CODEWITHSUNDEEP
c#filesubdirectory
Matt Elhotiby
Matt Elhotiby

Reputation: 44066

How do i check if a file is within any folder and all its subfolders in C#?

I have this code

foreach (syncspec.Attribute attr in attributes)
{
      string fullPath = location + "\\" + attr.link;
      if (File.Exists(fullPath))
}

and i am checking a know location and an example fullpath is listed below 

// fullPath = "C:\\Users\\matt\\Desktop\\shard\\all/file30005"

What i want to do is look in the all folder and any subfolders within the all folder...any ideas on how to achieve this

Upvotes: 0

Views: 1029

Answers (5)

Tigran
Tigran

Reputation: 62246

First do not use simple concatenation on paths, but use Path.Combine:

string parentDirPath = Path.Combine(location , attr.link);

And second, for iterating over all sub-directories, can use

Directory.EnumerateDirectories

Example: 

foreach (var dir in  Directory.EnumerateDirectories(parentDirPath))
{
     //do something here
}

Upvotes: 1

Grant H.
Grant H.

Reputation: 3717

This solution is a bit heavier, but I use a variant of it because it allows you to catch any exceptions while searching and continue. GetFiles() will error out entirely if it encounters a directory that it does not have permissions to traverse.

Check this: Safe File Enumeration

Upvotes: 0

Brunner
Brunner

Reputation: 1965

You can either use GetFiles(..) as suggested by the others or use a recursive method like this (fully working solution btw):

bool FileExists(string path, string filename)
{
  string fullPath = Path.Combine(path, filename);
  return File.Exists(fullPath) && Directory.GetDirectories(path).All(x => FileExists(x, filename));
}

Upvotes: 1

Steve
Steve

Reputation: 216290

Your friend is 

DirectoryInfo.GetFiles("filename", SearchOption.AllDirectories);

as in this example:

DirectoryInfo info = new DirectoryInfo(location);
FileInfo[] results = info.GetFiles(attr.Link, SearchOption.AllDirectories);
foreach(FileInfo fi in results)
    ....

See the MSDN docs for reference

Upvotes: 1

roken
roken

Reputation: 3994

System.IO.Directory.GetFiles(location, attr.link, SearchOption.AllDirectories);

Read more on GetFiles via MSDN: http://msdn.microsoft.com/en-us/library/ms143316

Upvotes: 4

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