public static bool Exists(string path)
{
if (string.IsNullOrEmpty(path))
{
return(false);
}
int error;
return(FileInternal.ExistsFile(path, out error));
}
private static string[] GetFileSystemEntries(string path, string pattern, FileAttributes mask, FileAttributes attrs)
{
if (path == null || pattern == null)
{
throw new ArgumentNullException();
}
if (pattern == String.Empty)
{
return new string[] { }
}
;
if (path.Trim() == "")
{
throw new ArgumentException("The Path does not have a valid format");
}
string wild = Path.Combine(path, pattern);
string wildpath = Path.GetDirectoryName(wild);
if (wildpath.IndexOfAny(Path.InvalidPathChars) != -1)
{
throw new ArgumentException("Path contains invalid characters");
}
if (wildpath.IndexOfAny(Path.InvalidPathChars) != -1)
{
if (path.IndexOfAny(SearchPattern.InvalidChars) == -1)
{
throw new ArgumentException("Path contains invalid characters", "path");
}
throw new ArgumentException("Pattern contains invalid characters", "pattern");
}
int error;
if (!FileInternal.ExistsDirectory(wildpath, out error))
{
if (error == FileInternal.Error_OK)
{
int file_error;
if (FileInternal.ExistsFile(wildpath, out file_error))
{
return(new string[] { wildpath });
}
}
if (error != FileInternal.ERROR_PATH_NOT_FOUND)
{
throw FileInternal.GetException(error, wildpath);
}
if (wildpath.IndexOfAny(SearchPattern.WildcardChars) == -1)
{
throw new DirectoryNotFoundException("Directory '" + wildpath + "' not found.");
}
if (path.IndexOfAny(SearchPattern.WildcardChars) == -1)
{
throw new ArgumentException("Pattern is invalid", "pattern");
}
throw new ArgumentException("Path is invalid", "path");
}
string path_with_pattern = Path.Combine(wildpath, pattern);
string[] result = FileInternal.GetFileSystemEntries(path, path_with_pattern, attrs, mask, out error);
if (error != 0)
{
throw FileInternal.GetException(error, wildpath);
}
return(result);
}
}