c#如何列出当前所有可用的打印机列表？

// The initial C# code for the WMI query was generated by WMI Code
//Generator, Version 5.00, http://www.robvanderwoude.com/wmigen.php
using System;
using System.Management;
using System.Collections;
namespace RobvanderWoude
{
 public class ListPrinters
 {
public static int Main( string[] args )
{
 try
 {
string computer = string.Empty;
#region Command line parsing
// Only 1 optional argument allowed: a remote computer name
if ( args.Length > 1 )
{
 throw new Exception( "Invalid command line arguments" );
}
if ( args.Length == 1 )
{
 // We'll display a 'friendly' message if help was requested
 if ( args[0].StartsWith( "/" ) || args[0].StartsWith( "-" ) )
 {
switch ( args[0].ToUpper( ) )
{
 case "/?":
 case "-?":
 case "/H":
 case "-H":
 case "--H":
 case "/HELP":
 case "-HELP":
 case "--HELP":
return WriteError( string.Empty );
 default:
return WriteError( "Invalid command line argument" );
}
 }
 else
 {
computer = "\" + args[0] + "";
 }
}
#endregion
string wmins = computer + "rootCIMV2";
ManagementObjectSearcher searcher = new ManagementObjectSearcher( wmins, "SELECT * FROM Win32_Printer" );
ArrayList printers = new ArrayList( );
foreach ( ManagementObject queryObj in searcher.Get( ) )
{
 printers.Add( queryObj["DeviceID"] );
}
printers.Sort( );
foreach ( string printer in printers )
{
 Console.WriteLine( printer );
}
return 0;
 }
 catch ( Exception e )
 {
return WriteError( e );
 }
}
public static int WriteError( Exception e )
{
 return WriteError( e == null ? null : e.Message );
}
public static int WriteError( string errorMessage )
{
 string fullpath = Environment.GetCommandLineArgs( ).GetValue( 0 ).ToString( );
 string[] program = fullpath.Split( '' );
 string exename = program[program.GetUpperBound( 0 )];
 exename = exename.Substring( 0, exename.IndexOf( '.' ) );
 if ( string.IsNullOrEmpty( errorMessage ) == false )
 {
Console.Error.WriteLine( );
Console.ForegroundColor = ConsoleColor.Red;
Console.Error.Write( "ERROR: " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.WriteLine( errorMessage );
Console.ResetColor( );
 }
 Console.Error.WriteLine( );
 Console.Error.WriteLine( exename + ", Version 1.10" );
 Console.Error.WriteLine( "List all local printers on the specified computer" );
 Console.Error.WriteLine( );
 Console.Error.Write( "Usage: " );
 Console.ForegroundColor = ConsoleColor.White;
 Console.Error.Write( exename.ToUpper( ) );
 Console.Error.WriteLine( " [ computername ]" );
 Console.ResetColor( );
 Console.Error.WriteLine( );
 Console.Error.WriteLine( "Where: 'computername' is the (optional) name of a remote computer" );
 Console.Error.WriteLine( " (default if not specified: local computer)" );
 Console.Error.WriteLine( );
 Console.Error.WriteLine( "Written by Rob van der Woude" );
 return 1;
}
 }
}