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Directory.Exists Method

Determines whether the given path refers to an existing directory on disk.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

public:
static bool Exists (
	String^ path
)
public static boolean Exists (
	String path
)
public static function Exists (
	path : String
) : boolean
Not applicable.

Parameters

path

The path to test.

Return Value

true if path refers to an existing directory; otherwise, false.

The path parameter is permitted to specify relative or absolute path information. Relative path information is interpreted as relative to the current working directory.

Trailing spaces are removed from the end of the path parameter before checking whether the directory exists.

The path parameter is not case-sensitive.

The Exists method does not perform network authentication. If you query an existing network share without being pre-authenticated, the Exists method will return false.

The following table lists examples of other typical or related I/O tasks.

For a list of common I/O tasks, see Common I/O Tasks.

The following code example takes an array of file or directory names on the command line, determines what kind of name it is, and processes it appropriately.

// For File::Exists, Directory::Exists
using namespace System;
using namespace System::IO;
using namespace System::Collections;

// Insert logic for processing found files here.
void ProcessFile( String^ path )
{
   Console::WriteLine( "Processed file '{0}'.", path );
}


// Process all files in the directory passed in, recurse on any directories 
// that are found, and process the files they contain.
void ProcessDirectory( String^ targetDirectory )
{
   
   // Process the list of files found in the directory.
   array<String^>^fileEntries = Directory::GetFiles( targetDirectory );
   IEnumerator^ files = fileEntries->GetEnumerator();
   while ( files->MoveNext() )
   {
      String^ fileName = safe_cast<String^>(files->Current);
      ProcessFile( fileName );
   }

   
   // Recurse into subdirectories of this directory.
   array<String^>^subdirectoryEntries = Directory::GetDirectories( targetDirectory );
   IEnumerator^ dirs = subdirectoryEntries->GetEnumerator();
   while ( dirs->MoveNext() )
   {
      String^ subdirectory = safe_cast<String^>(dirs->Current);
      ProcessDirectory( subdirectory );
   }
}

int main( int argc, char *argv[] )
{
   for ( int i = 1; i < argc; i++ )
   {
      String^ path = gcnew String(argv[ i ]);
      if ( File::Exists( path ) )
      {
         
         // This path is a file
         ProcessFile( path );
      }
      else
      if ( Directory::Exists( path ) )
      {
         
         // This path is a directory
         ProcessDirectory( path );
      }
      else
      {
         Console::WriteLine( "{0} is not a valid file or directory.", path );
      }

   }
}


// For File.Exists, Directory.Exists
import System.*;
import System.IO.*;
import System.Collections.*;

public class RecursiveFileProcessor
{
    public static void main(String[] args)
    {
        for (int iCtr = 0; iCtr < args.get_Length(); iCtr++) {
            String path = args[iCtr];
            if (File.Exists(path)) {
                // This path is a file
                ProcessFile(path);
            }
            else {
                if (Directory.Exists(path)) {
                    // This path is a directory
                    ProcessDirectory(path);
                }
                else {
                    Console.WriteLine("{0} is not a valid file or directory.",
                        path);
                }
            }
        }
    } //main

    // Process all files in the directory passed in, recurse on any directories 
    // that are found, and process the files they contain.
    public static void ProcessDirectory(String targetDirectory)
    {
        // Process the list of files found in the directory.
        String fileEntries[] = Directory.GetFiles(targetDirectory);
        for (int iCtr1 = 0; iCtr1 < fileEntries.get_Length(); iCtr1++) {
            String fileName = fileEntries[iCtr1];
            ProcessFile(fileName);
        }
        // Recurse into subdirectories of this directory.
        String subDirectoryEntries[] = 
            Directory.GetDirectories(targetDirectory);
        for (int iCtr2 = 0; iCtr2 < subDirectoryEntries.get_Length(); 
            iCtr2++) {
            String subDirectory = subDirectoryEntries[iCtr2];
            ProcessDirectory(subDirectory);
        }
    } //ProcessDirectory

    // Insert logic for processing found files here.
    public static void ProcessFile(String path)
    {
        Console.WriteLine("Processed file '{0}'.", path);
    } //ProcessFile
} //RecursiveFileProcessor

//For Directory.GetFiles and Directory.GetDirectories
import System;
import System.IO;
import System.Collections;

// For File.Exists, Directory.Exists 
// Takes an array of file names or directory names on the command line.  
// Determines what kind of name it is and processes it appropriately
public class RecursiveFileProcessor {
    public static function Main(args : String[]) : void  {
        for(var i : int in args) {
            var path : String = args[i];
            if (File.Exists(path)) {
                // This path is a file
                ProcessFile(path); 
            }               
            else if(Directory.Exists(path)) {
                // This path is a directory
                ProcessDirectory(path);
            }
            else {
                Console.WriteLine("{0} is not a valid file or directory.", path);
            }        
        }        
    }


    // Process all files in the directory passed in, and recurse on any directories 
    // that are found to process the files they contain
    public static function ProcessDirectory(targetDirectory : String) : void  {
        // Process the list of files found in the directory
        var fileEntries : String [] = Directory.GetFiles(targetDirectory);
        for (var i : int in fileEntries)
    	    ProcessFile(fileEntries[i]);

        // Recurse into subdirectories of this directory
        var subdirectoryEntries : String[] = Directory.GetDirectories(targetDirectory);
        for (i in subdirectoryEntries)
            ProcessDirectory(subdirectoryEntries[i]);
    }
        
    // Real logic for processing found files would go here.
    public static function ProcessFile(path : String) : void  {
        Console.WriteLine("Processed file '{0}'.", path);	    
    }
}

// For JScript there is no 'Main' routine defined and hence the command line arguments
// have to be obtained with a call to System.Environment.GetCommandLineArgs
RecursiveFileProcessor.Main(System.Environment.GetCommandLineArgs());

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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