C#将制定目录文件名转换成大写的方法

本文实例讲述了C#将制定目录文件名转换成大写的方法。分享给大家供大家参考。具体如下：

using System;
using System.IO;
using System.Linq;
namespace RobvanderWoude
{
class UpCase
{
static int Main( string[] args )
{
string dir = string.Empty;
string filespec = string.Empty;
char[] trailingbackslash = "\\".ToCharArray( 0, 1 );
char[] locaseletters = "abcdefghijklmnopqrstuvwxyz".ToCharArray( 0, 26 );
bool verbose = false;
#region Command Line Parsing
switch ( args.Length )
{
case 0:
return WriteError( string.Empty );
case 1:
filespec = args[0].Trim( '"' );
break;
case 2:
filespec = args[0].Trim( '"' );
if ( args[1].Substring( 0, 2 ).ToUpper( ) == "/V" )
{
verbose = true;
}
else
{
return WriteError( "Invalid command line switch: " + args[1] );
}
break;
default:
return WriteError( string.Empty );
}
if ( string.IsNullOrWhiteSpace( filespec ) || filespec == "/?" )
{
return WriteError( string.Empty );
}
if ( filespec.IndexOfAny( "/?".ToCharArray( 0, 2 ) ) != -1 )
{
return WriteError( "Invalid file specification: \"" + filespec + "\"" );
}
#endregion Command Line Parsing
try
{
// Check if the directory exists
try
{
dir = Path.GetDirectoryName( filespec );
if ( string.IsNullOrWhiteSpace( dir ) )
{
dir = Path.GetFullPath( "." );
}
if ( !Directory.Exists( dir ) )
{
return WriteError( "Directory not found: \"" + dir + "\"" );
}
dir = dir.TrimEnd( trailingbackslash ) + "\\";
}
catch ( ArgumentException )
{
return WriteError( "Parent directory not found" );
}
// Extract the FILE specification (removing the path)
string filenames = filespec.Substring( filespec.LastIndexOf( "\\" ) + 1 );
// Enumerate the files
string[] files = Directory.EnumerateFiles( dir, filenames ).ToArray<string>( );
int count = 0;
foreach ( string file in files )
{
if ( File.Exists( file ) )
{
string filename = Path.GetFileName( file );
if ( filename.IndexOfAny( locaseletters ) > -1 )
{
count++;
string newfilename = dir + filename.ToUpperInvariant( );
File.Move( file, newfilename );
}
}
}
if ( verbose )
{
Console.WriteLine( "{0} matching file{1} renamed", ( count == 0 ? "No" : count.ToString( ) ), ( count == 1 ? string.Empty : "s" ) );
}
return count;
}
catch ( Exception e )
{
return WriteError( e.Message );
}
}
public static int WriteError( Exception e )
{
return WriteError( e == null ? null : e.Message );
}
public static int WriteError( string errorMessage )
{
/*
UpCase.exe, Version 1.02
Rename specified files to all upper case
Usage:  UpCase.exe filespec [ /Verbose ]
Where:  filespec  is (are) the file(s) to be renamed (wildcards allowed)
/Verbose  displays the number of files renamed
Notes:  Use doublequotes if filespec contains spaces.
Return code (\"ErrorLevel\") equals the number of renamed files.
Switch may be abbreviated, e.g. /V instead of /Verbose.
Written by Rob van der Woude
*/
if ( !string.IsNullOrWhiteSpace( errorMessage ) )
{
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( "UpCase.exe, Version 1.02" );
Console.Error.WriteLine( "Rename specified files to all upper case" );
Console.Error.WriteLine( );
Console.Error.Write( "Usage:  " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.WriteLine( "UpCase.exe filespec [ /Verbose ]" );
Console.ResetColor( );
Console.Error.WriteLine( );
Console.Error.Write( "Where:  " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "filespec" );
Console.ResetColor( );
Console.Error.WriteLine( "  is (are) the file(s) to be renamed (wildcards allowed)" );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "     /V" );
Console.ResetColor( );
Console.Error.WriteLine( "erbose  displays the number of files renamed" );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Note:   Use doublequotes if filespec contains spaces." );
Console.Error.WriteLine( "     Return code (\"ErrorLevel\") equals the number of renamed files." );
Console.Error.Write( "     Switch may be abbreviated, e.g. " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/V" );
Console.ResetColor( );
Console.Error.Write( " instead of " );
Console.ForegroundColor = ConsoleColor.White;
Console.Error.Write( "/V" );
Console.ResetColor( );
Console.Error.WriteLine( "erbose." );
Console.Error.WriteLine( );
Console.Error.WriteLine( "Written by Rob van der Woude" );
Console.Error.WriteLine( "http://www.baidu.com" );
return 0;
}
}
}

希望本文所述对大家的C#程序设计有所帮助。

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