| Description |
|
The OnChanged method is called when the Changed event is triggered.
|
| | Notes | The author was unable to get the OnChanged method invoked in the sample code. Am awaiting a response from Borland to help on this matter.
|
|
| Microsoft MSDN Links |
System.IO
System.IO.FileSystemWatcher
|
|
|
| A simple example |
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
// Class definition code
type
MyWatcherClass = Class(System.IO.FileSystemWatcher)
published
procedure OnChanged (Events : FileSystemEventArgs);
end;
var
MyWatcher : MyWatcherClass;
procedure MyWatcherClass.OnChanged(Events: FileSystemEventArgs);
begin
// It is crucial that the inherited OnChanged method is called
inherited OnChanged(Events);
// Indicate that we have detected a file or folder change
Console.WriteLine(Events.FullPath + ' has changed');
end;
// Main code
begin
// Create an object inherited from the FileSystemWatcher class
MyWatcher := MyWatcherClass.Create('C:\');
// Watch for any file access at all
MyWatcher.NotifyFilter := NotifyFilters.LastAccess;
// Now we wait until an event occurs -
// MyWatcher will notify us of changes
MyWatcher.WaitForChanged(WatcherChangeTypes.Changed);
Console.WriteLine('Done');
Console.Readline;
end.
| | Show full unit code | It was expected that when accessing a file in the C:\ folder would have triggered the OnChanged method, but this was not the case.
|
| |
|
|
|