Directory.GetFiles get today's files only

Question

There is nice function in .NET Directory.GetFiles, it's simple to use it when I need to get all files from directory.

Directory.GetFiles("c:\\Files")

But how (what pattern) can I use to get only files that created time have today if there are a lot of files with different created time?

Thanks!

Answer 1

Try this:

var todayFiles = Directory.GetFiles("path_to_directory")
                 .Where(x => new FileInfo(x).CreationTime.Date == DateTime.Today.Date);

Answer 2

For performance, especially if the directory search is likely to be large, the use of Directory.EnumerateFiles(), which lazily enumerates over the search path, is preferable to Directory.GetFiles(), which eagerly enumerates over the search path, collecting all matches before filtering any:

DateTime today = DateTime.Now.Date ;
FileInfo[] todaysFiles = new DirectoryInfo(@"c:\foo\bar")
                         .EnumerateFiles()
                         .Select( x => {
                            x.Refresh();
                            return x;
                         })
                         .Where( x => x.CreationTime.Date == today || x.LastWriteTime == today )
                         .ToArray()
                         ;

Note that the the properties of FileSystemInfo and its subtypes can be (and are) cached, so they do not necessarily reflect current reality on the ground. Hence, the call to Refresh() to ensure the data is correct.