/// <summary>
/// apply When execute function.
/// </summary>
/// <param name="args">The arguments.</param>
/// <param name="result">The result of the arguments.</param>
/// <returns></returns>
public string Execute(string[] args, out bool result)
{
result = true;
try
{
if (args == null || args.Length == 0)
{
throw new Exception("invalid args");
}
IDirectoryHandler handler = handlers[args[1]];
string message = model.CloseHandler(handler, out result);
} catch (Exception e) { result = false; }
return("ok");
}