FileSystemWatcher.OnChanged Method (System.IO)

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OnChanged Method

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This page is specific to

Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:

.NET Framework Class Library

FileSystemWatcher..::.OnChanged Method

Raises the Changed event.

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

Syntax

Visual Basic (Declaration)

Protected Sub OnChanged ( _
    e As FileSystemEventArgs _
)

Visual Basic (Usage)

Dim e As FileSystemEventArgs

Me.OnChanged(e)

protected void OnChanged(
    FileSystemEventArgs e
)

Visual C++

protected:
void OnChanged(
    FileSystemEventArgs^ e
)

JScript

protected function OnChanged(
    e : FileSystemEventArgs
)

Parameters

e: Type: System.IO..::.FileSystemEventArgs
A FileSystemEventArgs that contains the event data.

Remarks

OnChanged is called when changes are made to the size, system attributes, last write time, last access time, or security permissions of a file or directory in the directory being monitored.

Use the NotifyFilter property to restrict the number of events raised when the Changed event is handled.

The OnCreated event is raised as soon as a file is created. If a file is being copied or transferred into a watched directory, the OnCreated event will be raised immediately, followed by one or more OnChanged events.

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

Notes to Inheritors:

When overriding OnChanged in a derived class, be sure to call the base class's OnChanged method.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference

FileSystemWatcher Class

FileSystemWatcher Members

FileSystemEventHandler