/// <summary>
/// Update the UI based on the results of a Cloud Geocoding Query
/// </summary>
private void UpdateSearchResultsOnUI(CloudGeocodingResult searchResult)
{
// Clear the locations list and existing location markers on the map
SimpleMarkerOverlay geocodedLocationOverlay = (SimpleMarkerOverlay)mapView.Overlays["Geocoded Locations Overlay"];
geocodedLocationOverlay.Markers.Clear();
lsbLocations.ItemsSource = null;
geocodedLocationOverlay.Refresh();
// Update the UI with the number of results found and the list of locations found
txtSearchResultsDescription.Text = $"Found {searchResult.Locations.Count} matching locations.";
lsbLocations.ItemsSource = searchResult.Locations;
if (searchResult.Locations.Count > 0)
{
lsbLocations.IsVisible = true;
lsbLocations.SelectedItem = searchResult.Locations[0];
}
}
/// <summary>
/// Search for an address using the GeocodingCloudClient and update the UI
/// </summary>
private async void Search_Click(object sender, EventArgs e)
{
await CollapseExpander();
// Perform some simple validation on the input text boxes
if (await ValidateSearchParameters())
{
// Run the Cloud Geocoding query
CloudGeocodingResult searchResult = await PerformGeocodingQuery();
// Handle an error returned from the geocoding service
if (searchResult.Exception != null)
{
await DisplayAlert("Error", searchResult.Exception.Message, "OK");
return;
}
// Update the UI based on the results
UpdateSearchResultsOnUI(searchResult);
}
}
/// <summary>
/// Search for an address using the GeocodingCloudClient
/// </summary>
private async Task <CloudGeocodingResult> PerformGeocodingQuery()
{
// Show a loading graphic to let users know the request is running
loadingIndicator.IsRunning = true;
loadingLayout.IsVisible = true;
CloudGeocodingOptions options = new CloudGeocodingOptions();
// Set up the CloudGeocodingOptions object based on the parameters set in the UI
options.MaxResults = int.Parse(txtMaxResults.Text);
options.SearchMode = ((string)cboSearchType.SelectedItem) == "Fuzzy" ? CloudGeocodingSearchMode.FuzzyMatch : CloudGeocodingSearchMode.ExactMatch;
options.LocationType = (CloudGeocodingLocationType)Enum.Parse(typeof(CloudGeocodingLocationType), (string)cboLocationType.SelectedItem);
options.ResultProjectionInSrid = 3857;
// Run the geocode
string searchString = txtSearchString.Text.Trim();
CloudGeocodingResult searchResult = await geocodingCloudClient.SearchAsync(searchString, options);
// Hide the loading graphic
loadingIndicator.IsRunning = false;
loadingLayout.IsVisible = false;
return(searchResult);
}
