CODEWITHSUNDEEP
c#linqdirectoryconsole-application
Jack.D
Jack.D

Reputation: 49

C# - Get subfolder name that contain specific character of file

I want to know which folder contains files which have a $ in their names.
But I will get duplicate folder names if I use this code:

string local = @"C:\test\";
string[] dirs = Directory.GetFiles(local, "*$*", SearchOption.AllDirectories);
foreach(string dir in dirs)
{
   string a = Path.GetFileName(Path.GetDirectoryName(dir));
}

This is the content of the test folder:

  • C:\test\20170321\$123.txt
  • C:\test\20170321\2$4.txt
  • C:\test\20170322\567.txt
  • C:\test\20170322\abc.txt

enter image description here

should be get result only 1 20170321

Upvotes: 1

Views: 3729

Answers (1)

Mong Zhu
Mong Zhu

Reputation: 23732

This should do it:

string local = @"C:\test\";
string[] dirs = Directory.GetFiles(local, "*$*", SearchOption.AllDirectories);
List<string> singleDirNames = dirs.Select(x=> Path.GetDirectoryName(x)).Distinct().ToList();

Explanation: Select from all filenames the directory and take only the distinct values of it into a list

EDIT:

As I just realized, you don't want the entire path, so to get the result from your post you need to use the Path.GetFileName() (there should be another way, I am looking for it):

List<string> singleDirNames = dirs
                           .Select(x=> Path.GetFileName(Path.GetDirectoryName(x)))
                           .Distinct().ToList();

Found it. Here would be actually the direct way to access the containing folder inspired by this answer:

List<string> singleDirNames = dirs.Select(x=> new FileInfo(x).Directory.Name)
                                  .Distinct().ToList();

Upvotes: 4

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