DriveInfo.GetDrives 方法

定义

检索计算机上的所有逻辑驱动器的驱动器名称。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()

返回

DriveInfo[]

DriveInfo 类型的数组,表示计算机上的逻辑驱动器。An array of type DriveInfo that represents the logical drives on a computer.

例外

发生了 I/O 错误(例如,磁盘错误或驱动器未准备好)。An I/O error occurred (for example, a disk error or a drive was not ready).

调用方没有所要求的权限。The caller does not have the required permission.

示例

下面的代码示例演示如何使用 DriveInfo 类显示有关当前系统上所有驱动器的信息。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.

注解

此方法检索计算机上的所有逻辑驱动器名称。This method retrieves all logical drive names on a computer. 您可以使用此信息来循环访问数组,并使用其他方法和属性获取有关驱动器的信息 DriveInfoYou can use this information to iterate through the array and obtain information on the drives using other DriveInfo methods and properties. 使用 IsReady 属性测试驱动器是否已准备就绪,因为在未就绪的驱动器上使用此方法将引发 IOExceptionUse 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.

适用于

另请参阅