0

If path = "\ProgramFiles\MobileApp\es-gl\a.dll". I want to get "\ProgramFiles\MobileApp\es-gl" alone. Just want to know the parent directory of the file a.dll. Is there Any inbuilt method in c#? I am using .net Compact Framework

Krunal Mevada
  • 1,637
  • 1
  • 17
  • 28
Badhri Ravikumar
  • 69
  • 3
  • 13

6 Answers6

7

System.IO.Path.GetDirectoryName(path)

Jason Williams
  • 56,972
  • 11
  • 108
  • 137
3

I'm not sure but I think the FileInfo and DirectoryInfo classes are supported on the Compact Framework.

Try this:

FileInfo myFile = new FileInfo("\ProgramFiles\MobileApp\es-gl\a.dll");
string parentDirectory = myFile.Directory.Name;

According to the MSDN documentation you could also do this:

FileInfo myFile = new FileInfo("\ProgramFiles\MobileApp\es-gl\a.dll");
string parentDirectory = myFile.DirectoryName;

Check out these MSDN links for more info:

http://msdn.microsoft.com/en-us/library/system.io.fileinfo_members(v=vs.71)

http://msdn.microsoft.com/en-us/library/system.io.fileinfo.directory(v=vs.71)

weston
  • 54,145
  • 21
  • 145
  • 203
Gerald Versluis
  • 30,492
  • 6
  • 73
  • 100
3

I also needed such a function to find the parent directory of a folder seamlessly. So I created one myself:

        public static string ExtractFolderFromPath(string fileName, string pathSeparator, bool includeSeparatorAtEnd)
        {
            int pos = fileName.LastIndexOf(pathSeparator);
            return fileName.Substring(0,(includeSeparatorAtEnd ? pos+1 : pos));
        }

Just send pathSeparator ("\" for windows and "/" for unix-like paths). set last parameter true if you want separator included at the end. for ex: C:\foo\

Prahlad Yeri
  • 3,567
  • 4
  • 25
  • 55
  • 1
    At least use `System.IO.Path.DirectorySeparatorChar` – weston Aug 08 '12 at 10:20
  • @weston - In my ftp program, this won't work. I have to handle both local directory splitter ("\") and the remote ftp folder splitter ("/"). Hence the splitter argument. – Prahlad Yeri Aug 08 '12 at 10:41
  • At least use "\\" or @"\" then :-) – Jason Williams Aug 08 '12 at 11:04
  • Then I think you are mixing file paths with URIs and treating them both as strings. Consider using the `Uri` class for the ftp address, and adding this method as an extension method to it. And use plain `System.IO.Path.GetDirectoryName(path)` for file path tasks. – weston Aug 08 '12 at 11:13
  • 1
    At the time I had written my ftp program, I was not aware of the benifits of System.Uri class. Now, I feel that Uri is indeed the way to go since it takes away the burden of parsing. – Prahlad Yeri Aug 08 '12 at 11:39
  • @JasonWilliams - Indeed, when passing arguments to this function, I use the @"\", and not "\". – Prahlad Yeri Aug 08 '12 at 11:40
2

There is a Parent directory on FileInfo(System.IO namespace). Example code :

var file = new FileInfo(@"\ProgramFiles\MobileApp\es-gl\a.dll");
var parent = file.Directory.Parent;
Jonas W
  • 3,200
  • 1
  • 31
  • 44
0
var directory = Path.GetDirectoryName(@"c:\some\path\to\a\file.txt");
// returns "c:\some\path\to\a"

MSDN

Jason Williams
  • 56,972
  • 11
  • 108
  • 137
mdm
  • 12,480
  • 5
  • 34
  • 53
0

You can just use the methods of the string class.

        string path = @"\ProgramFiles\MobileApp\es-gl\a.dll";
        string newPath = path.Substring(0, path.LastIndexOf('\\'));
Icy Creature
  • 1,875
  • 2
  • 28
  • 53