C#程序动态设定打印选项 [Programmatically selecting complex printer options in C#]

class Program2
    {
        #region P/Invoke
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalFree(IntPtr handle);
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalLock(IntPtr handle);
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalUnlock(IntPtr handle);
 
        #endregion
 
        #region Constants
 
        private const string DUMP_PATH = "DevModeDump.bin";
 
        #endregion
 
        static void Main(string[] args)
        {
            IntPtr hDevMode;                        // handle to the DEVMODE
            IntPtr pDevMode;                        // pointer to the DEVMODE
            DEVMODE devMode;                        // the actual DEVMODE structure
            PrinterSettings printerSettings;        // our flyer's printer settings
            Fall2008LargeFlyerPrintDocument flyer;  // our custom subclass of PrintDocument
 
            flyer = new Fall2008LargeFlyerPrintDocument();
 
            flyer.PrintController = new StandardPrintController();
            printerSettings = flyer.PrinterSettings;
            printerSettings.PrinterName = "Fiery X3E";
 
            // Get a handle to a DEVMODE for the default printer settings
            hDevMode = printerSettings.GetHdevmode(printerSettings.DefaultPageSettings);
 
            // Obtain a lock on the handle and get an actual pointer so Windows won't
            // move it around while we're futzing with it
            pDevMode = GlobalLock(hDevMode);
 
            // Marshal the memory at that pointer into our P/Invoke version of DEVMODE
            devMode = (DEVMODE)Marshal.PtrToStructure(pDevMode, typeof(DEVMODE));
 
            // Read the bytes starting at that pointers position in memory into our
            // file stream
            using (FileStream fs = new FileStream(DUMP_PATH, FileMode.Create))
            {
                for (int i = 0; i < devMode.dmSize + devMode.dmDriverExtra; ++i)
                {
                    fs.WriteByte(Marshal.ReadByte(pDevMode, i));
                }
            }
 
            // Unlock the handle, we're done futzing around with memory
            GlobalUnlock(hDevMode);
 
            // And to boot, we don't need that DEVMODE anymore, either
            GlobalFree(hDevMode);
        }
    }

class Program3
    {
        #region P/Invoke
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalFree(IntPtr handle);
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalLock(IntPtr handle);
 
        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GlobalUnlock(IntPtr handle);
 
        #endregion
 
        #region Constants
 
        private const string DUMP_PATH = "DevModeDump.bin";
 
        #endregion
 
        static void Main(string[] args)
        {
            IntPtr hDevMode;                        // a handle to our current DEVMODE
            IntPtr pDevMode;                        // a pointer to our current DEVMODE
            PrinterSettings printerSettings;        // our flyer's printer settings
            Fall2008LargeFlyerPrintDocument flyer;  // our custom subclass of PrintDocument
            byte[] savedDevMode;                    // will hold the DEVMODE we saved earlier
            Stream savedDevStream;                  // used to read the DEVMODE we saved earlier
 
            flyer = new Fall2008LargeFlyerPrintDocument();
 
            renderedFlyer.PrintController = new StandardPrintController();
            printerSettings = renderedFlyer.PrinterSettings;
            printerSettings.PrinterName = "Fiery X3E";
 
            // Obtain the current DEVMODE position in memory
            hDevMode = printerSettings.GetHdevmode(printerSettings.DefaultPageSettings);
 
            // Obtain a lock on the handle and get an actual pointer so Windows won't move
            // it around while we're futzing with it
            pDevMode = GlobalLock(hDevMode);
 
            // Load the saved DEVMODE that we dumped earlier
            savedDevStream = new FileStream(DUMP_PATH, FileMode.Open, FileAccess.Read);
            savedDevMode = new byte[savedDevStream.Length];
            savedDevStream.Read(savedDevMode, 0, savedDevMode.Length);
            savedDevStream.Close();
            savedDevStream.Dispose();
 
            // Overwrite our current DEVMODE in memory with the one we saved.
            // They should be the same size since we haven't like upgraded the OS
            // or anything.
            for (int i = 0; i < savedDevMode.Length; ++i)
            {
                Marshal.WriteByte(pDevMode, i, savedDevMode[i]);
            }
 
            // We're done futzing
            GlobalUnlock(hDevMode);
 
            // Tell our printer settings to use the one we just overwrote
            printerSettings.SetHdevmode(hDevMode);
 
            // It's copied to our printer settings, so we can free the OS-level one
            GlobalFree(hDevMode);
 
            // Print and we're done!
            renderedFlyer.Print();
            renderedFlyer.Dispose();
        }
    }