本文实例讲述了C#返回当前系统所有可用驱动器符号的方法。分享给大家供大家参考。具体如下：
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// The initial C# code for the "plain" 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.Generic;
namespace RobvanderWoude
{
public class ListDrives
{
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 + "root\\CIMV2";
ManagementObjectSearcher searcher = new ManagementObjectSearcher( wmins, "SELECT * FROM Win32_LogicalDisk" );
List<string> drives = new List<string>( );
foreach ( ManagementObject queryObj in searcher.Get( ) )
{
drives.Add( queryObj["DeviceID"].ToString( ) );
}
drives.Sort( );
string drivelist = "";
foreach ( string drive in drives )
{
drivelist += ( drive + " " );
}
Console.WriteLine( drivelist.Trim( ) );
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 drive letters in use 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;
}
}
}
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希望本文所述对大家的C#程序设计有所帮助。