/// <summary>
/// If the user did not manually select a station via the dialog or the dropdown of the
/// <see cref="ComboBox"/>, this method will check the content of the <see cref="ComboBox"/>
/// and load a station into the <see cref="ComboBox"/>, that is valid. The station is
/// only going to be loaded into the <see cref="ComboBox"/>, if there's only one result.
/// </summary>
/// <param name="combobox">The combobox to apply it for.</param>
/// <param name="continuation">The continuation to execute.</param>
/// <returns>The task to await.</returns>
private async Task CheckIfComboboxStationEmpty(ComboBox combobox, Action continuation)
{
if (combobox.SelectedItem == null && combobox.Text != string.Empty)
{
var searchText = combobox.Text;
var stationList = await Task.Run(() => this.actionHandler.HandleFunc(() =>
this.queryService.GetStations(searchText)));
if (stationList != null && stationList.StationList.Any())
{
if (stationList.StationList.Any(x => x.Name == searchText) ||
stationList.StationList.Count == 1)
{
// If there's only one result, create the view model and load it into the combo box
var viewModel = new ComboboxItemViewModel <TransportStation>(
stationList.StationList.FirstOrDefault(x => x.Name == searchText) ?? stationList.StationList.First(),
x => x.Name);
combobox.DataSource = new List <object> {
viewModel
};
combobox.SelectedItem = viewModel;
}
}
}
// Invoke the continuation on the UI thread
this.Invoke(continuation);
}
/// <summary>
/// Gets the closest station view model to the current location.
/// </summary>
/// <returns>Returns the view model for the curent location <see cref="TransportStation"/>.</returns>
private async Task <ComboboxItemViewModel <TransportStation> > GetCurrentLocationComboboxViewModel()
{
var closeLocation = await Task.Run(() => this.actionHandler.HandleFunc(
() => this.locatableStationService.GetClosestStation(),
exception => { }));
if (closeLocation != null)
{
var viewModel = new ComboboxItemViewModel <TransportStation>(closeLocation, x => $"Aktueller Standort: {x.Name}");
return(viewModel);
}
return(null);
}
