获得本地打印机

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace 遍历打印机
{
    class CPrintApi
    {
        #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)]
        public static extern bool EnumPrinters(
                                        PrinterEnumFlags Flags,
                                        string Name,
                                        uint Level,
                                        IntPtr pPrinterEnum,
                                        uint cbBuf,
                                        ref uint pcbNeeded,
                                        ref uint pcReturned
                                                );

        #endregion
        public static List<string> GetPrintName()
        {
            List<string> strPrint = new List<string>();
            PRINTER_INFO_2[] printInfo;
        

              printInfo = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL);

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

            return strPrint;
        }
        /// <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;
        }

    }
}