinter(doc); 这是我最近用的 public void Print(FileInfo file) { ProcessStartInfo psi = new ProcessStartInfo(); psi.FileName = "print"; psi.Arguments = string.Format("/D:\"{0}\" \"{1}\""
string doc = "c:\temp.txt";
sendToPrinter(doc);
这是我最近用的
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) ;
}
MS在.NET、和上有一个较新的.NET文档
它本质上是卢维耶尔答案中文档的更新、更完整版本,是为.NET 1.1编写的,它是对一篇旧的帖子的评论,但由于这会在谷歌搜索“c#send text string to printer”的前几项中弹出,我想我会添加我发现的结果。。。节省别人几个小时的挖掘时间 有时我们需要将文本直接发送到打印机——POS收据打印机、Zebra标签打印机、旧的点阵打印机、将PCL命令或其他转义序列发送到HP打印机或发送原始Postscript文件。正常的PrintDocument方法不适用 Microsoft有一篇知识库文章(322091)提供了执行此操作的方法, 该方法涉及将WinAPI的部分调用为DLLimports 如果原始文件移动或消失,我已经在这里复制了方法的核心
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;
}
}是否打印到默认打印机打印机打印机是类的字符串属性。我相信如果删除“/D:”参数,它将发送到默认打印机。可能是因为我正在打印到虚拟打印机。这个命令告诉我无法初始化设备。我相信这不是答案。