internal static extern bool WritePrinter(
// 0
SafePrinterHandle hPrinter,
[MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 2)] byte[] pBytes,
// 2
uint dwCount,
out uint dwWritten);
/// <summary>
/// Create a print job with a string datatype
/// </summary>
/// <param name="PrinterName"></param>
/// <param name="dataType"></param>
/// <param name="jobName"></param>
/// <param name="outputFileName"></param>
public GdiPrintJob(string PrinterName, string dataType, string jobName, string outputFileName)
{
if (String.IsNullOrEmpty(PrinterName))
{
throw new ArgumentException("Contract assertion not met: !String.IsNullOrEmpty(PrinterName)", nameof(PrinterName));
}
if (String.IsNullOrEmpty(dataType))
{
throw new ArgumentException("Contract assertion not met: !String.IsNullOrEmpty(dataType)", nameof(dataType));
}
SafePrinterHandle hPrinter;
if (!NativeMethods.OpenPrinter(PrinterName, out hPrinter, IntPtr.Zero))
{
throw new Win32Exception();
}
this.PrinterHandle = hPrinter;
NativeMethods.DOC_INFO_1 docInfo = new NativeMethods.DOC_INFO_1()
{
DocName = jobName,
Datatype = dataType,
OutputFile = outputFileName
};
IntPtr pDocInfo = Marshal.AllocHGlobal(Marshal.SizeOf(docInfo));
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Marshal.StructureToPtr(docInfo, pDocInfo, false);
UInt32 docid = NativeMethods.StartDocPrinter(hPrinter, 1, pDocInfo);
if (docid == 0)
{
throw new Win32Exception();
}
this.PrintJobID = docid;
}
finally
{
Marshal.FreeHGlobal(pDocInfo);
}
}
public static extern bool GetJob(SafePrinterHandle hPrinter, int JobId, int Level, IntPtr pJob, int cbBuf, out int pcbNeeded);
internal static extern bool EndPagePrinter(SafePrinterHandle hPrinter);
internal static extern bool StartPagePrinter(SafePrinterHandle hPrinter);
internal static extern uint StartDocPrinter(SafePrinterHandle hPrinter, int level, IntPtr di);
internal static extern bool OpenPrinter(string szPrinter, out SafePrinterHandle hPrinter, IntPtr pd);
