catch invalid file paths

I h开发者_如何学运维ave a function that reads a bunch of path-values (8 or 9 of them) from a text file. It uses these paths later in the application to read files. Whats the best way to check for validity of these file-paths. Can I do a single catch of some sorts?

System.IO.Directory.Exists(string path) System.IO.File.Exists(string path)

I would just use File.Exists in a loop, pretty simple and readable. Is there a trendier way? Probably.

You can use File.Exists and/or Directory.Exists is a path can be a directory.

static void Main(string[] args)
{
    List<string> paths = new List<string>{"C:\\path1.txt", "c:\\path2.txt"};
    bool allValid = paths.All(path=>File.Exists(path));
}

Maybe regex could be an option for you, at least in a windows environment. This avoids making a disk access, as File.Exists would. Source: http://www.csharp411.com/check-valid-file-path-in-c/

public bool IsValidPath(string path)
{
  Regex r = new Regex( @"^(([a-zA-Z]\:)|(\\))(\\{1}|((\\{1})[^\\]([^/:*?<>""|]*))+)$" );
  return r.IsMatch( path );
}

Consider using the System.IO.Path.GetFullPath method. Like most of the members of the Path class, it validates the path you pass in and throws an ArgumentException if the path is invalid.