下面的程式碼內容是關於C#獲得本機可用驅動器編號列表的程式碼，希望能對碼農們有一些幫助。

using System;
using System.Collections.Generic;
using System.IO;

namespace RobvanderWoude
{
class Drives
{
static int Main( string[] args )
{
bool showused = true;
bool showavailable = true;
bool showtype = false;
bool showNotready = true;

#region Command line parsing

if ( args.Length > 1 )
{
return WriteError( "Too many command line arguments" );
}
if ( args.Length == 1 )
{
if ( args[0].StartsWith( "/" ) || args[0].StartsWith( "-" ) )
{
switch ( args[0].ToUpper( ) )
{
case "/A":
case "-A":
showused = false;
break;
case "/T":
case "-T":
showtype = true;
showavailable = false;
break;
case "/R":
case "-R":
showtype = true;
showavailable = false;
showNotready = false;
break;
case "/U":
case "-U":
showavailable = false;
break;
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
{
return WriteError( string.Empty );
}
}

#endregion

if ( showavailable )
{
List<string> letters = new List<string>( );

for ( int i = Convert.ToInt16( 'A' ); i < Convert.ToInt16( 'Z' ); i++ )
{
letters.Add( new string( new char[] { (char) i } ) );
}

foreach ( DriveInfo drive in DriveInfo.GetDrives( ) )
{
letters.Remove( drive.Name.Substring( 0, 1 ).ToUpper( ) );
}

if ( showused )
{
Console.Write( "Available : " );
}
foreach ( string letter in letters )
{
Console.Write( "{0}: ", letter );
}
Console.WriteLine( );
}

if ( showused )
{
if ( showavailable )
{
Console.Write( "Used : " );
}
foreach ( DriveInfo drive in DriveInfo.GetDrives( ) )
{
if ( showtype )
{
bool isready = drive.IsReady;
if ( showNotready )
{
Console.WriteLine( "{0}t{1,-12}t{2}", drive.Name.Substring( 0, 2 ).ToUpper( ), drive.DriveType, ( isready ? drive.DriveFormat : "-- not ready --" ) );
}
else
{
if ( isready )
{
Console.WriteLine( "{0}t{1,-12}t{2}", drive.Name.Substring( 0, 2 ).ToUpper( ), drive.DriveType, drive.DriveFormat );
}
}
}
else
{
Console.Write( "{0} ", drive.Name.Substring( 0, 2 ).ToUpper( ) );
}
}
Console.WriteLine( );
}

return 0;
}

public static int WriteError( Exception e )
{
return WriteError( e == null ? null : e.Message );
}

public static int WriteError( string errorMessage )
{
Drives, Version 2.00
List available and/or used drive letters

Usage: DRIVES [ /A | /R | /T | /U ]

Where: /A lists available drive letters only (default: all)
/R skip drives that are not ready (implies /T)
/T display drive type and filesystem (implies /U)
/U lists used drive letters only (default: all)

Written by Rob van der Woude

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 2.00" );
Console.Error.WriteLine( "List available and/or used drive letters" );
Console.Error.WriteLine( );
Console.Error.Write( "Usage: " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( exename.ToUpper( ) );
Console.ResetColor( );
Console.Error.Write( " [ " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/A" );
Console.ResetColor( );
Console.Error.Write( " | " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/R" );
Console.ResetColor( );
Console.Error.Write( " | " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/T" );
Console.ResetColor( );
Console.Error.Write( " | " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/U" );
Console.ResetColor( );
Console.Error.WriteLine( " ]" );
Console.Error.WriteLine( );
Console.Error.Write( "Where: " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/A" );
Console.ResetColor( );
Console.Error.Write( " lists " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "a" );
Console.ResetColor( );
Console.Error.WriteLine( "vailable drive letters only (default: all)" );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( " /R" );
Console.ResetColor( );
Console.Error.Write( " skip drives that are not " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "r" );
Console.ResetColor( );
Console.Error.Write( "eady (implies " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/T" );
Console.ResetColor( );
Console.Error.WriteLine( ")" );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( " /T" );
Console.ResetColor( );
Console.Error.Write( " display drive " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "t" );
Console.ResetColor( );
Console.Error.Write( "ype and filesystem (implies " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/U" );
Console.ResetColor( );
Console.Error.WriteLine( ")" );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( " /U" );
Console.ResetColor( );
Console.Error.Write( " lists " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "u" );
Console.ResetColor( );
Console.Error.WriteLine( "sed drive letters only (default: all)" );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Written by Rob van der Woude" );
return 1;
}
}
}