private void ProcessSearch(string searchString)
        {
            int routeNumber = 0;

            bool canConvert = int.TryParse(searchString, out routeNumber); //check if it's a number

            if (canConvert == true)                                        //it's a route or stop number
            {
                int number = int.Parse(searchString);
                if (number < 1000) //route number
                {
                    viewModel.SearchByRoute(searchString, SearchByRouteCallback);
                }
                else //stop number
                {
                    viewModel.SearchByStop(searchString, SearchByStopCallback);
                }
            }
            else if (string.IsNullOrEmpty(searchString) == false) // Try to find the location
            {
                viewModel.SearchByAddress(searchString, SearchByLocationCallback);
            }

            SearchStoryboard.Seek(TimeSpan.Zero);
            SearchStoryboard.Stop();
            this.Focus();
        }