private async void DeleteButton_Click(object sender, RoutedEventArgs e)
{
// Dismiss the callout.
MyMapView.DismissCallout();
try
{
// Get the feature to delete from the layer.
Button deleteButton = (Button)sender;
Feature featureToDelete = (Feature)deleteButton.Tag;
// Delete the feature.
await _damageLayer.FeatureTable.DeleteFeatureAsync(featureToDelete);
// Sync the change with the service.
ServiceFeatureTable serviceTable = (ServiceFeatureTable)_damageLayer.FeatureTable;
await serviceTable.ApplyEditsAsync();
// Show a message confirming the deletion.
MessageBox.Show("Deleted feature with ID " + featureToDelete.Attributes["objectid"], "Success!");
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Couldn't delete feature");
}
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
// Clear any existing popups.
MyMapView.DismissCallout();
try
{
// Perform identify on the KML layer and get the results.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_forecastLayer, e.Position, 2, false);
// Return if there are no results that are KML placemarks.
if (!identifyResult.GeoElements.OfType <KmlGeoElement>().Any())
{
return;
}
// Get the first identified feature that is a KML placemark
KmlNode firstIdentifiedPlacemark = identifyResult.GeoElements.OfType <KmlGeoElement>().First().KmlNode;
// Show a page with the HTML content
await Navigation.PushAsync(new KmlIdentifyResultDisplayPage(firstIdentifiedPlacemark.BalloonContent));
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Error", ex.ToString(), "OK");
}
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.UI.Controls.GeoViewInputEventArgs e)
{
// Hide any existing callout.
MyMapView.DismissCallout();
// Perform the identify operation.
IdentifyLayerResult myIdentifyResult = await MyMapView.IdentifyLayerAsync(_wmsLayer, e.Position, 20, false);
// Return if there's nothing to show.
if (!myIdentifyResult.GeoElements.Any())
{
return;
}
// Retrieve the identified feature, which is always a WmsFeature for WMS layers.
WmsFeature identifiedFeature = (WmsFeature)myIdentifyResult.GeoElements[0];
// Retrieve the WmsFeature's HTML content.
string htmlContent = identifiedFeature.Attributes["HTML"].ToString();
// Note that the service returns a boilerplate HTML result if there is no feature found.
// This test should work for most arcGIS-based WMS services, but results may vary.
if (!htmlContent.Contains("OBJECTID"))
{
// Return without showing the callout.
return;
}
// Show a callout with the HTML content.
ShowHtmlCallout(htmlContent, e.Location);
}
/// <summary>
/// Shows a callout for any tapped graphics.
/// </summary>
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Search for the graphics underneath the user's tap.
IReadOnlyList <IdentifyGraphicsOverlayResult> results =
await MyMapView.IdentifyGraphicsOverlaysAsync(e.Position, 12, false);
// Clear callouts and return if there was no result.
if (results.Count < 1 || results.First().Graphics.Count < 1)
{
MyMapView.DismissCallout();
return;
}
// Get the first graphic from the first result.
Graphic matchingGraphic = results.First().Graphics.First();
// Get the title; manually added to the point's attributes in UpdateSearch.
string title = matchingGraphic.Attributes["Match_Title"].ToString();
// Get the address; manually added to the point's attributes in UpdateSearch.
string address = matchingGraphic.Attributes["Match_Address"].ToString();
// Define the callout.
CalloutDefinition calloutBody = new CalloutDefinition(title, address);
// Show the callout on the map at the tapped location.
MyMapView.ShowCalloutAt(e.Location, calloutBody);
}
private async void Map_Selected(object sender, EventArgs e)
{
// Clear existing overlays.
MyMapView.DismissCallout();
_waypointOverlay.Graphics.Clear();
_routeOverlay.Graphics.Clear();
try
{
ListView sendingList = (ListView)sender;
// Get the selected map.
Map selectedMap = sendingList.SelectedItem as Map;
// Show the map in the view.
MyMapView.Map = selectedMap;
// Get the transportation network if there is one. Will be set to null otherwise.
_networkDataset = selectedMap.TransportationNetworks.FirstOrDefault();
}
catch (Exception exception)
{
Debug.WriteLine(exception);
await Application.Current.MainPage.DisplayAlert("Error", e.ToString(), "OK");
}
}
/// <summary>
/// Method used to keep the suggestions up-to-date for the location box.
/// </summary>
private async void MyLocationBox_TextChanged(object sender, TextChangedEventArgs e)
{
// Don't update results immediately; makes search-as-you-type more comfortable
if (_waitFlag)
{
return;
}
_waitFlag = true;
await Task.Delay(150);
_waitFlag = false;
// Dismiss callout, if any.
MyMapView.DismissCallout();
// Get the current text.
string searchText = MyLocationBox.Text;
// Get the results.
List <string> results = await GetSuggestResults(searchText);
// Quit if there are no results.
if (!results.Any())
{
return;
}
// Add a 'current location' option to the list.
results.Insert(0, "Current Location");
// Update the list of options.
MyLocationBox.ItemsSource = results;
}
/// <summary>
/// Method used to keep the suggestions up-to-date for the search box.
/// </summary>
private async void MySearchBox_TextChanged(object sender, TextChangedEventArgs e)
{
// Don't update results immediately; makes search-as-you-type more comfortable
if (_waitFlag)
{
return;
}
_waitFlag = true;
await Task.Delay(150);
_waitFlag = false;
// Dismiss callout, if any.
MyMapView.DismissCallout();
// Get the current text.
string searchText = MySearchBox.Text;
// Get the current search location.
string locationText = MyLocationBox.Text;
// Convert the list into a usable format for the suggest box.
IEnumerable <string> results = await GetSuggestResults(searchText, locationText, true);
// Quit if there are no results.
if (results == null || !results.Any())
{
return;
}
// Update the list of options.
MySearchBox.ItemsSource = results;
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Clear any existing popups.
MyMapView.DismissCallout();
try
{
// Perform identify on the KML layer and get the results.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_forecastLayer, e.Position, 2, false);
// Return if there are no results that are KML placemarks.
if (!identifyResult.GeoElements.OfType <KmlGeoElement>().Any())
{
return;
}
// Get the first identified feature that is a KML placemark
KmlNode firstIdentifiedPlacemark = identifyResult.GeoElements.OfType <KmlGeoElement>().First().KmlNode;
// Create a browser to show the feature popup HTML.
WebView browser = new WebView
{
Width = 400,
Height = 100
};
browser.NavigateToString(firstIdentifiedPlacemark.BalloonContent);
// Create and show the callout.
MyMapView.ShowCalloutAt(e.Location, browser);
}
catch (Exception ex)
{
await new MessageDialog(ex.ToString(), "Error").ShowAsync();
}
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.UI.Controls.GeoViewInputEventArgs e)
{
//var CemLot = new Uri("http://apexgis:6080/arcgis/rest/services/CemeteryHost/CEMTESTSERV/FeatureServer/0");
// FeatureLayer LotLayer = new FeatureLayer(CemLot);
//await LotLayer.LoadAsync();
// NEED TO ACCESS LAYERS AND ADD TO OPERATION MAPPP!!!!!!!!!
// Perform the identify operation
MapPoint tapScreenPoint = e.Location;
var layer = MyMapView.Map.OperationalLayers[1];
var pixelTolerance = 10;
var returnPopupsOnly = false;
var maxResults = 200;
MyMapView.DismissCallout();
//IdentifyLayerResult myIdentifyResult = await MyMapView.IdentifyLayerAsync(layer, e.Position, pixelTolerance, returnPopupsOnly, maxResults);
IdentifyLayerResult myIdentifyResult = await MyMapView.IdentifyLayerAsync(layer, e.Position, pixelTolerance, returnPopupsOnly, maxResults);
//IReadOnlyList<IdentifyLayerResult> myIdentifyResult = await MyMapView.IdentifyLayersAsync(e.Position, pixelTolerance, returnPopupsOnly, maxResults);
// Return if there's nothing to show
if (myIdentifyResult.GeoElements.Count() < 1)
{
return;
}
FeatureLayer idLayer = myIdentifyResult.LayerContent as FeatureLayer;
// Retrieve the identified feature, which is always a WmsFeature for WMS layers
Feature idFeature = (Feature)myIdentifyResult.GeoElements[0];
//foreach (GeoElement idElement in myIdentifyResult.GeoElements)
// {
// cast the result GeoElement to Feature
// Feature idFeature = idElement as Feature;
try
{
string content = string.Format("{0} {1} {2} {3} {4}", idFeature.Attributes["name_FIRST"].ToString(), idFeature.Attributes["name_LAST"].ToString(), idFeature.Attributes["plot"].ToString(), idFeature.Attributes["lot"].ToString(), idFeature.Attributes["PLOT_ID"].ToString());
CalloutDefinition myCalloutDefinition = new CalloutDefinition("Plot Attributes", content);
MyMapView.ShowCalloutAt(tapScreenPoint, myCalloutDefinition);
}
catch
{
MessageBox.Show("Not an Identifeable Layer");
}
}
private void ClearAllSelections()
{
// For each layer in the operational layers that is an ENC layer
foreach (EncLayer layer in MyMapView.Map.OperationalLayers.OfType <EncLayer>())
{
// Clear the layer's selection
layer.ClearSelection();
}
// Clear the callout
MyMapView.DismissCallout();
}
private async void updateSearch()
{
// Get the text in the search bar.
string enteredText = MySearchBar.Text;
// Clear existing marker.
MyMapView.GraphicsOverlays[0].Graphics.Clear();
MyMapView.DismissCallout();
// Return if the textbox is empty or the geocoder isn't ready.
if (String.IsNullOrWhiteSpace(enteredText) || _geocoder == null)
{
return;
}
try
{
// Get suggestions based on the input text.
IReadOnlyList <GeocodeResult> geocodeResults = await _geocoder.GeocodeAsync(enteredText);
// Stop if there are no suggestions.
if (!geocodeResults.Any())
{
await Application.Current.MainPage.DisplayAlert("No results", "No results found.", "OK");
return;
}
// Get the full address for the first suggestion.
GeocodeResult firstSuggestion = geocodeResults.First();
IReadOnlyList <GeocodeResult> addresses = await _geocoder.GeocodeAsync(firstSuggestion.Label);
// Stop if the geocoder does not return a result.
if (addresses.Count < 1)
{
return;
}
// Show a graphic for the address.
Graphic point = await GraphicForPoint(addresses.First().DisplayLocation);
MyMapView.GraphicsOverlays[0].Graphics.Add(point);
// Update the map extent to show the marker.
MyMapView.SetViewpoint(new Viewpoint(addresses.First().Extent));
}
catch (Exception e)
{
await Application.Current.MainPage.DisplayAlert("Error", e.ToString(), "OK");
}
}
//===================更新MyScene视点位置============
private async void Map_Tapped(object sender, GeoViewInputEventArgs e)
{
// Dismiss any existing callouts.
MyMapView.DismissCallout();
// Get the normalized geometry for the tapped location and use it as the feature's geometry.
MapPoint tappedPoint = (MapPoint)GeometryEngine.NormalizeCentralMeridian(e.Location);
// Set the viewpoint with a new camera focused on the castle in Brest
observerCamera = new Camera(new MapPoint(Mlon(tappedPoint.X), Mlat(tappedPoint.Y), 100, SpatialReferences.Wgs84), heading, 74.1212, 0.0);
// MapPoint p = observerCamera.Location;
await MySceneView.SetViewpointCameraAsync(observerCamera);
}
/// <summary>
/// Method called to start an unrestricted search.
/// </summary>
private void MySearchButton_Click(object sender, RoutedEventArgs e)
{
// Dismiss callout, if any.
MyMapView.DismissCallout();
// Get the search text.
string searchText = MySearchBox.Text;
// Get the location text.
string locationText = MyLocationBox.Text;
// Run the search.
UpdateSearch(searchText, locationText);
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// 識別対象のレイヤーを取得
var layer = MyMapView.Map.OperationalLayers[0] as FeatureLayer;
// フィーチャのハイライトをクリア
layer.ClearSelection();
// コールアウトを非表示
MyMapView.DismissCallout();
// タップした地点のスクリーン ポイントを取得
Point tapScreenPoint = e.Position;
// タップした地点の許容範囲
var pixelTolerance = 1;
// ポップアップ オブジェクト作成の有無
var returnPopupsOnly = false;
// タップ地点に含まれるレイヤーを識別し、結果を取得
IdentifyLayerResult idLayerResults = await MyMapView.IdentifyLayerAsync(layer, tapScreenPoint, pixelTolerance, returnPopupsOnly);
if (idLayerResults.GeoElements.Count > 0)
{
// 選択したフィーチャをハイライト
Feature idFeature = idLayerResults.GeoElements[0] as Feature;
layer.SelectFeature(idFeature);
// コールアウトのコンテンツを作成
var layerName = layer.Name;
var attributes = new System.Text.StringBuilder();
if (idFeature.Attributes.Count > 0)
{
foreach (var attribute in idFeature.Attributes)
{
// フィーチャの属性（key:属性のフィールド名、value:属性のフィールド値のペア）を取得
var fieldName = attribute.Key;
var fieldValue = attribute.Value;
attributes.AppendLine(fieldName + ": " + fieldValue);
}
attributes.AppendLine();
}
// コールアウトのコンテンツを定義
CalloutDefinition myCalloutDefinition = new CalloutDefinition(layerName, attributes.ToString());
// コールアウトを表示
MyMapView.ShowCalloutAt(e.Location, myCalloutDefinition);
}
}
private async void MapTapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
try
{
// Get the result for where the user tapped on the raster layer.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_rasterLayer, e.Position, 1, false, 1);
// If no cell was identified, dismiss the callout.
if (!identifyResult.GeoElements.Any())
{
MyMapView.DismissCallout();
return;
}
// Create a StringBuilder to display information to the user.
var stringBuilder = new StringBuilder();
// Get the identified raster cell.
GeoElement cell = identifyResult.GeoElements.First();
// Loop through the attributes (key/value pairs).
foreach (KeyValuePair <string, object> keyValuePair in cell.Attributes)
{
// Add the key/value pair to the string builder.
stringBuilder.AppendLine($"{keyValuePair.Key}: {keyValuePair.Value}");
}
// Get the x and y values of the cell.
double x = cell.Geometry.Extent.XMin;
double y = cell.Geometry.Extent.YMin;
// Add the X & Y coordinates where the user clicked raster cell to the string builder.
stringBuilder.AppendLine($"X: {Math.Round(x, 4)}\nY: {Math.Round(y, 4)}");
// Create a callout using the string.
#if __IOS__
var definition = new CalloutDefinition(string.Empty, stringBuilder.ToString().Replace("\n", " "));
#else
var definition = new CalloutDefinition(string.Empty, stringBuilder.ToString());
#endif
// Display the call out in the map view.
MyMapView.ShowCalloutAt(e.Location, definition);
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert(ex.GetType().Name, ex.Message, "OK");
}
}
async void MyMapView_GeoViewTapped(System.Object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
// Clear any currently visible callouts, route graphics, or selections
MyMapView.DismissCallout();
_routeGraphicsOverlay.Graphics.Clear();
_placesGraphicsOverlay.ClearSelection();
// Get the place under the tap
IdentifyGraphicsOverlayResult idResult = await MyMapView.IdentifyGraphicsOverlayAsync(_placesGraphicsOverlay, e.Position, 12, false);
Graphic clickedElement = idResult.Graphics.FirstOrDefault();
if (clickedElement != null)
{
// Select the place to highlight it; get name and address
clickedElement.IsSelected = true;
string name = clickedElement.Attributes["Name"].ToString();
string address = clickedElement.Attributes["Address"].ToString();
// Create a callout definition that shows the name and address for the place; set the element as a tag
CalloutDefinition definition = new CalloutDefinition(name, address);
definition.Tag = clickedElement;
// Handle button clicks for the button on the callout
// This event receives the value assigned as the CalloutDefinition.Tag
// ** Fix API ref for this!
// https://developers.arcgis.com/net/latest/wpf/api-reference/html/P_Esri_ArcGISRuntime_UI_CalloutDefinition_OnButtonClick.htm
definition.OnButtonClick = new Action <object>(async(tag) =>
{
// Get the geoelement that represents the place
GeoElement poiElement = tag as GeoElement;
if (poiElement == null)
{
return;
}
// Call a function in the viewmodel that will route to this location
var routeGraphic = await _viewModel.RouteToPoiAsync(_deviceLocation, poiElement.Geometry as MapPoint, MyMapView.SpatialReference);
// Add the route graphic to the map view and zoom to its extent
_routeGraphicsOverlay.Graphics.Add(routeGraphic);
await MyMapView.SetViewpointGeometryAsync(routeGraphic.Geometry, 30);
});
// Set the button icon and show the callout at the click location
definition.ButtonImage = WalkIcon;
MyMapView.ShowCalloutAt(e.Location, definition);
}
}
private async void MouseMoved(object sender, PointerRoutedEventArgs e)
{
try
{
// Get the curent mouse position.
Point position = e.GetCurrentPoint(MyMapView).Position;
// Get the result for where the user hovered on the raster layer.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_rasterLayer, position, 1, false, 1);
// If no cell was identified, dismiss the callout.
if (!identifyResult.GeoElements.Any())
{
MyMapView.DismissCallout();
return;
}
// Create a StringBuilder to display information to the user.
var stringBuilder = new StringBuilder();
// Get the identified raster cell.
GeoElement cell = identifyResult.GeoElements.First();
// Loop through the attributes (key/value pairs).
foreach (KeyValuePair <string, object> keyValuePair in cell.Attributes)
{
// Add the key/value pair to the string builder.
stringBuilder.AppendLine($"{keyValuePair.Key}: {keyValuePair.Value}");
}
// Get the x and y values of the cell.
double x = cell.Geometry.Extent.XMin;
double y = cell.Geometry.Extent.YMin;
// Add the X & Y coordinates where the user clicked raster cell to the string builder.
stringBuilder.AppendLine($"X: {Math.Round(x, 4)}\nY: {Math.Round(y, 4)}");
// Create a callout using the string.
var definition = new CalloutDefinition(stringBuilder.ToString());
// Display the call out in the map view.
MyMapView.ShowCalloutAt(MyMapView.ScreenToLocation(position), definition);
}
catch (Exception ex)
{
await new MessageDialog(ex.Message, ex.GetType().Name).ShowAsync();
}
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
// Clear any existing popups.
MyMapView.DismissCallout();
try
{
// Perform identify on the KML layer and get the results.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_forecastLayer, e.Position, 2, false);
// Return if there are no results that are KML placemarks.
if (!identifyResult.GeoElements.OfType <KmlGeoElement>().Any())
{
return;
}
// Get the first identified feature that is a KML placemark.
KmlNode firstIdentifiedPlacemark = identifyResult.GeoElements.OfType <KmlGeoElement>().First().KmlNode;
// Populate the Description if empty.
if (string.IsNullOrEmpty(firstIdentifiedPlacemark.Description))
{
firstIdentifiedPlacemark.Description = "Weather condition";
}
// Create a browser to show the feature popup HTML.
WebView2 browser = new WebView2
{
Width = 400,
Height = 100
};
// Ensure the CoreWebView2 has been created.
await browser.EnsureCoreWebView2Async();
// Initiate the navigation to the BalloonContent HTML.
browser.NavigateToString(firstIdentifiedPlacemark.BalloonContent);
// Create and show the callout.
MyMapView.ShowCalloutAt(e.Location, browser);
}
catch (Exception ex)
{
await new MessageDialog2(ex.ToString(), "Error").ShowAsync();
}
}
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 MapView_Tapped(object sender, GeoViewInputEventArgs e)
{
// Clear any existing selection.
_damageLayer.ClearSelection();
// Dismiss any existing callouts.
MyMapView.DismissCallout();
try
{
// Perform an identify to determine if a user tapped on a feature.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_damageLayer, e.Position, 2, false);
// Do nothing if there are no results.
if (!identifyResult.GeoElements.Any())
{
return;
}
// Otherwise, get the ID of the first result.
long featureId = (long)identifyResult.GeoElements.First().Attributes["objectid"];
// Get the feature by constructing a query and running it.
QueryParameters qp = new QueryParameters();
qp.ObjectIds.Add(featureId);
FeatureQueryResult queryResult = await _damageLayer.FeatureTable.QueryFeaturesAsync(qp);
Feature tappedFeature = queryResult.First();
// Select the feature.
_damageLayer.SelectFeature(tappedFeature);
// Show the callout.
ShowDeletionCallout(tappedFeature);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "There was a problem.");
}
}
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();
}
}
private async void MapView_Tapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
{
// Clear any existing selection.
_damageLayer.ClearSelection();
// Dismiss any existing callouts.
MyMapView.DismissCallout();
// Reset the picker.
DamageTypePicker.IsEnabled = false;
DamageTypePicker.SelectedIndex = -1;
try
{
// Perform an identify to determine if a user tapped on a feature.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_damageLayer, e.Position, 8, false);
// Do nothing if there are no results.
if (!identifyResult.GeoElements.Any())
{
return;
}
// Get the tapped feature.
_selectedFeature = (ArcGISFeature)identifyResult.GeoElements.First();
// Select the feature.
_damageLayer.SelectFeature(_selectedFeature);
// Update the UI for the selection.
UpdateUiForSelectedFeature();
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Error selecting feature.", ex.ToString(), "OK");
}
}
private async void MapView_Tapped(object sender, GeoViewInputEventArgs e)
{
// Clear any existing selection.
_damageLayer.ClearSelection();
// Dismiss any existing callouts.
MyMapView.DismissCallout();
// Reset the dropdown.
DamageTypeDropDown.IsEnabled = false;
DamageTypeDropDown.SelectedIndex = -1;
try
{
// Perform an identify to determine if a user tapped on a feature.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_damageLayer, e.Position, 2, false);
// Do nothing if there are no results.
if (!identifyResult.GeoElements.Any())
{
return;
}
// Get the tapped feature.
_selectedFeature = (ArcGISFeature)identifyResult.GeoElements.First();
// Select the feature.
_damageLayer.SelectFeature(_selectedFeature);
// Update the UI for the selection.
UpdateUiForSelectedFeature();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "There was a problem.");
}
}
private void Map_Selected(object sender, SelectionChangedEventArgs e)
{
// Clear existing overlays.
MyMapView.DismissCallout();
_waypointOverlay.Graphics.Clear();
_routeOverlay.Graphics.Clear();
try
{
// Get the selected map.
Map selectedMap = e.AddedItems[0] as Map;
// Show the map in the view.
MyMapView.Map = selectedMap;
// Get the transportation network if there is one. Will be set to null otherwise.
_networkDataset = selectedMap.TransportationNetworks.FirstOrDefault();
}
catch (Exception exception)
{
Console.WriteLine(exception);
MessageBox.Show(exception.ToString());
}
}
/// <summary>
/// Method to handle hiding the callout, should be called by all UI event handlers
/// </summary>
private void UserInteracted()
{
// Hide the callout
MyMapView.DismissCallout();
}
private async void IdentifyCell(Point position)
{
// Check if a cell is already being identified
if (_isIdentifying)
{
_nextIdentifyAction = () => IdentifyCell(position);
return;
}
// Set variable to true to prevent concurrent identify calls.
_isIdentifying = true;
try
{
// Get the result for where the user hovered on the raster layer.
IdentifyLayerResult identifyResult = await MyMapView.IdentifyLayerAsync(_rasterLayer, position, 1, false, 1);
// If no cell was identified, dismiss the callout.
if (!identifyResult.GeoElements.Any())
{
MyMapView.DismissCallout();
return;
}
// Create a StringBuilder to display information to the user.
var stringBuilder = new StringBuilder();
// Get the identified raster cell.
GeoElement cell = identifyResult.GeoElements.First();
// Loop through the attributes (key/value pairs).
foreach (KeyValuePair <string, object> keyValuePair in cell.Attributes)
{
// Add the key/value pair to the string builder.
stringBuilder.AppendLine($"{keyValuePair.Key}: {keyValuePair.Value}");
}
// Get the x and y values of the cell.
double x = cell.Geometry.Extent.XMin;
double y = cell.Geometry.Extent.YMin;
// Add the X & Y coordinates where the user clicked raster cell to the string builder.
stringBuilder.AppendLine($"X: {Math.Round(x, 4)}\nY: {Math.Round(y, 4)}");
// Create a callout using the string.
var definition = new CalloutDefinition(stringBuilder.ToString());
// Display the call out in the map view.
MyMapView.ShowCalloutAt(MyMapView.ScreenToLocation(position), definition);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, ex.GetType().ToString());
}
finally
{
_isIdentifying = false;
}
// Check if there is a new position to identify.
if (_nextIdentifyAction != null)
{
Action action = _nextIdentifyAction;
// Clear the queued identify action.
_nextIdentifyAction = null;
// Run the next action.
action();
}
}
private async Task ProcessRouteRequest(MapPoint tappedPoint)
{
// Clear any existing overlays.
_routeOverlay.Graphics.Clear();
MyMapView.DismissCallout();
// Return if there is no network available for routing.
if (_networkDataset == null)
{
await ShowGeocodeResult(tappedPoint);
return;
}
// Set the start point if it hasn't been set.
if (_startPoint == null)
{
_startPoint = tappedPoint;
await ShowGeocodeResult(tappedPoint);
// Show the start point.
_waypointOverlay.Graphics.Add(await GraphicForPoint(_startPoint));
return;
}
if (_endPoint == null)
{
await ShowGeocodeResult(tappedPoint);
// Show the end point.
_endPoint = tappedPoint;
_waypointOverlay.Graphics.Add(await GraphicForPoint(_endPoint));
// Create the route task from the local network dataset.
RouteTask routingTask = await RouteTask.CreateAsync(_networkDataset);
// Configure route parameters for the route between the two tapped points.
RouteParameters routingParameters = await routingTask.CreateDefaultParametersAsync();
List <Stop> stops = new List <Stop> {
new Stop(_startPoint), new Stop(_endPoint)
};
routingParameters.SetStops(stops);
// Get the first route result.
RouteResult result = await routingTask.SolveRouteAsync(routingParameters);
Route firstRoute = result.Routes.First();
// Show the route on the map. Note that symbology for the graphics overlay is defined in Initialize().
Polyline routeLine = firstRoute.RouteGeometry;
_routeOverlay.Graphics.Add(new Graphic(routeLine));
return;
}
// Reset graphics and route.
_routeOverlay.Graphics.Clear();
_waypointOverlay.Graphics.Clear();
_startPoint = null;
_endPoint = null;
}
