95 lines
4.4 KiB
C#
95 lines
4.4 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace Tanshu.Accounts.Print
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{
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internal class PrinterWindows : PlatformPrinter
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{
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private string location;
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// Cut Code for the printer Alt-29, Alt-86, Alt-49
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#region API Declarations
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// Structure and API declarions:
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[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
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internal class DOCINFOA
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{
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[MarshalAs(UnmanagedType.LPStr)]
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public string pDocName;
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[MarshalAs(UnmanagedType.LPStr)]
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public string pOutputFile;
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[MarshalAs(UnmanagedType.LPStr)]
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public string pDataType;
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}
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[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);
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[DllImport("winspool.drv", EntryPoint = "ClosePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool ClosePrinter(IntPtr hPrinter);
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[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);
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[DllImport("winspool.drv", EntryPoint = "EndDocPrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool EndDocPrinter(IntPtr hPrinter);
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[DllImport("winspool.drv", EntryPoint = "StartPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool StartPagePrinter(IntPtr hPrinter);
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[DllImport("winspool.drv", EntryPoint = "EndPagePrinter", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
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internal static extern bool EndPagePrinter(IntPtr hPrinter);
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[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);
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#endregion
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internal PrinterWindows (string location)
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{
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this.location = location.Substring(4).Normalize();
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}
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internal override bool Print(string documentName, string printingText)
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{
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IntPtr hPrinter = new IntPtr(0);
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// The printer handle.
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// Last error -incase there was trouble.
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DOCINFOA di = new DOCINFOA();
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// Describes your document(name, port, data type).
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var bSuccess = false; // Your success code.
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// Set up the DOCINFO structure.
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di.pDocName = documentName;
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di.pDataType = "RAW";
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if (OpenPrinter(location, out hPrinter, IntPtr.Zero))
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{
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if (StartDocPrinter(hPrinter, 1, di))
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{
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if (!StartPagePrinter(hPrinter))
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return false;
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//Write your printer - specific bytes to the printer.
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bSuccess = SendLine(printingText, hPrinter);
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EndPagePrinter(hPrinter);
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EndDocPrinter(hPrinter);
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}
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ClosePrinter(hPrinter);
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}
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// If you did not succeed, GetLastError may give more information about why not.
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if (bSuccess == false)
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{
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Marshal.GetLastWin32Error();
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}
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return bSuccess;
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}// SendBytesToPrinter()
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internal static bool SendLine(string szString, IntPtr hPrinter)
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{
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Int32 dwWritten = 0;
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Int32 dwCount = szString.Length; // How many characters are in the string?
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IntPtr pBytes = Marshal.StringToCoTaskMemAnsi(szString);
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// Assume that the printer is expecting ANSI text, and then convert
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// the string to ANSI text.
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// Write your bytes.
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return WritePrinter(hPrinter, pBytes, dwCount, out dwWritten);
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}
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}
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}
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