Source code for deltrash.cs

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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Runtime.InteropServices;
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using Shell32;
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namespace RobvanderWoude
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{
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	class DelTrash
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	{
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		static string progver = "1.02";
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		static int Main( string[] args )
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		{
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			#region Initialize Variables
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			int rc = 0;
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			long totalsize = 0;
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			int deleteditems = 0;
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			int accessdenieddirs = 0;
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			bool accessdenied = false;
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			bool confirm = false;
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			bool progress = false;
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			bool quiet = false;
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			bool verbose = false;
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			RecycleFlags flags = RecycleFlags.RecycleNoSound;

			string drive = null; // default: All drives

			string windrive = Path.GetPathRoot( Environment.SystemDirectory );

```
 
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			#endregion Initialize Variables
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			#region Parse Command Line
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			if ( args.Length > 3 )
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			{
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				return ShowHelp( );
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			}
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			foreach ( string arg in args )
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			{
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				switch ( arg.ToUpper( ) )
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				{
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					case "/?":
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						return ShowHelp( );
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					case "/C":
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						if ( confirm )
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						{
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							return ShowHelp( "Duplicate command line switch /C" );

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						}
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						confirm = true;
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						break;
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					case "/P":
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						if ( progress )
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						{
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							return ShowHelp( "Duplicate command line switch /P" );

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						}
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						progress = true;
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						break;
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					case "/Q":
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						if ( quiet )
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						{
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							return ShowHelp( "Duplicate command line switch /Q" );

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						}
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						if ( verbose )
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						{
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							return ShowHelp( "Switches /V and /Q are mutually exclusive" );

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						}
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						verbose = true;
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						break;
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					case "/V":
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						if ( verbose )
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						{
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							return ShowHelp( "Duplicate command line switch /V" );

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						}
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						if ( quiet )
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						{
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							return ShowHelp( "Switches /V and /Q are mutually exclusive" );

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						}
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						verbose = true;
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						break;
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					case "/W":
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						if ( drive != null )
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						{
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							if ( drive == windrive )
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							{
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								return ShowHelp( "Either specify a drive letter or use the /W switch, not both" );

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							}
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							else
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							{
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								return ShowHelp( "Duplicate drive specification {0} and {1}", drive, arg.ToUpper( ) );

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							}
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						}
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						drive = windrive;
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						break;
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					default:
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						bool validdrive = false;
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						DriveInfo[] alldrives = DriveInfo.GetDrives( );

						foreach ( DriveInfo drvinf in alldrives )

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						{
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							if ( drvinf.Name == arg.ToUpper( ) + "\\" )

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							{
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								validdrive = true;
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								drive = arg.ToUpper( );
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							}
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						}
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						if ( !validdrive )
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						{
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							return ShowHelp( "Invalid command line argument \"{0}\"", arg );

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						}
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						break;
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				}
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			}
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			if ( !confirm )
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			{
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				flags |= RecycleFlags.RecycleNoConfirmation;

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			}
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			if ( !progress )
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			{
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				flags |= RecycleFlags.RecycleNoProgressUI;

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			}
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			#endregion Parse Command Line
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			#region Verbose Output
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			if ( verbose )
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			{
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				foreach ( DriveInfo diskdrive in DriveInfo.GetDrives( ) )

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				{
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					if ( diskdrive.DriveType == DriveType.Fixed ) // local harddisks only

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					{
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						string recyclebin = Path.Combine( diskdrive.Name, "$RECYCLE.BIN" );

						if ( Directory.Exists( recyclebin ) )

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						{
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							long size = 0;
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							int items = 0;
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							string[] files = new string[0];
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							string[] folders = Directory.GetDirectories( recyclebin );

							foreach ( string folder in folders )

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							{
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								try
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								{
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									// assuming any access denied will occur on the first directory level

									files = Directory.GetFiles( folder, "*.*", SearchOption.AllDirectories );

									foreach ( string file in files )

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									{
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										size += new FileInfo( file ).Length;

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										items++;
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									}
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								}
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								catch ( UnauthorizedAccessException )

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								{
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									accessdenied = true;
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									accessdenieddirs++;
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								}
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							}
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							if ( items == 1 )
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							{
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								Console.WriteLine( "Deleting 1 file ({1}) from drive {2}", items, FormatBytes( size ), diskdrive.Name.Remove( 2 ) );

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								totalsize += size;
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								deleteditems += items;
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							}
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							else if ( items > 1 )
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							{
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								Console.WriteLine( "Deleting {0} files ({1}) from drive {2}", items, FormatBytes( size ), diskdrive.Name.Remove( 2 ) );

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								totalsize += size;
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								deleteditems += items;
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							}
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						}
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					}
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				}
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			}
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			#endregion Verbose Output
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			#region Actual Deletion
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			uint result = SHEmptyRecycleBin( IntPtr.Zero, drive, flags );

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			if ( result == 0 )
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			{
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				if ( !quiet )
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				{
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					Console.WriteLine( "{0} items with a total size of {1} have been permanently deleted.", deleteditems, FormatBytes( totalsize ) );

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					if ( accessdenied )
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					{
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						if ( accessdenieddirs == 1 )
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						{
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							Console.WriteLine( "Not all items could be removed permanently because access was denied to 1 directory" );

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						}
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						else
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						{
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							Console.WriteLine( "Not all items could be removed permanently because access was denied to {0} directories", accessdenieddirs );

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						}
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					}
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				}
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				rc = 0;
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			}
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			else
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			{
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				if ( !quiet )
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				{
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					Console.WriteLine( "Not all items could be removed permanently" );

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				}
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				rc = 1;
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			}
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			#endregion Actual Deletion
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			return rc;
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		}
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		static string FormatBytes( long bytes )

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		{
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			int KB = 1024;
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			int MB = 1024 * KB;
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			int GB = 1024 * MB;
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			if ( bytes < KB )
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			{
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				return bytes.ToString( ) + " B";
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			}
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			else if ( bytes < MB )
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			{
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				return ( bytes / KB ).ToString( ) + " KB";

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			}
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			else if ( bytes < GB )
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			{
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				return ( bytes / MB ).ToString( ) + " MB";

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			}
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			else
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			{
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				return ( bytes / GB ).ToString( ) + " GB";

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			}
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		}
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		static int ShowHelp( params string[] errmsg )

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		{
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			#region Error Message
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			if ( errmsg.Length > 0 )
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			{
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				List<string> errargs = new List<string>( errmsg );

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				errargs.RemoveAt( 0 );
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				Console.Error.WriteLine( );
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				Console.ForegroundColor = ConsoleColor.Red;

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				Console.Error.Write( "ERROR:\t" );
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				Console.ForegroundColor = ConsoleColor.White;

				Console.Error.WriteLine( errmsg[0], errargs.ToArray( ) );

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				Console.ResetColor( );
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			}
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			#endregion Error Message
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			#region Help Text
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			/*
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			DelTrash.exe,  Version 1.01
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			Empty the Recycle Bin
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```

			Usage:   DelTrash.exe  [ drive: | /W ]  [ /C ]  [ /P ]  [ /Q | /V ]

```
 
```

			Where:   drive:  empty recycle bin on this drive only (default: all drives)

			         /W      empty recycle bin on Windows' drive only (default: all drives)

			         /C      prompt for Confirmation

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			         /P      show Progress bar
```

			         /Q      Quiet mode, no screen output

			         /V      Verbose mode, show number of files and total size per disk drive

```
 
```

			Notes:   Switches /Q and /V are mutually exclusive.

			         Return code is 0 if the Recycle Bin was emptied successfully, or 1

			         if there was nothing to delete or in case of (command line) errors.

```
 
```

			Credits: Based on code by Vinoth Kumar

			         www.codeproject.com/Articles/20172/Empty-the-Recycle-Bin-using-C

			         Number of items and size calculation based on

```
 
```
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			Written by Rob van der Woude
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			https://www.robvanderwoude.com
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			*/
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			#endregion Help Text
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			#region Display Help Text
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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "DelTrash.exe,  Version {0}", progver );

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			Console.Error.WriteLine( "Empty the Recycle Bin" );

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			Console.Error.WriteLine( );
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			Console.Error.Write( "Usage:   " );
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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.WriteLine( "DelTrash.exe  [ drive: | /W ]  [ /C ]  [ /P ]  [ /Q | /V ]" );

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			Console.ResetColor( );
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			Console.Error.WriteLine( );
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			Console.Error.Write( "Where:   " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "drive:" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "  empty recycle bin on this drive only (default: all drives)" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /W" );

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			Console.ResetColor( );
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			Console.Error.Write( "      empty recycle bin on " );

			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "W" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "indows' drive only (default: all drives)" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /C" );

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			Console.ResetColor( );
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			Console.Error.Write( "      prompt for " );

			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "C" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "onfirmation" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /P" );

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			Console.ResetColor( );
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			Console.Error.Write( "      show " );

			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "P" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "rogress bar" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /Q      Q" );

```
			Console.ResetColor( );
```

			Console.Error.WriteLine( "uiet mode, no screen output" );

```
 
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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "         /V      V" );

```
			Console.ResetColor( );
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			Console.Error.WriteLine( "erbose mode, show number of files and total size per disk drive" );

```
 
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			Console.Error.WriteLine( );
```
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			Console.Error.Write( "Notes:   Switches " );

			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "/Q" );
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			Console.ResetColor( );
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			Console.Error.Write( " and " );
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			Console.ForegroundColor = ConsoleColor.White;

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			Console.Error.Write( "/V" );
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			Console.ResetColor( );
```

			Console.Error.WriteLine( " are mutually exclusive." );

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			Console.Error.WriteLine( "         Return code is 0 if the Recycle Bin was emptied successfully, or 1" );

```
 
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			Console.Error.WriteLine( "         if there was nothing to delete or in case of (command line) errors." );

```
 
```
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			Console.Error.WriteLine( );
```
```
 
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			Console.Error.WriteLine( "Credits: Based on code by Vinoth Kumar" );

```
 
```

			Console.ForegroundColor = ConsoleColor.DarkGray;

			Console.Error.WriteLine( "         www.codeproject.com/Articles/20172/Empty-the-Recycle-Bin-using-C" );

```
			Console.ResetColor( );
```
```
 
```
```
			Console.Error.WriteLine( );
```
```
 
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			Console.Error.WriteLine( "Written by Rob van der Woude" );

```
 
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			Console.Error.WriteLine( "https://www.robvanderwoude.com" );

```
 
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```
			#endregion Display Help Text
```
```
 
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```
			return 1;
```
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		}
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```
		public enum RecycleFlags : uint
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		{
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			RecycleNoConfirmation = 0x00000001,
```
```
			RecycleNoProgressUI = 0x00000002,
```
```
			RecycleNoSound = 0x00000004
```
```
		}
```
```
 
```
```
 
```

		[DllImport( "Shell32.dll", CharSet = CharSet.Unicode )]

		static extern uint SHEmptyRecycleBin( IntPtr hwnd, string pszRootPath, RecycleFlags dwFlags );

```
	}
```
```
}
```