C#获得本地、网络打印机信息（提供托管与非托管两种方式）

// ***************************************************************
//  Program   version:  1.0   ? date: 10/20/2007
//  -------------------------------------------------------------
//  Author:yangzk
//  Email:yangzk@itecheasy.com
//  -------------------------------------------------------------
//  Copyright (C) 2007 - All Rights Reserved
// ***************************************************************
// 
// ***************************************************************
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace EnumPrint
{
    public class Program
    {

        #region 预定义类型

        [FlagsAttribute]
        public enum PrinterEnumFlags
        {
            PRINTER_ENUM_DEFAULT = 0x00000001,
            PRINTER_ENUM_LOCAL = 0x00000002,
            PRINTER_ENUM_CONNECTIONS = 0x00000004,
            PRINTER_ENUM_FAVORITE = 0x00000004,
            PRINTER_ENUM_NAME = 0x00000008,
            PRINTER_ENUM_REMOTE = 0x00000010,
            PRINTER_ENUM_SHARED = 0x00000020,
            PRINTER_ENUM_NETWORK = 0x00000040,
            PRINTER_ENUM_EXPAND = 0x00004000,
            PRINTER_ENUM_CONTAINER = 0x00008000,
            PRINTER_ENUM_ICONMASK = 0x00ff0000,
            PRINTER_ENUM_ICON1 = 0x00010000,
            PRINTER_ENUM_ICON2 = 0x00020000,
            PRINTER_ENUM_ICON3 = 0x00040000,
            PRINTER_ENUM_ICON4 = 0x00080000,
            PRINTER_ENUM_ICON5 = 0x00100000,
            PRINTER_ENUM_ICON6 = 0x00200000,
            PRINTER_ENUM_ICON7 = 0x00400000,
            PRINTER_ENUM_ICON8 = 0x00800000,
            PRINTER_ENUM_HIDE = 0x01000000
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct PRINTER_INFO_2
        {
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pServerName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pPrinterName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pShareName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pPortName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pDriverName;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pComment;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pLocation;
            public IntPtr pDevMode;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pSepFile;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pPrintProcessor;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pDatatype;
            [MarshalAs(UnmanagedType.LPTStr)]
            public string pParameters;
            public IntPtr pSecurityDescriptor;
            public uint Attributes;
            public uint Priority;
            public uint DefaultPriority;
            public uint StartTime;
            public uint UntilTime;
            public uint Status;
            public uint cJobs;
            public uint AveragePPM;
        }

        #endregion

        #region 引用 WindowsAPI
        //引用API声明
        [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool EnumPrinters(
                                        PrinterEnumFlags Flags,
                                        string Name,
                                        uint Level,
                                        IntPtr pPrinterEnum,
                                        uint cbBuf,
                                        ref uint pcbNeeded,
                                        ref uint pcReturned
                                                );

        #endregion

        static void Main(string[] args)
        {
            PRINTER_INFO_2[] printInfo;

            printInfo = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL);

            if(printInfo != null && printInfo.Length >= 0)
            {
                for(int i= 0 ;i< printInfo.Length ; i++)
                {
                    Console.WriteLine(printInfo[i].pPrinterName);
                }
            }

            Console.Read();
        }

        #region 非托管解决代码
        //使用非托管代码应该设置项目允许unsaft代码

        ///// <summary>
        ///// 遍历打印机
        ///// </summary>
        ///// <param name="Flags"></param>
        ///// <returns></returns>
        //unsafe public static PRINTER_INFO_2[] EnumPrinters(PrinterEnumFlags Flags)
        //{
        //    PRINTER_INFO_2[] Info2;

        //    uint cbNeeded = 0;
        //    uint cReturned = 0;

        //    bool ret = EnumPrinters(Flags, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned);

        //    byte[] bPrinterEnum = new byte[cbNeeded];

        //    fixed (byte* pAddr = bPrinterEnum)
        //    {

        //        ret = EnumPrinters(Flags, null, 2, (IntPtr)pAddr, (uint)bPrinterEnum.Length, ref cbNeeded, ref cReturned);

        //        if (ret)
        //        {
        //            Info2 = new PRINTER_INFO_2[cReturned];

        //            byte* pCurrent = pAddr;
        //            for (int i = 0; i < cReturned; i++)
        //            {
        //                Info2[i].pServerName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pPrinterName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pShareName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pPortName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pDriverName = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pComment = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pLocation = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pDevMode = Marshal.ReadIntPtr((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].pSepFile = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pPrintProcessor = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pDatatype = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pParameters = Marshal.PtrToStringAuto(Marshal.ReadIntPtr((IntPtr)pCurrent));
        //                pCurrent += 4;
        //                Info2[i].pSecurityDescriptor = Marshal.ReadIntPtr((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].Attributes = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].Priority = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].DefaultPriority = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].StartTime = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].UntilTime = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].Status = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].cJobs = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //                Info2[i].AveragePPM = (uint)Marshal.ReadInt32((IntPtr)pCurrent);
        //                pCurrent += 4;
        //            }
        //        }
        //        else
        //        {
        //            Info2 = new PRINTER_INFO_2[0];
        //        }

        //    }
        //    return Info2;
        //}

        #endregion

        #region 托管代码

        /// <summary>
        /// 遍历打印机
        /// </summary>
        /// <param name="Flags"></param>
        /// <returns></returns>
        public static PRINTER_INFO_2[] EnumPrinters(PrinterEnumFlags Flags)
        {
            PRINTER_INFO_2[] Info2 = null;

            uint cbNeeded = 0;
            uint cReturned = 0;

            bool ret = EnumPrinters(Flags, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned);
            IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
            ret = EnumPrinters(Flags, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned);

            if(ret)
            {
                Info2 = new PRINTER_INFO_2[cReturned];
                int offset = pAddr.ToInt32();
                for (int i = 0; i < cReturned; i++)
                {
                    Info2[i] = (PRINTER_INFO_2)Marshal.PtrToStructure(new IntPtr(offset), typeof(PRINTER_INFO_2));
                    offset += Marshal.SizeOf(typeof(PRINTER_INFO_2));
                }

                Marshal.FreeHGlobal(pAddr);
            }

            return Info2;
        }

        #endregion
    }
}

转贴来自：http://www.cnblogs.com/yangzk/archive/2007/10/20/931806.html