Get the (last part of) current directory name in C#

Question

I need to get the last part of current directory, for example from /Users/smcho/filegen_from_directory/AIRPassthrough, I need to get AIRPassthrough.

With python, I can get it with this code.

import os.path

path = "/Users/smcho/filegen_from_directory/AIRPassthrough"
print os.path.split(path)[-1]

Or

print os.path.basename(path)

How can I do the same thing with C#?

ADDED

With the help from the answerers, I found what I needed.

using System.Linq;
string fullPath = Path.GetFullPath(fullPath).TrimEnd(Path.DirectorySeparatorChar);
string projectName  = fullPath.Split(Path.DirectorySeparatorChar).Last();

or

string fullPath = Path.GetFullPath(fullPath).TrimEnd(Path.DirectorySeparatorChar);
string projectName = Path.GetFileName(fullPath);

Ballance

Several possible duplicates: #4471810 #2408405 https://mcmap.net/q/128928/-get-directory-from-full-path – Pianism

In python, you should rather do os.path.basename(path). – Dunsany

Answer 1

You're looking for Path.GetFileName.
Note that this won't work if the path ends in a \.

Crosstie

@anti: Wrong; I tried it. Strings are strings. Paste Path.GetFileName("/Users/smcho/filegen_from_directory/AIRPassthrough") into LINQPad if you don't believe me. – Crosstie

@antisanity No, it will return the directory name, but it probably is not exactly what the question was about. – Apolitical

@Jakob: Given the title, I think this is what the question is about. – Crosstie

I think maybe it dont work because windows directory seperator is \ not / – Negotiable

@Light: It does work; try it. The Path class handles both separators. – Crosstie

To have this work with a directory retrieved by Directory.GetDirectories use: string directoryName = Path.GetFileName(directory.TrimEnd(Path.DirectorySeparatorChar)); – Popularize

What if you want a directory and not a file name? – Coauthor

@KyleDelaney: It makes no difference; this just manipulates strings. – Crosstie

Answer 2

You could try:

var path = @"/Users/smcho/filegen_from_directory/AIRPassthrough/";
var dirName = new DirectoryInfo(path).Name;

Horehound

I like this better than the chosen answer. (Ab)using GetFileName is semantically wrong since it's a directory you're trying to retrieve. Also, to make GetFileName deterministic means you have to account for the possibility of a trailing forward slash or backslash, and trim it off, which is ugly. – Sturm

var dirName = new DirectoryInfo(Path.GetDirectoryName(pathWithFilename)).Name //is better – Plop

@kernowcode I believe that would return "filegen_from_directory" instead of ''AIRPassthrough" as requested by the OP. – Horehound

@SimonBrangwin I thought everything is a file in Linux :) – Whom

Answer 3

This is a slightly different answer, depending on what you have. If you have a list of files and need to get the name of the last directory that the file is in you can do this:

string path = "/attachments/1828_clientid/2938_parentid/somefiles.docx";
string result = new DirectoryInfo(path).Parent.Name;

This will return "2938_parentid"

Servais

Answer 4

Well, to exactly answer your question title :-)

var lastPartOfCurrentDirectoryName = 
   Path.GetFileName(Environment.CurrentDirectory);

Cuddy

Answer 5

rather then using the '/' for the call to split, better to use the Path.DirectorySeparatorChar :

like so:

path.split(Path.DirectorySeparatorChar).Last() 

Trudeau

One thing I don't like about using this solution is that it makes an assumption as to where the string is coming from. What if they're reading *nix logs on a Windows System? Then the wrong character will be utilized and you'll end up with the entire path, rather than the intended effect. Just my 2 cents. – Impressionist

i agree with you on this. the OP said 'last part of current directory' so for that, this is fine. – Hydroelectric

@BobG So from your point of view, what is better solution? – Araminta

Answer 6

var lastFolderName = Path.GetFileName(
    path.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar));

This works if the path happens to contain forward slash separators or backslash separators.

Blunder

The applied location of .TrimEnd() is incorrect. It should be applied to path, not Path.GetFileName. See the answer from @Popularize – Pedicure

Answer 7

Try this:

String newString = "";
String oldString = "/Users/smcho/filegen_from_directory/AIRPassthrough";

int indexOfLastSlash = oldString.LastIndexOf('/');

newString = oldString.Substring(indexOfLastSlash, oldString.Length);

Code may be off (I haven't tested it) but the idea should work.

Dyslexia

Answer 8

This works perfectly fine with me :)

Path.GetFileName(path.TrimEnd('\\')

Retire

Answer 9

You can also use the Uri class.

new Uri("file:///Users/smcho/filegen_from_directory/AIRPassthrough").Segments.Last()

You may prefer to use this class if you want to get some other segment, or if you want to do the same thing with a web address.

Theca

Answer 10

You can try below code :

Path.GetFileName(userpath)

Larousse