GetFiles with multiple extensions [duplicate]

Question

Possible Duplicate:
Can you call Directory.GetFiles() with multiple filters?

How do you filter on more than one extension?

I've tried:

FileInfo[] Files = dinfo.GetFiles("*.jpg;*.tiff;*.bmp"); FileInfo[] Files = dinfo.GetFiles("*.jpg,*.tiff,*.bmp"); 

Answer 1

Why not create an extension method? That's more readable.

public static IEnumerable<FileInfo> GetFilesByExtensions(this DirectoryInfo dir, params string[] extensions) {     if (extensions == null)           throw new ArgumentNullException("extensions");     IEnumerable<FileInfo> files = Enumerable.Empty<FileInfo>();     foreach(string ext in extensions)     {        files = files.Concat(dir.GetFiles(ext));     }     return files; } 

EDIT: a more efficient version:

public static IEnumerable<FileInfo> GetFilesByExtensions(this DirectoryInfo dir, params string[] extensions) {     if (extensions == null)           throw new ArgumentNullException("extensions");     IEnumerable<FileInfo> files = dir.EnumerateFiles();     return files.Where(f => extensions.Contains(f.Extension)); } 

Usage:

DirectoryInfo dInfo = new DirectoryInfo(@"c:\MyDir"); dInfo.GetFilesByExtensions(".jpg",".exe",".gif");