具有多个过滤器的 DirectoryInfo.GetFiles

Question

I am trying to get a list of FileInfo objects that satisfy multiple filters.

Every suggestion I have seen uses array of file names/paths instead of FileInfo:

var files = Directory.GetFiles(sLogPath, "*.*", SearchOption.TopDirectoryOnly)
            .Where(s => s.StartsWith("abc", StringComparison.CurrentCultureIgnoreCase) || s.StartsWith("def", StringComparison.CurrentCultureIgnoreCase));

What I am trying to get is:

DirectoryInfo di = new DirectoryInfo(sLogPath);
var files = di.GetFiles(<same filter as above>);

But it looks like I can only do something like:

var files = di.GetFiles("*_" + dateStr + ".log");
                

Answer 1

Based on your comment to me on your question, it looks like you want to filter on file names, but get the FileInfo s that correspond to these names.

You can do something like this

var di = new DirectoryInfo(sLogPath);

var files = di
    .GetFiles("*.*", SearchOption.TopDirectoryOnly)
    .Where(x => x.Name.StartsWith("abc", StringComparison.CurrentCultureIgnoreCase)
        || x.Name.StartsWith("def", StringComparison.CurrentCultureIgnoreCase))
    .ToList();

We're using the Name property in the filter and working with the FileInfo[] array returned by DirectoryInfo.GetFiles() .