RenamedEventArgs-Klasse

Stellt Daten für das Renamed-Ereignis bereit.

Namespace: System.IO
Assembly: System (in system.dll)

Syntax

'Declaration
Public Class RenamedEventArgs
    Inherits FileSystemEventArgs
'Usage
Dim instance As RenamedEventArgs

public class RenamedEventArgs : FileSystemEventArgs

public ref class RenamedEventArgs : public FileSystemEventArgs

public class RenamedEventArgs extends FileSystemEventArgs

public class RenamedEventArgs extends FileSystemEventArgs

Hinweise

Diese Klasse erbt von FileSystemEventArgs und erweitert dieses durch Hinzufügen von Feldern für den vorherigen Namen und den vorherigen vollständigen Pfad. Dadurch kann der ursprüngliche Name und der vollständige Pfad der betroffenen Datei oder des Verzeichnisses angegeben werden.

Beispiel

Im folgenden Beispiel wird die Erstellung einer FileSystemWatcher-Komponente veranschaulicht, mit der Dateiänderungen (Erstellen, Löschen, Umbenennen, Änderungen) auf einem Laufwerk überwacht werden sollen. Im Beispiel wird auch veranschaulicht, wie Fehlerbenachrichtigungen ordnungsgemäß empfangen werden.

Imports System.IO

Module Module1
    Sub Main()
        ' Create a FileSystemWatcher to monitor all files on drive C.
        Dim fsw As New FileSystemWatcher("C:\")

        ' Watch for changes in LastAccess and LastWrite times, and
        ' the renaming of files or directories. 
        fsw.NotifyFilter = (NotifyFilters.LastAccess Or NotifyFilters.LastWrite _ 
            Or NotifyFilters.FileName Or NotifyFilters.DirectoryName)

        ' Register a handler that gets called when a 
        ' file is created, changed, or deleted.
        AddHandler fsw.Changed, New FileSystemEventHandler(AddressOf OnChanged)

        ' The commented line of code below is a shorthand of the above line.
        ' AddHandler fsw.Changed, AddressOf OnChanged

        ' NOTE: The shorthand version is used in the remainder of this code.
        ' FileSystemEventHandler
        AddHandler fsw.Created, AddressOf OnChanged 
        ' FileSystemEventHandler
        AddHandler fsw.Deleted, AddressOf OnChanged

        ' Register a handler that gets called when a file is renamed.
        ' RenamedEventHandler
        AddHandler fsw.Renamed, AddressOf OnRenamed

        ' Register a handler that gets called if the 
        ' FileSystemWatcher needs to report an error.
        ' ErrorEventHandler
        AddHandler fsw.Error, AddressOf OnError

        ' Begin watching.
        fsw.EnableRaisingEvents = True

        ' Wait for the user to quit the program.
        Console.WriteLine("Press 'Enter' to quit the sample.")
        Console.ReadLine()
    End Sub

    ' This method is called when a file is created, changed, or deleted.
    Private Sub OnChanged(ByVal source As Object, ByVal e As FileSystemEventArgs)

        ' Show that a file has been created, changed, or deleted.
        Dim wct As WatcherChangeTypes = e.ChangeType
        Console.WriteLine("File {0} {1}", e.FullPath, wct.ToString())
    End Sub

    ' This method is called when a file is renamed.
    Private Sub OnRenamed(ByVal source As Object, ByVal e As RenamedEventArgs)

        ' Show that a file has been renamed.
        Dim wct As WatcherChangeTypes = e.ChangeType
        Console.WriteLine("File {0} {2} to {1}", e.OldFullPath, e.FullPath, wct.ToString())
    End Sub

    ' This method is called when the FileSystemWatcher detects an error.
    Private Sub OnError(ByVal source As Object, ByVal e As ErrorEventArgs)

        ' Show that an error has been detected.
        Console.WriteLine("The FileSystemWatcher has detected an error")

        ' Give more information if the error is due to an internal buffer overflow.
        If TypeOf e.GetException Is InternalBufferOverflowException Then
            ' This can happen if Windows is reporting many file system events quickly 
            ' and internal buffer of the  FileSystemWatcher is not large enough to handle this
            ' rate of events. The InternalBufferOverflowException error informs the application
            ' that some of the file system events are being lost.
            Console.WriteLine( _
                "The file system watcher experienced an internal buffer overflow: " _
                + e.GetException.Message)
        End If
    End Sub
End Module

Vererbungshierarchie

System.Object
   System.EventArgs
     System.IO.FileSystemEventArgs
      System.IO.RenamedEventArgs

Threadsicherheit

Alle öffentlichen statischen (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.

Plattformen

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

RenamedEventArgs-Member
System.IO-Namespace
FileSystemEventArgs-Klasse
FileSystemEventHandler-Delegat
FileSystemWatcher-Klasse
InternalBufferOverflowException-Klasse
NotifyFilters-Enumeration
OnRenamed
FileSystemWatcher.Renamed-Ereignis
RenamedEventHandler
WaitForChangedResult
WatcherChangeTypes