DriveInfo.GetDrives Metodo

Definizione

Recupera i nomi di tutte le unità logiche in un computer.Retrieves the drive names of all logical drives on a computer.

public:
 static cli::array <System::IO::DriveInfo ^> ^ GetDrives();
public static System.IO.DriveInfo[] GetDrives ();
static member GetDrives : unit -> System.IO.DriveInfo[]
Public Shared Function GetDrives () As DriveInfo()

Restituisce

DriveInfo[]

Matrice di tipo DriveInfo che rappresenta le unità logiche in un computer.An array of type DriveInfo that represents the logical drives on a computer.

Eccezioni

Si è verificato un errore di I/O, ad esempio un errore del disco oppure un'unità non pronta.An I/O error occurred (for example, a disk error or a drive was not ready).

Il chiamante non dispone dell'autorizzazione richiesta.The caller does not have the required permission.

Esempio

Nell'esempio di codice riportato di seguito viene illustrato l'utilizzo della DriveInfo classe per visualizzare informazioni su tutte le unità del sistema corrente.The following code example demonstrates the use of the DriveInfo class to display information about all of the drives on the current system.

using System;
using System.IO;

class Test
{
    public static void Main()
    {
        DriveInfo[] allDrives = DriveInfo.GetDrives();

        foreach (DriveInfo d in allDrives)
        {
            Console.WriteLine("Drive {0}", d.Name);
            Console.WriteLine("  Drive type: {0}", d.DriveType);
            if (d.IsReady == true)
            {
                Console.WriteLine("  Volume label: {0}", d.VolumeLabel);
                Console.WriteLine("  File system: {0}", d.DriveFormat);
                Console.WriteLine(
                    "  Available space to current user:{0, 15} bytes",
                    d.AvailableFreeSpace);

                Console.WriteLine(
                    "  Total available space:          {0, 15} bytes",
                    d.TotalFreeSpace);

                Console.WriteLine(
                    "  Total size of drive:            {0, 15} bytes ",
                    d.TotalSize);
            }
        }
    }
}
/*
This code produces output similar to the following:

Drive A:\
  Drive type: Removable
Drive C:\
  Drive type: Fixed
  Volume label:
  File system: FAT32
  Available space to current user:     4770430976 bytes
  Total available space:               4770430976 bytes
  Total size of drive:                10731683840 bytes
Drive D:\
  Drive type: Fixed
  Volume label:
  File system: NTFS
  Available space to current user:    15114977280 bytes
  Total available space:              15114977280 bytes
  Total size of drive:                25958948864 bytes
Drive E:\
  Drive type: CDRom

The actual output of this code will vary based on machine and the permissions
granted to the user executing it.
*/
Imports System.IO

Class Test
    Public Shared Sub Main()
        Dim allDrives() As DriveInfo = DriveInfo.GetDrives()

        Dim d As DriveInfo
        For Each d In allDrives
            Console.WriteLine("Drive {0}", d.Name)
            Console.WriteLine("  Drive type: {0}", d.DriveType)
            If d.IsReady = True Then
                Console.WriteLine("  Volume label: {0}", d.VolumeLabel)
                Console.WriteLine("  File system: {0}", d.DriveFormat)
                Console.WriteLine( _
                    "  Available space to current user:{0, 15} bytes", _
                    d.AvailableFreeSpace)

                Console.WriteLine( _
                    "  Total available space:          {0, 15} bytes", _
                    d.TotalFreeSpace)

                Console.WriteLine( _
                    "  Total size of drive:            {0, 15} bytes ", _
                    d.TotalSize)
            End If
        Next
    End Sub
End Class
'This code produces output similar to the following:
'
'Drive A:\
'  Drive type: Removable
'Drive C:\
'  Drive type: Fixed
'  Volume label: 
'  File system: FAT32
'  Available space to current user:     4770430976 bytes
'  Total available space:               4770430976 bytes
'  Total size of drive:                10731683840 bytes 
'Drive D:\
'  Drive type: Fixed
'  Volume label: 
'  File system: NTFS
'  Available space to current user:    15114977280 bytes
'  Total available space:              15114977280 bytes
'  Total size of drive:                25958948864 bytes 
'Drive E:\
'  Drive type: CDRom
'
'The actual output of this code will vary based on machine and the permissions
'granted to the user executing it.

Commenti

Questo metodo recupera tutti i nomi delle unità logiche in un computer.This method retrieves all logical drive names on a computer. È possibile utilizzare queste informazioni per scorrere la matrice e ottenere informazioni sulle unità utilizzando altri DriveInfo metodi e proprietà.You can use this information to iterate through the array and obtain information on the drives using other DriveInfo methods and properties. Utilizzare la IsReady proprietà per verificare se un'unità è pronta perché l'utilizzo di questo metodo su un'unità non pronta genererà un'operazione IOException .Use the IsReady property to test whether a drive is ready because using this method on a drive that is not ready will throw a IOException.

Si applica a