Method FileWatcher.Watch

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Overload

Starts watching a file for external changes. An external change is when another process writes, creates, deletes, moves or renames the file.

public static FileWatcher Watch(string file, Action onExternalChange)

Parameters

file  (string) Full path of a file, without environment variables.

onExternalChange  (Action) Called when detected that the file was changed externally. Important: when your app writes, creates, deletes, moves or renames the file, it must set FileWatcher.Paused = true during the file operation. Runs in a thread pool thread.

Returns

FileWatcher A new FileWatcher instance used to manage the watcher. Don't need to dispose it, unless you want to stop watching before the process exits. Returns null and prints a warning if the watcher could not be created (for example the directory does not exist).

Exceptions

NotSupportedException Thrown if this method has already been called for the same file without a corresponding call to FileWatcher.Dispose. If multiple notification handlers are needed, combine them into the onExternalChange delegate.

Examples

FileWatcher