Last active
September 5, 2018 13:49
-
-
Save joncmc/b4690a1e0745cdbd9de95641e65069eb to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
//Clase para mandara a imprimir texto plano a la impresora | |
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 = "Ticket de Venta";//Este es el nombre con el que guarda el archivo en caso de no imprimir a la impresora fisica. | |
di.pDataType = "RAW";//de tipo texto plano | |
// 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 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; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment