DriveInfo.GetDrives 方法

定義

命名空間:

System.IO

組件:

System.IO.FileSystem.DriveInfo.dll

組件:

mscorlib.dll

組件:

netstandard.dll

擷取電腦上所有邏輯磁碟的磁碟名稱。

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()

傳回

DriveInfo[]

DriveInfo 類型的陣列，代表電腦上的邏輯磁碟機。

例外狀況

IOException

發生 I/O 錯誤 (例如，磁碟錯誤或磁碟尚未就緒)。

UnauthorizedAccessException

呼叫端沒有必要的權限。

範例

下列程式碼範例示範 如何使用 DriveInfo 類別來顯示目前系統上所有磁片磁碟機的相關資訊。

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.

備註

此方法會擷取電腦上的所有邏輯磁片磁碟機名稱。 您可以使用這項資訊逐一查看陣列，並使用其他 DriveInfo 方法和屬性取得磁片磁碟機的相關資訊。 IsReady使用 屬性來測試磁片磁碟機是否就緒，因為在尚未就緒的磁片磁碟機上使用這個方法會擲回 IOException 。

另請參閱

• 檔案和資料流 I/O