FileSystemInfo Classe

Definizione

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

Ereditarietà

Object

FileSystemInfo

Ereditarietà

Object

MarshalByRefObject

FileSystemInfo

Derivato

System.IO.DirectoryInfo

System.IO.FileInfo

Attributi

SerializableAttribute ComVisibleAttribute

Implementazioni

ISerializable

Esempio

Nell'esempio seguente viene illustrato come scorrere tutti i file e le directory, eseguendo query su alcune informazioni su ogni voce.

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

Commenti

La FileSystemInfo classe contiene metodi comuni alla manipolazione di file e directory. Un FileSystemInfo oggetto può rappresentare un file o una directory, fungendo quindi da base per FileInfo gli oggetti o DirectoryInfo . Usare questa classe di base durante l'analisi di molti file e directory.

Una classe derivata può ereditare da FileSystemInfo solo se la classe derivata dispone dell'autorizzazione AllAccess dall'enumerazione FileIOPermissionAccess .

Nei membri che accettano un percorso, il percorso può fare riferimento a un file o solo a una directory. Il percorso specificato può anche fare riferimento a un percorso relativo o a un percorso UNC (Universal Naming Convention) per un server e un nome di condivisione. Ad esempio, tutti i percorsi seguenti sono accettabili:

• "c:\\MyDir\\MyFile.txt" in C# o "c:\MyDir\MyFile.txt" in Visual Basic.

• "c:\\MyDir" in C#o "c:\MyDir" in Visual Basic.

• "MyDir\\MySubdir" in C#, o "MyDir\MySubDir" in Visual Basic.

• "\\\MyServer\\MyShare" in C#, o "\\MyServer\MyShare" in Visual Basic.

Per un elenco delle attività di I/O comuni, vedere Attività di I/O comuni.

Vedi anche

• FileSystemWatcher
• DriveInfo
• I/O di file e di flussi
• Procedura: Leggere testo da un file
• Procedura: Scrivere testo in un file
• Procedura: Leggere e scrivere in un file di dati appena creato