是否可以在DirectoryInfo.GetFiles上启用收益回报？

Question

I'm calling GetFiles and I must return the files found in all nested directories. I'd like to be able to do something with the found files as they get returned. Is it possible to call GetFiles in a way to allow yield return? Or is it necessary to roll my own version of GetFiles that uses yield return.

I was thinking of something like DirectoryInfo("MyDir").GetFiles("*.txt",SearchOptions.All).ForEach(dostuff)

where dostuff is a delegate

Answer 1

Yes, DirectoryInfo.EnumerateFiles returns a lazy-loaded IEnumerable

Documentation

Your line would be:

(new DirectoryInfo("MyDir")).EnumerateFiles("*.txt",SearchOptions.All).ForEach(dostuff)

Answer 2

Just use DirectoryInfo("MyDir").EnumerateFiles() , it already does a yield return for you.

It is available from .NET 4 and returns an IEnumerable<FileInfo> .