private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
try
{
// Clear existing callout and graphics.
MyMapView.DismissCallout();
MyMapView.GraphicsOverlays[0].Graphics.Clear();
// Add a graphic for the tapped point.
Graphic pinGraphic = await GraphicForPoint(e.Location);
MyMapView.GraphicsOverlays[0].Graphics.Add(pinGraphic);
// Reverse geocode to get addresses.
ReverseGeocodeParameters parameters = new ReverseGeocodeParameters();
parameters.ResultAttributeNames.Add("*");
parameters.MaxResults = 1;
IReadOnlyList <GeocodeResult> addresses = await _geocoder.ReverseGeocodeAsync(e.Location, parameters);
// Skip if there are no results.
if (!addresses.Any())
{
await Application.Current.MainPage.DisplayAlert("No results", "No results found.", "OK");
return;
}
// Get the first result.
GeocodeResult address = addresses.First();
// Use the address as the callout title.
string calloutTitle = address.Attributes["Street"].ToString();
string calloutDetail = address.Attributes["City"] + ", " + address.Attributes["State"] + " " + address.Attributes["ZIP"];
// Define the callout.
CalloutDefinition calloutBody = new CalloutDefinition(calloutTitle, calloutDetail);
// Show the callout on the map at the tapped location.
MyMapView.ShowCalloutForGeoElement(pinGraphic, e.Position, calloutBody);
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Error", ex.ToString(), "OK");
}
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
try
{
// Clear the existing graphics & callouts.
MyMapView.DismissCallout();
MyMapView.GraphicsOverlays[0].Graphics.Clear();
// Add a graphic for the tapped point.
Graphic pinGraphic = await GraphicForPoint(e.Location);
MyMapView.GraphicsOverlays[0].Graphics.Add(pinGraphic);
// Normalize the geometry - needed if the user crosses the international date line.
MapPoint normalizedPoint = (MapPoint)GeometryEngine.NormalizeCentralMeridian(e.Location);
// Reverse geocode to get addresses.
IReadOnlyList <GeocodeResult> addresses = await _geocoder.ReverseGeocodeAsync(normalizedPoint);
// Get the first result.
GeocodeResult address = addresses.First();
// Use the city and region for the Callout Title.
string calloutTitle = address.Attributes["Address"].ToString();
// Use the metro area for the Callout Detail.
string calloutDetail = address.Attributes["City"] +
" " + address.Attributes["Region"] +
" " + address.Attributes["CountryCode"];
// Define the callout.
CalloutDefinition calloutBody = new CalloutDefinition(calloutTitle, calloutDetail);
// Show the callout on the map at the tapped location.
MyMapView.ShowCalloutForGeoElement(pinGraphic, e.Position, calloutBody);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
await new MessageDialog("No results found.", "No results").ShowAsync();
}
}
private async void MyMapView_MouseMove(object sender, MouseEventArgs e)// GeoViewInputEventArgs e)
{
// Get the screen point
var point = e.GetPosition(MyMapView); //e.Position;
// Add a graphic to show screen point location
//var mapPoint = MyMapView.ScreenToLocation(point);
//MyMapView.GraphicsOverlays[0].Graphics.Add(new Graphic(mapPoint));
// Use hit test to find feature
var results = await MyMapView.IdentifyLayerAsync(MyMapView.Map.OperationalLayers[0], point, 0, false);
// Show feature in callout
if (results != null && results.GeoElements?.Count > 0)
{
var feature = results.GeoElements.FirstOrDefault();
MyMapView.ShowCalloutForGeoElement(feature, point, new CalloutDefinition("City: " + feature.Attributes["AREANAME"]));
}
else
{
MyMapView.DismissCallout();
}
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
try
{
// Clear existing callout and graphics.
MyMapView.DismissCallout();
MyMapView.GraphicsOverlays[0].Graphics.Clear();
// Add a graphic for the tapped point.
Graphic pinGraphic = await GraphicForPoint(e.Location);
MyMapView.GraphicsOverlays[0].Graphics.Add(pinGraphic);
// Reverse geocode to get addresses.
ReverseGeocodeParameters parameters = new ReverseGeocodeParameters();
parameters.ResultAttributeNames.Add("*");
parameters.MaxResults = 1;
IReadOnlyList <GeocodeResult> addresses = await _geocoder.ReverseGeocodeAsync(e.Location, parameters);
// Get the first result.
GeocodeResult address = addresses.First();
// Use the address as the callout title.
string calloutTitle = address.Attributes["Street"].ToString();
string calloutDetail = address.Attributes["City"] + ", " + address.Attributes["State"] + " " + address.Attributes["ZIP"];
// Define the callout.
CalloutDefinition calloutBody = new CalloutDefinition(calloutTitle, calloutDetail);
// Show the callout on the map at the tapped location.
MyMapView.ShowCalloutForGeoElement(pinGraphic, e.Position, calloutBody);
}
catch (Exception ex)
{
await new MessageDialog2(ex.ToString(), "Error").ShowAsync();
}
}
