public IEnumerable <string> GetFiles(string folder)
{
// The method has not made a recursive call yet.
if (_counter == 0)
{
OnSearchStarted(EventArgs.Empty);
}
_counter++;
IEnumerable <string> files = null;
try
{
files = Directory.GetFileSystemEntries(folder);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw;
}
foreach (var file in files)
{
var isDirectory = Directory.Exists(file);
var eventArgs = new FileEntryReachedEventArgs(file, DateTime.Now, _cancellationTokenSource);
var isFiltered = FilterFileEntryDel?.Invoke(file) == true;
if (_cancellationTokenSource.Token.IsCancellationRequested)
{
Console.WriteLine("The search has been terminated.");
break;
}
if (isDirectory)
{
OnDirectoryFound(eventArgs);
}
if (!isDirectory)
{
OnFileFound(eventArgs);
}
// Fire a corresponding event to every file that was filtered.
if (isFiltered && isDirectory)
{
OnFilteredDirectoryFound(eventArgs);
}
if (isFiltered && !isDirectory)
{
OnFilteredFileFound(eventArgs);
}
if (isFiltered && isDirectory)
{
foreach (var f in GetFiles(file))
{
yield return(f);
}
}
if (eventArgs.Exclude)
{
Console.WriteLine("File {0} was excluded.", file);
continue;
}
else
{
yield return(file);
}
}
_counter--;
// All recursive calls have been executed.
if (_counter == 0)
{
OnSearchFinished(EventArgs.Empty);
}
}
protected virtual void OnFilteredDirectoryFound(FileEntryReachedEventArgs e)
{
EventHandler <FileEntryReachedEventArgs> handler = FilteredDirectoryFound;
handler?.Invoke(this, e);
}
