DriveInfo.IsReady DriveInfo.IsReady DriveInfo.IsReady DriveInfo.IsReady Property

定義

取得值,這個值表示磁碟機是否已就緒。Gets a value that indicates whether a drive is ready.

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

屬性值

若磁碟就緒則為 true,否則為 falsetrue if the drive is ready; false if the drive is not ready.

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。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.

備註

IsReady指出磁片磁碟機是否已就緒。IsReady indicates whether a drive is ready. 例如, 它會指出 CD 是否在 CD 光碟機, 或卸載式存放裝置是否準備好進行讀取/寫入作業。For example, it indicates whether a CD is in a CD drive or whether a removable storage device is ready for read/write operations. 如果您不測試磁片磁碟機是否已就緒, 而且尚未準備好, 使用DriveInfo來查詢磁片磁碟機將會IOException引發。If you do not test whether a drive is ready, and it is not ready, querying the drive using DriveInfo will raise an IOException.

請勿依賴IsReady來避免攔截來自其他成員TotalSize(例如、 TotalFreeSpaceDriveFormat) 的例外狀況。Do not rely on IsReady to avoid catching exceptions from other members such as TotalSize, TotalFreeSpace, and DriveFormat. 在您的程式碼檢查IsReady的時間, 然後存取其中一個其他屬性 (即使存取在檢查之後立即發生), 磁片磁碟機可能已中斷連線, 或可能已移除磁片。Between the time that your code checks IsReady and then accesses one of the other properties (even if the access occurs immediately after the check), a drive may have been disconnected or a disk may have been removed.

適用於