WaitForChanged() [2/2]

WaitForChangedResult System.IO.FileSystemWatcher.WaitForChanged ( WatcherChangeTypes changeType, int timeout )

inline

Definition at line 588 of file FileSystemWatcher.cs.

    {
        TaskCompletionSource<WaitForChangedResult> tcs = new TaskCompletionSource<WaitForChangedResult>();
        FileSystemEventHandler fileSystemEventHandler = null;
        RenamedEventHandler renamedEventHandler = null;
        if ((changeType & (WatcherChangeTypes.Created | WatcherChangeTypes.Deleted | WatcherChangeTypes.Changed)) != 0)
        {
            fileSystemEventHandler = delegate(object s, FileSystemEventArgs e)
            {
                if ((e.ChangeType & changeType) != 0)
                {
                    tcs.TrySetResult(new WaitForChangedResult(e.ChangeType, e.Name, null, timedOut: false));
                }
            };
            if ((changeType & WatcherChangeTypes.Created) != 0)
            {
                Created += fileSystemEventHandler;
            }
            if ((changeType & WatcherChangeTypes.Deleted) != 0)
            {
                Deleted += fileSystemEventHandler;
            }
            if ((changeType & WatcherChangeTypes.Changed) != 0)
            {
                Changed += fileSystemEventHandler;
            }
        }
        if ((changeType & WatcherChangeTypes.Renamed) != 0)
        {
            renamedEventHandler = delegate(object s, RenamedEventArgs e)
            {
                if ((e.ChangeType & changeType) != 0)
                {
                    tcs.TrySetResult(new WaitForChangedResult(e.ChangeType, e.Name, e.OldName, timedOut: false));
                }
            };
            Renamed += renamedEventHandler;
        }
        try
        {
            bool enableRaisingEvents = EnableRaisingEvents;
            if (!enableRaisingEvents)
            {
                EnableRaisingEvents = true;
            }
            tcs.Task.Wait(timeout);
            EnableRaisingEvents = enableRaisingEvents;
        }
        finally
        {
            if (renamedEventHandler != null)
            {
                Renamed -= renamedEventHandler;
            }
            if (fileSystemEventHandler != null)
            {
                if ((changeType & WatcherChangeTypes.Changed) != 0)
                {
                    Changed -= fileSystemEventHandler;
                }
                if ((changeType & WatcherChangeTypes.Deleted) != 0)
                {
                    Deleted -= fileSystemEventHandler;
                }
                if ((changeType & WatcherChangeTypes.Created) != 0)
                {
                    Created -= fileSystemEventHandler;
                }
            }
        }
        if (!tcs.Task.IsCompletedSuccessfully)
        {
            return WaitForChangedResult.TimedOutResult;
        }
        return tcs.Task.Result;
    }

References System.IO.FileSystemWatcher.Changed, System.IO.FileSystemEventArgs.ChangeType, System.IO.FileSystemWatcher.Created, System.IO.FileSystemWatcher.Deleted, System.IO.FileSystemWatcher.EnableRaisingEvents, System.IO.FileSystemEventArgs.Name, System.IO.RenamedEventArgs.OldName, System.IO.FileSystemWatcher.Renamed, System.s, System.IO.WaitForChangedResult.TimedOutResult, and System.timeout.