Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
250 views
in Technique[技术] by (71.8m points)

c# - How do I find out how many files are in a directory?

I need to get a count of the number of files in a directory. I could get the names of all the files in the directory using System.IO.Directory.GetFiles() and take the length of that array but that takes too long on large directories. Is there a way to get just the count without having to get the names?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

I don't believe so, no - at least not in vanilla .NET. I suspect it's not the actual fetching of the names that takes the time - it's the OS walking through the directory internals. There may be a Win32 call you could make via P/Invoke.

How large is the directory you're looking at? In general it's at least traditionally not been a good idea to have more than a few hundred files in a directory. File systems have improved at this in general, but I don't know what the current state is with NTFS and Fat32.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...