/// <summary>
/// Prints raw text directly to a printershare with Win32 API.
/// If any errors occurs it will throw an exception with the native Win32 exception as the inner exception.
/// Check http://support.microsoft.com/kb/322091 for reference.
/// </summary>
/// <param name="printerShare">The printershare to write the text to. Example: \\server\printersharename</param>
/// <param name="documentName">Name of the document to print. This will show up in the printer queue as the name of the document.</param>
/// <param name="printText">The text to write to the printer.</param>
/// <returns>Returns the number of bytes written to the printer.</returns>
public static int Print(string printerShare, string documentName, byte[] data)
{
// Placeholder for printer handle
IntPtr lhPrinter = new System.IntPtr();
int dwWritten = 0;
long retVal;
// Create document structure
DOCINFO di = new DOCINFO();
di.pDocName = documentName;
di.pDataType = "RAW";
// lhPrinter contains the handle for the printer opened
// If lhPrinter is 0 then an error has occured
// The OpenPrinter function retrieves a handle to the specified printer
retVal = WinSpoolAPI.OpenPrinter(printerShare, ref lhPrinter, 0);
if (retVal == 0 || lhPrinter.ToInt32() == 0)
{
ThrowException(string.Format("WinSpoolAPI: Error opening printer '{0}'.", printerShare), new Win32Exception());
}
// The StartDocPrinter function notifies the print spooler that a document is to be spooled for printing.
retVal = WinSpoolAPI.StartDocPrinter(lhPrinter, 1, ref di);
if (retVal == 0)
{
// Create the win32 exception that fetches the error
Win32Exception win32Ex = new Win32Exception();
// Cleanup
WinSpoolAPI.ClosePrinter(lhPrinter);
// Throw exception
ThrowException(string.Format("WinSpoolAPI: Error calling StartDocPrinter (printer '{0}')", printerShare), win32Ex);
}
// The StartPagePrinter function notifies the spooler that a page is about to be printed on the specified printer.
retVal = WinSpoolAPI.StartPagePrinter(lhPrinter);
if (retVal == 0)
{
// Create the win32 exception that fetches the error
Win32Exception win32Ex = new Win32Exception();
// Cleanup
WinSpoolAPI.EndDocPrinter(lhPrinter);
WinSpoolAPI.ClosePrinter(lhPrinter);
// Throw exception
ThrowException(string.Format("WinSpoolAPI: Error calling StartPagePrinter (printer '{0}')", printerShare), win32Ex);
}
IntPtr pBytes = Marshal.AllocCoTaskMem(data.Length);
try
{
Marshal.Copy(data, 0, pBytes, data.Length);
retVal = WinSpoolAPI.WritePrinter(lhPrinter, pBytes, data.Length, ref dwWritten);
}
finally
{
Marshal.FreeCoTaskMem(pBytes);
}
if (retVal == 0)
{
// Create the win32 exception that fetches the error
Win32Exception win32Ex = new Win32Exception();
// Cleanup
WinSpoolAPI.EndPagePrinter(lhPrinter);
WinSpoolAPI.EndDocPrinter(lhPrinter);
WinSpoolAPI.ClosePrinter(lhPrinter);
// Throw exception
ThrowException(string.Format("WinSpoolAPI: Error writing data to the printer with WritePrinter call (printer '{0}')", printerShare), win32Ex);
}
// The EndPagePrinter function notifies the print spooler that the application is at the end of a page in a print job.
retVal = WinSpoolAPI.EndPagePrinter(lhPrinter);
if (retVal == 0)
{
// Create the win32 exception that fetches the error
Win32Exception win32Ex = new Win32Exception();
// Cleanup
WinSpoolAPI.EndDocPrinter(lhPrinter);
WinSpoolAPI.ClosePrinter(lhPrinter);
// Throw exception
ThrowException(string.Format("WinSpoolAPI: Error calling EndPagePrinter (printer '{0}')", printerShare), win32Ex);
}
// The EndDocPrinter function ends a print job for the specified printer.
retVal = WinSpoolAPI.EndDocPrinter(lhPrinter);
if (retVal == 0)
{
// Create the win32 exception that fetches the error
Win32Exception win32Ex = new Win32Exception();
// Cleanup
WinSpoolAPI.ClosePrinter(lhPrinter);
// Throw exception
ThrowException(string.Format("WinSpoolAPI: Error calling EndDocPrinter (printer '{0}')", printerShare), win32Ex);
}
// The ClosePrinter function closes the specified printer object.
retVal = WinSpoolAPI.ClosePrinter(lhPrinter);
if (retVal == 0)
{
ThrowException(string.Format("WinSpoolAPI: Error calling ClosePrinter (printer '{0}')", printerShare), new Win32Exception());
}
return(dwWritten);
}
public static extern long StartDocPrinter(IntPtr hPrinter, int Level, ref DOCINFO pDocInfo);
