/// <summary>
/// Constructs a new PrintTicket provider instance for the given device.
/// </summary>
/// <param name="deviceName">name of printer device the provider should be bound to</param>
/// <param name="maxVersion">max schema version supported by client</param>
/// <param name="clientVersion">schema version requested by client</param>
/// <exception cref="PrintQueueException">
/// The FallbackPTProvider instance failed to bind to the specified printer.
/// </exception>
public FallbackPTProvider(string deviceName, int maxVersion, int clientVersion)
{
Toolbox.EmitEvent(EventTrace.Event.WClientDRXPTProviderStart);
// We are not doing late binding to the device here because we should
// indicate right away if there was an error in binding the provider
// to the device. Doing late binding would mean that any instance
// method could throw a no such printer exception.
if (false == UnsafeNativeMethods.OpenPrinterW(deviceName, out this._deviceHandle, new HandleRef(this, IntPtr.Zero)))
{
throw new PrintQueueException(Marshal.GetLastWin32Error(), "PrintConfig.Provider.BindFail", deviceName);
}
try
{
PRINTER_INFO_2 info = GetPrinterInfo2W();
this._deviceName = info.pPrinterName;
this._driverName = info.pDriverName;
this._portName = info.pPortName;
if (info.pDevMode != null)
{
this._driverVersion = info.pDevMode.DriverVersion;
}
}
catch (Win32Exception win32Exception)
{
throw new PrintQueueException(win32Exception.ErrorCode, "PrintConfig.Provider.BindFail", deviceName, win32Exception);
}
Toolbox.EmitEvent(EventTrace.Event.WClientDRXPTProviderEnd);
}
///<summary>
/// Obtain a DEVMODE from a printer
///</summary>
///<param name="pHandle">Printer handle</param>
///<param name="baseType">Type of DEVMODE (printer default or user default)</param>
///<param name="devModeBytes">DEVMODE bytes</param>
///<returns>False if the call fails</returns>
private DevMode GetDEVMODE(BaseDevModeType baseType)
{
DevMode result;
switch (baseType)
{
case BaseDevModeType.PrinterDefault:
{
PRINTER_INFO_2 info = GetPrinterInfo2W();
result = info.pDevMode;
break;
}
case BaseDevModeType.UserDefault:
{
PRINTER_INFO_8_AND_9 info = GetPrinterInfo8Or9W(true);
if (info.pDevMode != null)
{
result = info.pDevMode;
}
else
{
// No user default devmode, try the printer default, which is
// effectively the user default if their isn't a per user default
// overriding it.
result = GetDEVMODE(BaseDevModeType.PrinterDefault);
}
break;
}
default:
{
throw new ArgumentOutOfRangeException("baseType");
}
}
if (result == null)
{
throw new PrintSystemException();
}
return(result);
}
/// <summary>
/// A callback that copies PRINTER_INFO_2 fields from an unmanaged buffer
/// </summary>
public void Callback(HGlobalBuffer pPrinterBuffer)
{
// PRINTER_INFO_2 layout from http://msdn.microsoft.com/en-us/library/dd162845(VS.85).aspx
//
//typedef struct _PRINTER_INFO_2 {
// LPTSTR pServerName;
// LPTSTR pPrinterName;
// LPTSTR pShareName;
// LPTSTR pPortName;
// LPTSTR pDriverName;
// LPTSTR pComment;
// LPTSTR pLocation;
// LPDEVMODE pDevMode;
// LPTSTR pSepFile;
// LPTSTR pPrintProcessor;
// LPTSTR pDatatype;
// LPTSTR pParameters;
// PSECURITY_DESCRIPTOR pSecurityDescriptor;
// DWORD Attributes;
// DWORD Priority;
// DWORD DefaultPriority;
// DWORD StartTime;
// DWORD UntilTime;
// DWORD Status;
// DWORD cJobs;
// DWORD AveragePPM;
// } PRINTER_INFO_2, *PPRINTER_INFO_2;
PRINTER_INFO_2 = new PRINTER_INFO_2();
bool shouldRelease = false;
pPrinterBuffer.Handle.DangerousAddRef(ref shouldRelease);
try
{
IntPtr ptr = pPrinterBuffer.Handle.DangerousGetHandle();
// LPTSTR pPrinterName;
IntPtr pPrinterName = Marshal.ReadIntPtr(ptr, 1 * Marshal.SizeOf(typeof(IntPtr)));
if (pPrinterName != IntPtr.Zero)
{
PRINTER_INFO_2.pPrinterName = Marshal.PtrToStringUni(pPrinterName);
}
// LPTSTR pPortName;
IntPtr pPortName = Marshal.ReadIntPtr(ptr, 3 * Marshal.SizeOf(typeof(IntPtr)));
if (pPortName != IntPtr.Zero)
{
PRINTER_INFO_2.pPortName = Marshal.PtrToStringUni(pPortName);
}
// LPTSTR pDriverName;
IntPtr pDriverName = Marshal.ReadIntPtr(ptr, 4 * Marshal.SizeOf(typeof(IntPtr)));
if (pDriverName != IntPtr.Zero)
{
PRINTER_INFO_2.pDriverName = Marshal.PtrToStringUni(pDriverName);
}
// LPDEVMODE pDevMode;
IntPtr pDevMode = Marshal.ReadIntPtr(ptr, 7 * Marshal.SizeOf(typeof(IntPtr)));
if (pDevMode != IntPtr.Zero)
{
PRINTER_INFO_2.pDevMode = DevMode.FromIntPtr(pDevMode);
}
}
finally
{
if (shouldRelease)
{
pPrinterBuffer.Handle.DangerousRelease();
}
}
}
