public static PRINTER_INFO_2[] enumPrinters(PrinterEnumFlags Flags) { uint cbNeeded = 0; uint cReturned = 0; if (EnumPrinters(Flags, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned)) { return null; } int lastWin32Error = Marshal.GetLastWin32Error(); if (lastWin32Error == ERROR_INSUFFICIENT_BUFFER) { IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded); if (EnumPrinters(Flags, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned)) { PRINTER_INFO_2[] printerInfo2 = new PRINTER_INFO_2[cReturned]; int offset = pAddr.ToInt32(); Type type = typeof(PRINTER_INFO_2); int increment = Marshal.SizeOf(type); for (int i = 0; i < cReturned; i++) { printerInfo2[i] = (PRINTER_INFO_2)Marshal.PtrToStructure(new IntPtr(offset), type); offset += increment; } Marshal.FreeHGlobal(pAddr); return printerInfo2; } lastWin32Error = Marshal.GetLastWin32Error(); } throw new Exception(); }
public static PRINTER_INFO_1[] MyEnumPrinters(PrinterEnumFlags Flags) { uint cbNeeded = 0; uint cReturned = 0; IntPtr pPrInfo4 = IntPtr.Zero; uint size = 0; if (EnumPrinters(Flags, null, 1, IntPtr.Zero, size, ref cbNeeded, ref cReturned)) { return new PRINTER_INFO_1[] { }; } if (cbNeeded != 0) { pPrInfo4 = Marshal.AllocHGlobal((int)cbNeeded + 128); size = cbNeeded + 128; EnumPrinters(Flags, null, 1, pPrInfo4, size, ref cbNeeded, ref cReturned); if (cReturned != 0) { PRINTER_INFO_1[] printerInfo1 = new PRINTER_INFO_1[cReturned]; int offset = pPrInfo4.ToInt32(); Type type = typeof(PRINTER_INFO_1); int increment = Marshal.SizeOf(type); for (int i = 0; i < cReturned; i++) { printerInfo1[i] = (PRINTER_INFO_1)Marshal.PtrToStructure(new IntPtr(offset), type); offset += increment; } Marshal.FreeHGlobal(pPrInfo4); return printerInfo1; } } return new PRINTER_INFO_1[] { }; }
private static extern bool EnumPrinters(PrinterEnumFlags Flags, string Name, uint Level, IntPtr pPrinterEnum, uint cbBuf, ref uint pcbNeeded, ref uint pcReturned);
internal static PRINTER_INFO_2[] EnumPrintersByFlag(PrinterEnumFlags Flags) { uint cbNeeded = 0; uint cReturned = 0; bool ret = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned); IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded); ret = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned); if (ret) { PRINTER_INFO_2[] Info2 = new PRINTER_INFO_2[cReturned]; int offset = pAddr.ToInt32(); for (int i = 0; i < cReturned; i++) { Info2[i].pServerName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPrinterName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pShareName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPortName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDriverName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pComment = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pLocation = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDevMode = Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].pSepFile = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPrintProcessor = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDatatype = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pParameters = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pSecurityDescriptor = Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].Attributes = (uint)Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].Priority = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].DefaultPriority = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].StartTime = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].UntilTime = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].Status = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].cJobs = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].AveragePPM = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; } Marshal.FreeHGlobal(pAddr); return Info2; } else { return new PRINTER_INFO_2[0]; } }
internal static PRINTER_INFO_2[] EnumPrintersByFlag(PrinterEnumFlags Flags) { uint cbNeeded = 0; uint cReturned = 0; bool ret = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned); IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded); ret = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned); if (ret) { PRINTER_INFO_2[] Info2 = new PRINTER_INFO_2[cReturned]; int offset = pAddr.ToInt32(); for (int i = 0; i < cReturned; i++) { Info2[i].pServerName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPrinterName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pShareName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPortName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDriverName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pComment = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pLocation = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDevMode = Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].pSepFile = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pPrintProcessor = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pDatatype = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pParameters = Marshal.PtrToStringAuto(Marshal.ReadIntPtr(new IntPtr(offset))); offset += 4; Info2[i].pSecurityDescriptor = Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].Attributes = (uint)Marshal.ReadIntPtr(new IntPtr(offset)); offset += 4; Info2[i].Priority = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].DefaultPriority = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].StartTime = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].UntilTime = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].Status = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].cJobs = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; Info2[i].AveragePPM = (uint)Marshal.ReadInt32(new IntPtr(offset)); offset += 4; } Marshal.FreeHGlobal(pAddr); return(Info2); } else { return(new PRINTER_INFO_2[0]); } }