Exact file extension match with GetFiles()?

Question

I\'d like to retrieve a list of files whose extensions match a specified string exactly.

DirectoryInfo di = new DirectoryInfo(someValidPath);
List

        

Answer 1

Try this:

DirectoryInfo di = new DirectoryInfo(someValidPath); 
List<FileInfo> myFiles =  
    (
        from file in di.GetFiles("*.txt")
        where file.Extension == ".txt"
        select file
    ).ToList();

Answer 2

I had a user-supplied pattern so many of the other answers didn't suit me. I ended up with this more general purpose solution:

public string[] GetFiles(string path, string pattern)
{
    bool lastWildIsHook = false;
    if(pattern.EndsWith("?"))
    {
        pattern = pattern.Substring(0, pattern.Length - 1);
        lastWildIsHook = true;
    }
    var lastWildIndex = Math.Max(pattern.LastIndexOf("*"), pattern.LastIndexOf("?"));
    var endsWith = pattern.Length > lastWildIndex ? pattern.Substring(lastWildIndex + 1) : pattern;
    if(!lastWildIsHook)
        return Directory.GetFiles(path, pattern).Where(p => p.EndsWith(endsWith)).ToArray();
    else
        return Directory.GetFiles(path, pattern).Where(p => p.EndsWith(endsWith) || p.Substring(0, p.Length - 1).EndsWith(endsWith)).ToArray();
}