語言

DriveInfo.IsReady 屬性

定義

命名空間:
System.IO
組件:
netstandard.dll, System.IO.FileSystem.DriveInfo.dll
組件:
System.IO.FileSystem.DriveInfo.dll
組件:
mscorlib.dll
組件:
netstandard.dll
來源:
DriveInfo.cs
來源:
DriveInfo.cs
來源:
DriveInfo.cs
來源:
DriveInfo.cs
來源:
DriveInfo.cs

會得到一個表示硬碟是否已準備好的值。

public:
 property bool IsReady { bool get(); };
public bool IsReady { get; }
member this.IsReady : bool
Public ReadOnly Property IsReady As Boolean

屬性值

Boolean

true 如果硬碟準備好了; false 如果硬碟還沒準備好。

範例

以下程式碼範例示範如何利用類別 DriveInfo 顯示目前系統中所有硬碟的資訊。

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)
            {
                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

IsReady 表示硬碟是否已準備好。 例如，它會顯示 CD 是否在 CD 光碟機中，或是可移動式儲存裝置是否已準備好進行讀寫操作。 如果你不測試硬碟是否準備好，且它確實未準備好，使用查詢 DriveInfo 磁碟機會產生 IOException一個 。

不要依賴 來 IsReady 避免其他成員 TotalSize如 、 TotalFreeSpace、 DriveFormat的例外。 在你的程式碼檢查 IsReady 並存取其他屬性的時間之間（即使存取是在檢查後立即進行），可能已經斷開硬碟或移除了磁碟。

適用於