FileSystemInfo Classe

Definição

public ref class FileSystemInfo abstract

public ref class FileSystemInfo abstract : MarshalByRefObject, System::Runtime::Serialization::ISerializable

public abstract class FileSystemInfo

public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

[System.Serializable]
public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class FileSystemInfo : MarshalByRefObject, System.Runtime.Serialization.ISerializable

type FileSystemInfo = class

type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

[<System.Serializable>]
type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type FileSystemInfo = class
    inherit MarshalByRefObject
    interface ISerializable

Public MustInherit Class FileSystemInfo

Public MustInherit Class FileSystemInfo
Inherits MarshalByRefObject
Implements ISerializable

Herança

Object

FileSystemInfo

Herança

Object

MarshalByRefObject

FileSystemInfo

Derivado

System.IO.DirectoryInfo

System.IO.FileInfo

Atributos

SerializableAttribute ComVisibleAttribute

Implementações

ISerializable

Exemplos

O exemplo seguinte mostra como percorrer todos os ficheiros e diretórios, consultando alguma informação sobre cada entrada.

using System;
using System.IO;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            //  Loop through all the immediate subdirectories of C.
            foreach (string entry in Directory.GetDirectories(@"C:\"))
            {
                DisplayFileSystemInfoAttributes(new DirectoryInfo(entry));
            }
            //  Loop through all the files in C.
            foreach (string entry in Directory.GetFiles(@"C:\"))
            {
                DisplayFileSystemInfoAttributes(new FileInfo(entry));
            }
        }
        static void DisplayFileSystemInfoAttributes(FileSystemInfo fsi)
        {
            //  Assume that this entry is a file.
            string entryType = "File";

            // Determine if entry is really a directory
            if ((fsi.Attributes & FileAttributes.Directory) == FileAttributes.Directory )
            {
                entryType = "Directory";
            }
            //  Show this entry's type, name, and creation date.
            Console.WriteLine("{0} entry {1} was created on {2:D}", entryType, fsi.FullName, fsi.CreationTime);
        }
    }
}

 // Output will vary based on contents of drive C.

 // Directory entry C:\Documents and Settings was created on Tuesday, November 25, 2003
 // Directory entry C:\Inetpub was created on Monday, January 12, 2004
 // Directory entry C:\Program Files was created on Tuesday, November 25, 2003
 // Directory entry C:\RECYCLER was created on Tuesday, November 25, 2003
 // Directory entry C:\System Volume Information was created on Tuesday, November 2, 2003
 // Directory entry C:\WINDOWS was created on Tuesday, November 25, 2003
 // File entry C:\IO.SYS was created on Tuesday, November 25, 2003
 // File entry C:\MSDOS.SYS was created on Tuesday, November 25, 2003
 // File entry C:\pagefile.sys was created on Saturday, December 27, 2003

Imports System.IO
Module Module1

    Sub Main()
        ' Loop through all the immediate subdirectories of C.
        For Each entry As String In Directory.GetDirectories("C:\")
            DisplayFileSystemInfoAttributes(New DirectoryInfo(entry))
        Next

        ' Loop through all the files in C.
        For Each entry As String In Directory.GetFiles("C:\")
            DisplayFileSystemInfoAttributes(New FileInfo(entry))
        Next
    End Sub

    Sub DisplayFileSystemInfoAttributes(ByVal fsi As IO.FileSystemInfo)
        ' Assume that this entry is a file.
        Dim entryType As String = "File"

        ' Determine if this entry is really a directory.
        If (fsi.Attributes And FileAttributes.Directory) = FileAttributes.Directory Then
            entryType = "Directory"
        End If

        ' Show this entry's type, name, and creation date.
        Console.WriteLine("{0} entry {1} was created on {2:D}", _
            entryType, fsi.FullName, fsi.CreationTime)
    End Sub
End Module

' Output will vary based on contents of drive C.
' 
' Directory entry C:\Documents and Settings was created on Tuesday, November 25, 2003
' Directory entry C:\Inetpub was created on Monday, January 12, 2004
' Directory entry C:\Program Files was created on Tuesday, November 25, 2003
' Directory entry C:\RECYCLER was created on Tuesday, November 25, 2003
' Directory entry C:\System Volume Information was created on Tuesday, November 2, 2003
' Directory entry C:\WINDOWS was created on Tuesday, November 25, 2003
' File entry C:\IO.SYS was created on Tuesday, November 25, 2003
' File entry C:\MSDOS.SYS was created on Tuesday, November 25, 2003
' File entry C:\pagefile.sys was created on Saturday, December 27, 2003

Observações

A FileSystemInfo classe contém métodos comuns à manipulação de ficheiros e diretórios. Um objeto pode representar tanto um ficheiro como um diretório, servindo FileSystemInfo assim de base para FileInfo objetos de OUR DirectoryInfo . Usa esta classe base ao analisar muitos ficheiros e diretórios.

Uma classe derivada só pode herdar de FileSystemInfo se a classe derivada tiver a permissão AllAccess da FileIOPermissionAccess enumeração.

Nos membros que aceitam um caminho, o caminho pode referir-se a um ficheiro ou apenas a um diretório. O caminho especificado pode também referir-se a um caminho relativo ou a um caminho da Convenção de Nomeação Universal (UNC) para um nome de servidor e partilha. Por exemplo, todos os seguintes são caminhos aceitáveis:

• "c:\\MyDir\\MyFile.txt" em C#, ou "c:\MyDir\MyFile.txt" em Visual Basic.

• "c:\\MyDir" em C#, ou "c:\MyDir" no Visual Basic.

• "MyDir\\MySubdir" em C#, ou "MyDir\MySubDir" em Visual Basic.

• "\\\\MyServer\\MyShare" em C#, ou "\\MyServer\MyShare" no Visual Basic.

Para uma lista de tarefas comuns de E/S, consulte Tarefas Comuns de E/S.

Ver também

• FileSystemWatcher
• DriveInfo
• E/S de arquivo e fluxo
• Como: Ler texto de um arquivo
• Como: Gravar texto em um arquivo
• Como: Ler e gravar em um arquivo de dados recém-criado