Question

I need some help using LINQ to filer a list of files based on the file size. I have some code but it’s using file.length instead of FileInfo(file).length. I don’t know how to implement an object ‘FileInfo’ in the expression. HELP?

        {            
            IEnumerable<string> result = "*.ini,*.log,*.txt"
            .SelectMany(x => Directory.GetFiles("c:\logs", x, SearchOption.TopDirectoryOnly))
                            ;

            result = result
                .Where(x => (x.Length) > "500000")

               ;

       }

Answer 1

You should be able to do something like this.

Using a DirectoryInfo, the GetFiles will return a collection of FileInfo instead of strings.

new DirectoryInfo(@"c:\logs")
    .GetFiles("*.ini,*.log,*.txt", SearchOption.TopDirectoryOnly)
    .Where(f => f.Length > 500000);

Of course you would always create FileInfo inline if you wanted to.

If you just wanted the filenames back..

IEnumerable<string> results = new DirectoryInfo(@"c:\logs")
    .GetFiles("*.ini,*.log,*.txt", SearchOption.TopDirectoryOnly)
    .Where(f => f.Length > 500000)
    .Select(f => f.FullName);