workfile

public static string ConvertPathToUrl(string path)
    {
        string url;
        if (path.StartsWith("/"))
        {
            url = "file://" + path;
        }
        else if (path.StartsWith("file:///"))
        {
            url = path;
        }
        else
        {
            url = "file:///" + path;
        }
        return url.Replace("\\", "/");
    }