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clase rawprinterhelper! RRS feed

  • Pregunta

  • Hola gente! es mi primera vez que escribo por este medio, tengo un problema y es que estoy usando

    la clase de rawprinterhelper! y no me imprime, en ninguna impresora

    trato de usar Microsoft XPS Document Writer y tengo el PDF Creator

    no me sale nada, si alguien me da alguna información o ayuda! se lo agradecería!

        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;
            }
        }

    martes, 29 de octubre de 2019 6:32

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