Question

Using LINQ I would like to retrieve all files under a given directory that are less/greater than a specified file size.

I have the following code that returns a List at present:

    public static List<string> getFs(string sDir)
    {
        var files = Directory.EnumerateFiles(sDir, "*.*", SearchOption.AllDirectories)
            .Where(s => s.ToLower().EndsWith(".psd"));

        return files.ToList();
    }

I found the following code courtesy of Monsieur Skeet that seems to access file size:

long diskSpace = (from directory in Directory.EnumerateDirectories(@"c:\")
              from file in Directory.EnumerateFiles(directory)
              select file)
             .Sum(file => new FileInfo(file).Length);

How would I adapt the file size aspect of this into my existing code or is this the wrong approach in the context of what I have already?

Answer 1

You just need to add an additional Where… As an example:

public static List<string> getFs(string sDir) 
{ 
    var files = Directory.EnumerateFiles(sDir, "*.*", SearchOption.AllDirectories) 
        .Where(s => s.ToLower().EndsWith(".psd"))
        .Where(s => new FileInfo(s).Length > 10000); 

    return files.ToList(); 
} 

Of course, you could also combine the two Where clauses; I kept them separate for clarity. This is equally valid:

    var files = Directory.EnumerateFiles(sDir, "*.*", SearchOption.AllDirectories) 
        .Where(s => s.ToLower().EndsWith(".psd") && new FileInfo(s).Length > 1000000);