narsil/Tanshu.Accounts.Print/RawPrinterHelper.cs

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C#
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2010-03-02 17:56:21 +00:00
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.Text;
namespace Tanshu.Accounts.Print
{
internal class RawPrinterHelper
{
// Cut Code for the printer Alt-29, Alt-86, Alt-49
#region API Declarations
// Structure and API declarions:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
internal 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)]
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internal 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)]
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internal static extern bool ClosePrinter(IntPtr hPrinter);
[DllImport("winspool.drv", EntryPoint = "StartDocPrinterA", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal 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)]
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internal static extern bool EndDocPrinter(IntPtr hPrinter);
[DllImport("winspool.drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool StartPagePrinter(IntPtr hPrinter);
[DllImport("winspool.drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool EndPagePrinter(IntPtr hPrinter);
[DllImport("winspool.drv", EntryPoint = "WritePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool WritePrinter(IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, out Int32 dwWritten);
#endregion
internal static bool PrintString(string printerName, string documentName, string printingText, char[] lineBreakChars)
{
string[] PageText;
IntPtr hPrinter = new IntPtr(0);
// The printer handle.
Int32 dwError;
// Last error -incase there was trouble.
DOCINFOA di = new DOCINFOA();
// Describes your document(name, port, data type).
bool bSuccess = false; // Your success code.
// Set up the DOCINFO structure.
di.pDocName = documentName;
di.pDataType = "RAW";
PageText = printingText.Split(lineBreakChars );
if (OpenPrinter(printerName.Normalize(), out hPrinter, System.IntPtr.Zero))
{
if (StartDocPrinter(hPrinter, 1, di))
{
for (int i = 0; i < PageText.Length; i++)
{
if (StartPagePrinter(hPrinter))
{
//Write your printer - specific bytes to the printer.
bSuccess = SendLine(PageText[i], hPrinter);
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;
}// SendBytesToPrinter()
internal static bool SendLine(string szString, IntPtr hPrinter)
{
bool bSuccess = false;
Int32 dwWritten = 0;
Int32 dwCount = szString.Length; // How many characters are in the string?
IntPtr pBytes = Marshal.StringToCoTaskMemAnsi(szString);
// Assume that the printer is expecting ANSI text, and then convert
// the string to ANSI text.
// Write your bytes.
bSuccess = WritePrinter(hPrinter, pBytes, dwCount, out dwWritten);
return bSuccess;
}
}
}