I'm trying to print a pcl file programatically in c#.
I'm using the following Microsoft link for reference. (Note it's in VB)
Unfortunatly, it's not work .. I'm only getting blank pages printed.
Note that if I just copy the pcl file to the printer from prompt - i.e. copy filename printer. The page gets printed corrrectly.
Suggestions?
public class PrintRaw
{
[StructLayout(LayoutKind.Sequential)]
public class DocInfo
{
[MarshalAs(UnmanagedType.LPWStr)] public String docName;
[MarshalAs(UnmanagedType.LPWStr)] public String outputFile;
[MarshalAs(UnmanagedType.LPWStr)] public String dataType;
}
[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)] DocInfo 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);
public void Print(String printerName, String filename)
{
IntPtr lhPrinter;
OpenPrinter(printerName, out lhPrinter, new IntPtr(0));
if (lhPrinter.ToInt32() == 0)
return; //Printer not found!!
var rawPrinter = new DocInfo() {docName = "My Document", dataType = "RAW"};
StartDocPrinter(lhPrinter, 1, rawPrinter);
using (var b = new BinaryReader(File.Open(filename, FileMode.Open)))
{
var length = (int) b.BaseStream.Length;
const int bufferSize = 8192;
var numLoops = length/bufferSize;
var leftOver = length%bufferSize;
for (int i = 0; i < numLoops; i++)
{
var buffer = new byte[bufferSize];
int dwWritten;
b.Read(buffer, 0, bufferSize);
IntPtr unmanagedPointer = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, unmanagedPointer, buffer.Length);
WritePrinter(lhPrinter, unmanagedPointer, bufferSize, out dwWritten);
Marshal.FreeHGlobal(unmanagedPointer);
}
if (leftOver > 0)
{
var buffer = new byte[leftOver];
int dwWritten;
b.Read(buffer, 0, leftOver);
IntPtr unmanagedPointer = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, 0, unmanagedPointer, buffer.Length);
WritePrinter(lhPrinter, unmanagedPointer, leftOver, out dwWritten);
Marshal.FreeHGlobal(unmanagedPointer);
}
}
EndDocPrinter(lhPrinter);
ClosePrinter(lhPrinter);
}
}