Source code for upcase.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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namespace RobvanderWoude
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{
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	class UpCase
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	{
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		public static string progver = "2.02";

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		static int Main( string[] args )
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		{
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			bool verbose = false;
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			char[] locaseletters = "abcdefghijklmnopqrstuvwxyz".ToCharArray( );

			List<string> files = new List<string>( );

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			#region Command Line Parsing
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			if ( Console.IsInputRedirected )
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			{
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				// No command line arguments in case of redirected input

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				if ( args.Length > 0 )
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				{
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					return ShowHelp( );
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				}
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			}
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			else
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			{
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				if ( args.Length == 0 || ( args.Length == 1 && args[0].ToUpper( ).Substring( 0, 2 ) == "/V" ) )

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				{
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					args = new string[] { "*.*" };
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				}
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				foreach ( string arg in args )
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				{
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					if ( arg[0] == '/' )
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					{
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						if ( arg == "/?" )
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						{
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							return ShowHelp( );
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						}
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						if ( arg.Length > 1 && arg.Substring( 0, 2 ).ToUpper( ) == "/V" )

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						{
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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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							verbose = true;
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						}
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						else
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						{
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							return ShowHelp( "Invalid command line switch \"{0}\"", arg );

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						}
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					}
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					else
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					{
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						string parentfolder = Directory.GetParent( arg ).FullName;

						if ( !Directory.Exists( parentfolder ) )

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						{
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							return ShowHelp( "Invalid parent folder \"{0}\"", parentfolder );

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						}
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						string filespec = Path.GetFileName( arg );

						foreach ( string file in Directory.GetFiles( parentfolder, filespec ) )

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						{
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							if ( Path.GetFileName( file ).IndexOfAny( locaseletters ) > -1 )

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							{
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								if ( !files.Contains( file ) )
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								{
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									files.Add( file );
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								}
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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 Command Line Parsing
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			if ( Console.IsInputRedirected )
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			{
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				#region Convert redirected input to upper case

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				Console.OpenStandardInput( );
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				string input = Console.In.ReadToEnd( );

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				Console.OpenStandardOutput( );
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				string output = input.ToUpper( );
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				Console.Out.Write( output );
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				return 0;
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				#endregion Convert redirected input to upper case

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			}
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			else
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			{
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				#region Rename files to upper case
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				foreach ( string file in files )
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				{
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					if ( File.Exists( file ) )
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					{
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						string parentfolder = Directory.GetParent( file ).FullName;

						string filename = Path.GetFileName( file );

						if ( filename.IndexOfAny( locaseletters ) > -1 )

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						{
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							string newfilename = Path.Combine( parentfolder, filename.ToUpperInvariant( ) );

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							try
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							{
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								if ( verbose )
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								{
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									Console.WriteLine( "\"{0}\"  =>  \"{1}\"", file, newfilename );

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								}
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								File.Move( file, newfilename );
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							}
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							catch ( Exception e )
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							{
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								Console.Error.WriteLine( "Error renaming \"{0}\": {1}", filename, e.Message );

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							}
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						}
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					}
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				}
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				if ( verbose )
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				{
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					Console.WriteLine( "{0} matching file{1} renamed", ( files.Count == 0 ? "No" : files.Count.ToString( ) ), ( files.Count == 1 ? String.Empty : "s" ) );

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				}
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				return files.Count;
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				#endregion Rename files to upper case

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			}
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		}
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		#region Error handling
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		public static int ShowHelp( params string[] errmsg )

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		{
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			#region Help text
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```
 
```
```
			/*
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```
			UpCase.exe,  Version 2.02
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			Either rename specified files or render redirected input to all upper case

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```

			Usage:    UpCase.exe  [ filespec  [ filespec  [ ... ] ] ]  [ /V ]

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```
```
			or:       somecommand  |  UpCase.exe
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```

			Where:    filespec     file(s) to be renamed (wildcards allowed, default: *.*)

					  somecommand  command whose output will be rendered to upper case

					  /V           Verbose mode: displays file renaming and files count

```
 
```

			Notes:    Use doublequotes if filespec contains non-alphnumeric characters.

			          If no folder is specified in filespec, current directory is assumed.

					  Return code (\"ErrorLevel\") equals the number of renamed files,

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					  or -1 in case of errors.
```

			          This program requires .NET Framework 4.5; use an older version of

			          of this program if you don't have .NET Framework 4.5 installed.

```
 
```
```
			Written by Rob van der Woude
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			http://www.robvanderwoude.com
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```
			*/
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```
 
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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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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "IpCase.exe,  Version {0}", progver );

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			Console.Error.WriteLine( "Either rename specified files or render redirected input to all upper case" );

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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( "UpCase.exe  [ filespec  [ filespec  [ ... ] ] ]  [ /V ]" );

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

			Console.Error.WriteLine( "somecommand  |  UpCase.exe" );

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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( "filespec" );
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			Console.ResetColor( );
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			Console.Error.WriteLine( "     file(s) to be renamed (wildcards allowed, default: *.*)" );

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			Console.ForegroundColor = ConsoleColor.White;

			Console.Error.Write( "          somecommand" );

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			Console.ResetColor( );
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			Console.Error.WriteLine( "  command whose output will be rendered to upper case" );

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			Console.ForegroundColor = ConsoleColor.White;

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

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			Console.ResetColor( );
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			Console.Error.WriteLine( "erbose mode: displays file renaming and files count" );

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			Console.Error.WriteLine( );
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			Console.Error.WriteLine( "Notes:    Use doublequotes if filespec contains non-alphnumeric characters." );

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			Console.Error.WriteLine( "          If no folder is specified in filespec, current directory is assumed." );

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			Console.Error.WriteLine( "          Return code (\"ErrorLevel\") equals the number of renamed files," );

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			Console.Error.WriteLine( "          or -1 in case of errors." );

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			Console.Error.WriteLine( "          This program requires .NET Framework 4.5; use an older version of" );

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			Console.Error.WriteLine( "          of this program if you don't have .NET Framework 4.5 installed." );

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

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

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			#endregion Help text
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			return -1;
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		}
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		#endregion Error handling
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	}
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}
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```