How to get relative path from absolute path

Question

There\'s a part in my apps that displays the file path loaded by the user through OpenFileDialog. It\'s taking up too much space to display the whole path, but I don\'t want

Answer 1

Play with something like:

private String GetRelativePath(Int32 level, String directory, out String errorMessage) {
        if (level < 0 || level > 5) {
            errorMessage = "Find some more smart input data";
            return String.Empty;
        }
        // ==========================
        while (level != 0) {
            directory = Path.GetDirectoryName(directory);
            level -= 1;
        }
        // ==========================
        errorMessage = String.Empty;
        return directory;
    }

And test it

[Test]
    public void RelativeDirectoryPathTest() {
        var relativePath =
            GetRelativePath(3, AppDomain.CurrentDomain.BaseDirectory, out var errorMessage);
        Console.WriteLine(relativePath);
        if (String.IsNullOrEmpty(errorMessage) == false) {
            Console.WriteLine(errorMessage);
            Assert.Fail("Can not find relative path");
        }
    }