private async void EditButtonClick(object sender, RoutedEventArgs e)
{
try
{
// Set the focus to the map view(close the flyout panel)
DrawToolsFlyout.Hide();
// Allow the user to select a graphic
Graphic editGraphic = await GetGraphicAsync();
if (editGraphic == null)
{
return;
}
// Let the user make changes to the graphic's geometry, await the result (updated geometry)
Geometry newGeometry = await MyMapView.SketchEditor.StartAsync(editGraphic.Geometry);
// Display the updated geometry in the graphic
editGraphic.Geometry = newGeometry;
}
catch (TaskCanceledException)
{
// Ignore ... let the user cancel editing
}
catch (Exception ex)
{
// Report exceptions
var dialog = new MessageDialog2("Error editing shape: " + ex.Message);
await dialog.ShowAsync();
}
}
// Search the IWA-secured portal for web maps and display the results in a list.
private async void SearchSecureMapsButtonClick(object sender, RoutedEventArgs e)
{
try
{
// Get the value entered for the secure portal URL.
string securedPortalUrl = SecurePortalUrlTextBox.Text.Trim();
// Make sure a portal URL has been entered in the text box.
if (string.IsNullOrEmpty(securedPortalUrl))
{
var dialog = new MessageDialog2("Please enter the URL of the secured portal.", "Missing URL");
await dialog.ShowAsync();
return;
}
// Create an instance of the IWA-secured portal, the user may be challenged for access.
_iwaSecuredPortal = await ArcGISPortal.CreateAsync(new Uri(securedPortalUrl));
// Call a function to search the portal.
SearchPortal(_iwaSecuredPortal);
// Set a variable that indicates this is the secure portal.
// When a map is loaded from the results, will need to know which portal it came from.
_usingPublicPortal = false;
}
catch (Exception ex)
{
// Report errors (connecting to the secured portal, for example).
MessagesTextBlock.Text = ex.Message;
}
}
private async Task ConfigureOfflineJobForBasemap(GenerateOfflineMapParameters parameters)
{
// Don't give the user a choice if there is no basemap specified.
if (String.IsNullOrWhiteSpace(parameters.ReferenceBasemapFilename))
{
return;
}
// Get the path to the basemap directory.
string basemapBasePath = DataManager.GetDataFolder("85282f2aaa2844d8935cdb8722e22a93");
// Get the full path to the basemap by combining the name specified in the web map (ReferenceBasemapFilename)
// with the offline basemap directory.
string basemapFullPath = Path.Combine(basemapBasePath, parameters.ReferenceBasemapFilename);
// If the offline basemap doesn't exist, proceed without it.
if (!File.Exists(basemapFullPath))
{
return;
}
// Create a dialog for getting the user's basemap choice.
var dialog = new MessageDialog2("Use the offline basemap?", "Basemap choice");
// If the user selects OK, parameters.ReferenceBasemapDirectory will be set.
dialog.Commands.Add(new UICommand("Yes", command => parameters.ReferenceBasemapDirectory = basemapBasePath));
// Do nothing otherwise.
dialog.Commands.Add(new UICommand("No"));
// Wait for the user to choose.
await dialog.ShowAsync();
}
private async void DrawButtonClick(object sender, RoutedEventArgs e)
{
try
{
// Set the focus to the map view(close the flyout panel)
DrawToolsFlyout.Hide();
// Let the user draw on the map view using the chosen sketch mode
SketchCreationMode creationMode = Enum.Parse <SketchCreationMode>(SketchModeComboBox.SelectedItem as string);
Esri.ArcGISRuntime.Geometry.Geometry geometry = await MyMapView.SketchEditor.StartAsync(creationMode, true);
// Create and add a graphic from the geometry the user drew
Graphic graphic = CreateGraphic(geometry);
_sketchOverlay.Graphics.Add(graphic);
// Enable/disable the clear and edit buttons according to whether or not graphics exist in the overlay
ClearButton.IsEnabled = _sketchOverlay.Graphics.Count > 0;
EditButton.IsEnabled = _sketchOverlay.Graphics.Count > 0;
}
catch (TaskCanceledException)
{
// Ignore ... let the user cancel drawing
}
catch (Exception ex)
{
// Report exceptions
var dialog = new MessageDialog2("Error drawing graphic shape: " + ex.Message);
await dialog.ShowAsync();
}
}
private async void OpenFeaturesFromArcGISOnline(string itemId)
{
try
{
// Open a portal item containing a feature collection.
ArcGISPortal portal = await ArcGISPortal.CreateAsync();
PortalItem collectionItem = await PortalItem.CreateAsync(portal, itemId);
// Verify that the item is a feature collection.
if (collectionItem.Type == PortalItemType.FeatureCollection)
{
// Create a new FeatureCollection from the item.
FeatureCollection featureCollection = new FeatureCollection(collectionItem);
// Create a layer to display the collection and add it to the map as an operational layer.
FeatureCollectionLayer featureCollectionLayer = new FeatureCollectionLayer(featureCollection)
{
Name = collectionItem.Title
};
MyMapView.Map.OperationalLayers.Add(featureCollectionLayer);
}
else
{
var messageDlg = new MessageDialog2("Portal item with ID '" + itemId + "' is not a feature collection.", "Feature Collection");
await messageDlg.ShowAsync();
}
}
catch (Exception ex)
{
var messageDlg = new MessageDialog2("Unable to open item with ID '" + itemId + "': " + ex.Message, "Error");
await messageDlg.ShowAsync();
}
}
private async void Initialize()
{
// Create a map and add it to the view
MyMapView.Map = new Map(Basemap.CreateLightGrayCanvas());
try
{
// LocalServer must not be running when setting the data path.
if (LocalServer.Instance.Status == LocalServerStatus.Started)
{
await LocalServer.Instance.StopAsync();
}
// Set the local data path - must be done before starting. On most systems, this will be C:\EsriSamples\AppData.
// This path should be kept short to avoid Windows path length limitations.
string tempDataPathRoot = Directory.GetParent(Environment.GetFolderPath(Environment.SpecialFolder.Windows)).FullName;
string tempDataPath = Path.Combine(tempDataPathRoot, "EsriSamples", "AppData");
Directory.CreateDirectory(tempDataPath); // CreateDirectory won't overwrite if it already exists.
LocalServer.Instance.AppDataPath = tempDataPath;
// Start the local server instance
await LocalServer.Instance.StartAsync();
// Get the path to the map package that will be served
string datapath = GetDataPath();
// Create the Map Service from the data
_localMapService = new LocalMapService(datapath);
// Start the feature service
await _localMapService.StartAsync();
// Get the url to the map service
Uri myServiceUri = _localMapService.Url;
// Create the layer from the url
ArcGISMapImageLayer myImageLayer = new ArcGISMapImageLayer(myServiceUri);
// Add the layer to the map
MyMapView.Map.OperationalLayers.Add(myImageLayer);
// Wait for the layer to load
await myImageLayer.LoadAsync();
// Set the viewpoint on the map to show the data
MyMapView.SetViewpoint(new Viewpoint(myImageLayer.FullExtent));
}
catch (Exception ex)
{
var localServerTypeInfo = typeof(LocalMapService).GetTypeInfo();
var localServerVersion = FileVersionInfo.GetVersionInfo(localServerTypeInfo.Assembly.Location);
var dlg = new MessageDialog2($"Please ensure that local server {localServerVersion.FileVersion} is installed prior to using the sample. The download link is in the description. Message: {ex.Message}", "Local Server failed to start");
_ = dlg.ShowAsync();
}
}
private async void LoadWMTSLayer(bool uriMode)
{
try
{
// Create a new map.
Map myMap = new Map();
// Get the basemap from the map.
Basemap myBasemap = myMap.Basemap;
// Get the layer collection for the base layers.
LayerCollection myLayerCollection = myBasemap.BaseLayers;
// Create an instance for the WMTS layer.
WmtsLayer myWmtsLayer;
// Define the Uri to the WMTS service.
Uri wmtsUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/WorldTimeZones/MapServer/WMTS");
if (uriMode)
{
// Create a WMTS layer using a Uri and provide an Id value.
myWmtsLayer = new WmtsLayer(wmtsUri, "WorldTimeZones");
}
else
{
// Define a new instance of the WMTS service.
WmtsService myWmtsService = new WmtsService(wmtsUri);
// Load the WMTS service.
await myWmtsService.LoadAsync();
// Get the service information (i.e. metadata) about the WMTS service.
WmtsServiceInfo myWmtsServiceInfo = myWmtsService.ServiceInfo;
// Obtain the read only list of WMTS layer info objects.
IReadOnlyList <WmtsLayerInfo> myWmtsLayerInfos = myWmtsServiceInfo.LayerInfos;
// Create a WMTS layer using the first item in the read only list of WMTS layer info objects.
myWmtsLayer = new WmtsLayer(myWmtsLayerInfos[0]);
}
// Add the WMTS layer to the layer collection of the map.
myLayerCollection.Add(myWmtsLayer);
// Assign the map to the MapView.
MyMapView.Map = myMap;
}
catch (Exception ex)
{
var messageDlg = new MessageDialog2(ex.ToString(), "Error");
await messageDlg.ShowAsync();
}
}
private async void ConvexHullListButton_Click(object sender, RoutedEventArgs e)
{
try
{
// Get the boolean value whether to create a single convex hull (true) or independent convex hulls (false).
bool unionBool = (bool)ConvexHullListCheckBox.IsChecked;
// Add the geometries of the two polygon graphics to a list of geometries. It will be used as the 1st
// input parameter of the GeometryEngine.ConvexHull function.
List <Geometry> inputListOfGeomtries = new List <Geometry>
{
_polygonGraphic1.Geometry,
_polygonGraphic2.Geometry
};
// Get the returned result from the convex hull operation. When unionBool = true there will be one returned
// polygon, when unionBool = false there will be one convex hull returned per input geometry.
IEnumerable <Geometry> convexHullGeometries = GeometryEngine.ConvexHull(inputListOfGeomtries, unionBool);
// Loop through the returned geometries.
foreach (Geometry oneGeometry in convexHullGeometries)
{
// Create a simple line symbol for the outline of the convex hull graphic(s).
SimpleLineSymbol convexHullSimpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Red, 10);
// Create the simple fill symbol for the convex hull graphic(s) - comprised of a fill style, fill
// color and outline. It will be a hollow (i.e.. see-through) polygon graphic with a thick red outline.
SimpleFillSymbol convexHullSimpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Null, Color.Red,
convexHullSimpleLineSymbol);
// Create the graphic for the convex hull(s) - comprised of a polygon shape and fill symbol.
Graphic convexHullGraphic = new Graphic(oneGeometry, convexHullSimpleFillSymbol)
{
// Set the Z index for the convex hull graphic(s) so that they appear below the initial input graphics
// added earlier (polygon1 and polygon2).
ZIndex = 0
};
// Add the convex hull graphic to the graphics overlay collection.
_graphicsOverlay.Graphics.Add(convexHullGraphic);
}
// Disable the button after has been used.
ConvexHullListCheckBox.IsEnabled = false;
ConvexHullListButton.IsEnabled = false;
}
catch (Exception ex)
{
// Display an error message if there is a problem generating convex hull operation.
var theMessageDialog = new MessageDialog2("Geometry Engine Failed: " + ex.Message);
await theMessageDialog.ShowAsync();
}
}
private async Task QueryStateFeature(string stateName)
{
try
{
// Create a query parameters that will be used to Query the feature table
QueryParameters queryParams = new QueryParameters();
// Trim whitespace on the state name to prevent broken queries
string formattedStateName = stateName.Trim().ToUpper();
// Construct and assign the where clause that will be used to query the feature table
queryParams.WhereClause = "upper(STATE_NAME) LIKE '%" + formattedStateName + "%'";
// Query the feature table
FeatureQueryResult queryResult = await _featureTable.QueryFeaturesAsync(queryParams);
// Cast the QueryResult to a List so the results can be interrogated
List <Feature> features = queryResult.ToList();
if (features.Any())
{
// Create an envelope.
EnvelopeBuilder envBuilder = new EnvelopeBuilder(SpatialReferences.WebMercator);
foreach (Feature feature in features)
{
// Add the extent of each matching feature to the envelope.
envBuilder.UnionOf(feature.Geometry.Extent);
// Select each feature.
_featureLayer.SelectFeature(feature);
}
// Zoom to the extent of the selected feature(s).
await MyMapView.SetViewpointGeometryAsync(envBuilder.ToGeometry(), 50);
}
else
{
var message = new MessageDialog2("State Not Found!", "Add a valid state name.");
await message.ShowAsync();
}
}
catch (Exception ex)
{
var message = new MessageDialog2("Sample error: " + ex, "An error occurred");
await message.ShowAsync();
}
}
private async Task <IFeatureSet> GetGeodatabaseVersionsAsync()
{
// Results will be returned as a feature set
IFeatureSet results = null;
// Create new geoprocessing task
GeoprocessingTask listVersionsTask = await GeoprocessingTask.CreateAsync(new Uri(ListVersionsUrl));
// Create default parameters that are passed to the geoprocessing task
GeoprocessingParameters listVersionsParameters = await listVersionsTask.CreateDefaultParametersAsync();
// Create job that handles the communication between the application and the geoprocessing task
GeoprocessingJob listVersionsJob = listVersionsTask.CreateJob(listVersionsParameters);
try
{
// Execute analysis and wait for the results
GeoprocessingResult analysisResult = await listVersionsJob.GetResultAsync();
// Get results from the outputs
GeoprocessingFeatures listVersionsResults = (GeoprocessingFeatures)analysisResult.Outputs["Versions"];
// Set results
results = listVersionsResults.Features;
}
catch (Exception ex)
{
// Error handling if something goes wrong
if (listVersionsJob.Status == JobStatus.Failed && listVersionsJob.Error != null)
{
var message = new MessageDialog2("Executing geoprocessing failed. " + listVersionsJob.Error.Message, "Geoprocessing error");
await message.ShowAsync();
}
else
{
var message = new MessageDialog2("An error occurred. " + ex.ToString(), "Sample error");
await message.ShowAsync();
}
}
finally
{
// Set the UI to indicate that the geoprocessing is not running
SetBusy(false);
}
return(results);
}
private async void ConvexHullButton_Click(object sender, RoutedEventArgs e)
{
try
{
// Create a multi-point geometry from the user tapped input map points.
Multipoint inputMultipoint = new Multipoint(_inputPointCollection);
// Get the returned result from the convex hull operation.
Geometry convexHullGeometry = GeometryEngine.ConvexHull(inputMultipoint);
// Create a simple line symbol for the outline of the convex hull graphic(s).
SimpleLineSymbol convexHullSimpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Blue, 4);
// Create the simple fill symbol for the convex hull graphic(s) - comprised of a fill style, fill
// color and outline. It will be a hollow (i.e.. see-through) polygon graphic with a thick red outline.
SimpleFillSymbol convexHullSimpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Null, Color.Red,
convexHullSimpleLineSymbol);
// Create the graphic for the convex hull - comprised of a polygon shape and fill symbol.
Graphic convexHullGraphic = new Graphic(convexHullGeometry, new Dictionary <string, object>()
{
{ "Type", "Hull" }
}, convexHullSimpleFillSymbol)
{
ZIndex = 1
};
// Remove any existing convex hull graphics from the overlay.
foreach (Graphic g in new List <Graphic>(_graphicsOverlay.Graphics))
{
if ((string)g.Attributes["Type"] == "Hull")
{
_graphicsOverlay.Graphics.Remove(g);
}
}
// Add the convex hull graphic to the graphics overlay.
_graphicsOverlay.Graphics.Add(convexHullGraphic);
// Disable the button after has been used.
ConvexHullButton.IsEnabled = false;
}
catch (System.Exception ex)
{
// Display an error message if there is a problem generating convex hull operation.
var theMessageDialog = new MessageDialog2("Geometry Engine Failed: " + ex.Message);
await theMessageDialog.ShowAsync();
}
}
private async void MyMapView_GeoViewTapped(object sender, GeoViewInputEventArgs e)
{
try
{
// Get the input map point (in the map's coordinate system, State Plane for North Central Texas).
MapPoint tapMapPoint = e.Location;
// Check if the point coordinates are within the spatial reference envelope.
bool withinValidExent = GeometryEngine.Contains(_spatialReferenceArea, tapMapPoint);
// If the input point is not within the valid extent for the spatial reference, warn the user and return.
if (!withinValidExent)
{
var dialog = new MessageDialog2("Location is not valid to buffer using the defined spatial reference.", "Out of bounds");
await dialog.ShowAsync();
return;
}
// Get the buffer radius (in miles) from the text box.
double bufferDistanceMiles = Convert.ToDouble(BufferDistanceMilesTextBox.Text);
// Use a helper method to get the buffer distance in feet (unit that's used by the spatial reference).
double bufferDistanceFeet = LinearUnits.Miles.ConvertTo(LinearUnits.Feet, bufferDistanceMiles);
// Create a simple marker symbol (red circle) to display where the user tapped/clicked on the map.
SimpleMarkerSymbol tapSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.Red, 10);
// Create a new graphic to show the tap location.
Graphic tapGraphic = new Graphic(tapMapPoint, tapSymbol)
{
// Specify a z-index value on the point graphic to make sure it draws on top of the buffer polygons.
ZIndex = 2
};
// Store the specified buffer distance as an attribute with the graphic.
tapGraphic.Attributes["distance"] = bufferDistanceFeet;
// Add the tap point graphic to the buffer graphics overlay.
MyMapView.GraphicsOverlays["buffers"].Graphics.Add(tapGraphic);
}
catch (Exception ex)
{
// Display an error message.
await new MessageDialog2(ex.Message, "Error creating buffer point").ShowAsync();
}
}
private async void Open_Click(object sender, RoutedEventArgs e)
{
// Get the portal item Id from the user.
string collectionItemId = CollectionItemIdTextBox.Text.Trim();
// Make sure an Id was entered.
if (String.IsNullOrEmpty(collectionItemId))
{
var messageDlg = new MessageDialog2("Please enter a portal item ID", "Feature Collection ID");
await messageDlg.ShowAsync();
return;
}
// Call a function to add the feature collection from the specified portal item.
OpenFeaturesFromArcGISOnline(collectionItemId);
}
private async void MyMapView_GeoViewTapped(object sender, Esri.ArcGISRuntime.UI.Controls.GeoViewInputEventArgs e)
{
try
{
// Normalize the tapped point.
var centralizedPoint = (MapPoint)GeometryEngine.NormalizeCentralMeridian(e.Location);
// Add the map point to the list that will be used by the GeometryEngine.ConvexHull operation.
_inputPointCollection.Add(centralizedPoint);
// Check if there are at least three points.
if (_inputPointCollection.Count > 2)
{
// Enable the button for creating hulls.
ConvexHullButton.IsEnabled = true;
}
// Create a simple marker symbol to display where the user tapped/clicked on the map. The marker symbol
// will be a solid, red circle.
SimpleMarkerSymbol userTappedSimpleMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.Red, 10);
// Create a new graphic for the spot where the user clicked on the map using the simple marker symbol.
Graphic userTappedGraphic = new Graphic(e.Location, new Dictionary <string, object>
{
{ "Type", "Point" }
}, userTappedSimpleMarkerSymbol)
{
ZIndex = 0
};
// Set the Z index for the user tapped graphic so that it appears above the convex hull graphic(s) added later.
userTappedGraphic.ZIndex = 1;
// Add the user tapped/clicked map point graphic to the graphic overlay.
_graphicsOverlay.Graphics.Add(userTappedGraphic);
}
catch (System.Exception ex)
{
// Display an error message if there is a problem adding user tapped graphics.
var theMessageDialog = new MessageDialog2("Can't add user tapped graphic!" + ex.Message);
await theMessageDialog.ShowAsync();
}
}
private async void CutButton_Click(object sender, RoutedEventArgs e)
{
try
{
// Cut the polygon geometry with the polyline, expect two geometries.
Geometry[] cutGeometries = GeometryEngine.Cut(_lakeSuperiorPolygonGraphic.Geometry, (Polyline)_countryBorderPolylineGraphic.Geometry);
// Create a simple line symbol for the outline of the Canada side of Lake Superior.
SimpleLineSymbol canadaSideSimpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Null, System.Drawing.Color.Blue, 0);
// Create the simple fill symbol for the Canada side of Lake Superior graphic - comprised of a fill style, fill color and outline.
SimpleFillSymbol canadaSideSimpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.ForwardDiagonal, System.Drawing.Color.Green, canadaSideSimpleLineSymbol);
// Create the graphic for the Canada side of Lake Superior - comprised of a polygon shape and fill symbol.
Graphic canadaSideGraphic = new Graphic(cutGeometries[0], canadaSideSimpleFillSymbol);
// Add the Canada side of the Lake Superior graphic to the graphics overlay collection.
_graphicsOverlay.Graphics.Add(canadaSideGraphic);
// Create a simple line symbol for the outline of the USA side of Lake Superior.
SimpleLineSymbol usaSideSimpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Null, System.Drawing.Color.Blue, 0);
// Create the simple fill symbol for the USA side of Lake Superior graphic - comprised of a fill style, fill color and outline.
SimpleFillSymbol usaSideSimpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.ForwardDiagonal, System.Drawing.Color.Yellow, usaSideSimpleLineSymbol);
// Create the graphic for the USA side of Lake Superior - comprised of a polygon shape and fill symbol.
Graphic usaSideGraphic = new Graphic(cutGeometries[1], usaSideSimpleFillSymbol);
// Add the USA side of the Lake Superior graphic to the graphics overlay collection.
_graphicsOverlay.Graphics.Add(usaSideGraphic);
// Disable the button after has been used.
CutButton.IsEnabled = false;
}
catch (System.Exception ex)
{
// Display an error message if there is a problem generating cut operation.
var theMessageDialog = new MessageDialog2("Geometry Engine Failed: " + ex.Message);
await theMessageDialog.ShowAsync();
}
}
private async void StopEditTransaction(object sender, RoutedEventArgs e)
{
// Create a new dialog that prompts for commit, rollback, or cancel
var promptDialog = new MessageDialog2("Commit your edits to the local geodatabase or rollback to discard them.", "Stop Editing");
UICommand commitCommand = new UICommand("Commit");
UICommand rollbackCommand = new UICommand("Rollback");
UICommand cancelCommand = new UICommand("Cancel");
promptDialog.Options = MessageDialogOptions.None;
promptDialog.Commands.Add(commitCommand);
promptDialog.Commands.Add(rollbackCommand);
promptDialog.Commands.Add(cancelCommand);
// Ask the user if they want to commit or rollback the transaction (or cancel to keep working in the transaction)
IUICommand cmd = await promptDialog.ShowAsync();
if (cmd == commitCommand)
{
// See if there is a transaction active for the geodatabase
if (_localGeodatabase.IsInTransaction)
{
// If there is, commit the transaction to store the edits (this will also end the transaction)
_localGeodatabase.CommitTransaction();
MessageTextBlock.Text = "Edits were committed to the local geodatabase.";
}
}
else if (cmd == rollbackCommand)
{
// See if there is a transaction active for the geodatabase
if (_localGeodatabase.IsInTransaction)
{
// If there is, rollback the transaction to discard the edits (this will also end the transaction)
_localGeodatabase.RollbackTransaction();
MessageTextBlock.Text = "Edits were rolled back and not stored to the local geodatabase.";
}
}
else
{
// For 'cancel' don't end the transaction with a commit or rollback
}
}
private async void ClipButton_Click(object sender, RoutedEventArgs e)
{
try
{
// Remove the Colorado graphic from the input geometries graphics overlay collection. That way it will be easier
// to see the clip versions of the GeometryEngine.Clip operation.
_inputGeometriesGraphicsOverlay.Graphics.Remove(_coloradoGraphic);
// Loop through each graphic in the input geometries for the clip operation.
foreach (Graphic oneGraphic in _inputGeometriesGraphicsOverlay.Graphics)
{
// Perform the clip operation. The first parameter of the clip operation will always be the Colorado graphic.
// The second parameter of the clip operation will be one of the 3 different clip geometries (_outsideGraphic,
// _containedGraphic, or _intersectingGraphic).
Geometry myGeometry = GeometryEngine.Clip(_coloradoGraphic.Geometry, (Envelope)oneGraphic.Geometry);
// Only work on returned geometries that are not null.
if (myGeometry != null)
{
// Create the graphic as a result of the clip operation using the same symbology that was defined for
// the _coloradoGraphic defined in the Initialize() method previously.
Graphic clippedGraphic = new Graphic(myGeometry, _coloradoGraphic.Symbol);
// Add the clipped graphic to the clip areas graphics overlay collection.
_clipAreasGraphicsOverlay.Graphics.Add(clippedGraphic);
}
}
// Disable the button after has been used.
ClipButton.IsEnabled = false;
}
catch (System.Exception ex)
{
// Display an error message if there is a problem generating clip operation.
var theMessageDialog = new MessageDialog2("Geometry Engine Failed: " + ex.Message);
await theMessageDialog.ShowAsync();
}
}
private async void Initialize()
{
try
{
// Create a new Scene with an imagery basemap.
Scene myScene = new Scene(Basemap.CreateImagery());
// Add the Scene to the SceneView.
MySceneView.Scene = myScene;
// Create a new GraphicsOverlay and add it to the SceneView.
GraphicsOverlay graphicsOverlay = new GraphicsOverlay();
graphicsOverlay.SceneProperties.SurfacePlacement = SurfacePlacement.Relative;
MySceneView.GraphicsOverlays.Add(graphicsOverlay);
// Call a function to create a new distance composite symbol with three ranges.
DistanceCompositeSceneSymbol compositeSymbol = await CreateCompositeSymbol();
// Create a new point graphic with the composite symbol, add it to the graphics overlay.
MapPoint locationPoint = new MapPoint(-2.708471, 56.096575, 5000, SpatialReferences.Wgs84);
Graphic pointGraphic = new Graphic(locationPoint, compositeSymbol);
graphicsOverlay.Graphics.Add(pointGraphic);
// Add an orbit camera controller to lock the camera to the graphic.
OrbitGeoElementCameraController cameraController = new OrbitGeoElementCameraController(pointGraphic, 20)
{
CameraPitchOffset = 80,
CameraHeadingOffset = -30
};
MySceneView.CameraController = cameraController;
}
catch (Exception e)
{
var dialog = new MessageDialog2(e.ToString(), "Error");
await dialog.ShowAsync();
}
}
/// <summary>
/// Method abstracts the platform-specific message box functionality to maximize re-use of common code
/// </summary>
/// <param name="message">Text of the message to show.</param>
private async void ShowStatusMessage(string message)
{
// Display the message to the user
var dialog = new MessageDialog2(message);
await dialog.ShowAsync();
}
// Helper function to show a message
private async void ShowMessage(string message, string title)
{
var messageDialog = new MessageDialog2(message, title);
await messageDialog.ShowAsync();
}
private async void SaveMapClicked(object sender, RoutedEventArgs e)
{
try
{
// Don't attempt to save if the OAuth settings weren't provided
if (String.IsNullOrEmpty(_appClientId) || String.IsNullOrEmpty(_oAuthRedirectUrl))
{
var dialog = new MessageDialog2("OAuth settings were not provided.", "Cannot Save");
await dialog.ShowAsync();
return;
}
// Show the progress bar so the user knows work is happening
SaveProgressBar.Visibility = Visibility.Visible;
// Get the current map
Map myMap = MyMapView.Map;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Export the current map view to use as the item's thumbnail
RuntimeImage thumbnailImg = await MyMapView.ExportImageAsync();
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Get information for the new portal item
string title = TitleTextBox.Text;
string description = DescriptionTextBox.Text;
string tagText = TagsTextBox.Text;
// Make sure all required info was entered
if (String.IsNullOrEmpty(title) || String.IsNullOrEmpty(description) || String.IsNullOrEmpty(tagText))
{
throw new Exception("Please enter a title, description, and some tags to describe the map.");
}
// Call a function to save the map as a new portal item
await SaveNewMapAsync(MyMapView.Map, title, description, tagText.Split(','), thumbnailImg);
// Report a successful save
var messageDialog = new MessageDialog2("Saved '" + title + "' to ArcGIS Online!", "Map Saved");
await messageDialog.ShowAsync();
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Get the file stream from the new thumbnail image
Stream imageStream = await thumbnailImg.GetEncodedBufferAsync();
// Update the item thumbnail
((PortalItem)myMap.Item).SetThumbnail(imageStream);
await myMap.SaveAsync();
// Report update was successful
var messageDialog = new MessageDialog2("Saved changes to '" + myMap.Item.Title + "'", "Updates Saved");
await messageDialog.ShowAsync();
}
}
catch (Exception ex)
{
// Report error message
var messageDialog = new MessageDialog2("Error saving map to ArcGIS Online: " + ex.Message);
await messageDialog.ShowAsync();
}
finally
{
// Hide the progress bar
SaveProgressBar.Visibility = Visibility.Collapsed;
}
}
private async Task CalculateViewshed(MapPoint location)
{
// This function will define a new geoprocessing task that performs a custom viewshed analysis based upon a
// user click on the map and then display the results back as a polygon fill graphics overlay. If there
// is a problem with the execution of the geoprocessing task an error message will be displayed
// Create new geoprocessing task using the url defined in the member variables section
GeoprocessingTask myViewshedTask = await GeoprocessingTask.CreateAsync(new Uri(_viewshedUrl));
// Create a new feature collection table based upon point geometries using the current map view spatial reference
FeatureCollectionTable myInputFeatures = new FeatureCollectionTable(new List <Field>(), GeometryType.Point, MyMapView.SpatialReference);
// Create a new feature from the feature collection table. It will not have a coordinate location (x,y) yet
Feature myInputFeature = myInputFeatures.CreateFeature();
// Assign a physical location to the new point feature based upon where the user clicked in the map view
myInputFeature.Geometry = location;
// Add the new feature with (x,y) location to the feature collection table
await myInputFeatures.AddFeatureAsync(myInputFeature);
// Create the parameters that are passed to the used geoprocessing task
GeoprocessingParameters myViewshedParameters =
new GeoprocessingParameters(GeoprocessingExecutionType.SynchronousExecute)
{
// Request the output features to use the same SpatialReference as the map view
OutputSpatialReference = MyMapView.SpatialReference
};
// Add an input location to the geoprocessing parameters
myViewshedParameters.Inputs.Add("Input_Observation_Point", new GeoprocessingFeatures(myInputFeatures));
// Create the job that handles the communication between the application and the geoprocessing task
GeoprocessingJob myViewshedJob = myViewshedTask.CreateJob(myViewshedParameters);
try
{
// Execute analysis and wait for the results
GeoprocessingResult myAnalysisResult = await myViewshedJob.GetResultAsync();
// Get the results from the outputs
GeoprocessingFeatures myViewshedResultFeatures = (GeoprocessingFeatures)myAnalysisResult.Outputs["Viewshed_Result"];
// Add all the results as a graphics to the map
IFeatureSet myViewshedAreas = myViewshedResultFeatures.Features;
foreach (Feature myFeature in myViewshedAreas)
{
_resultOverlay.Graphics.Add(new Graphic(myFeature.Geometry));
}
}
catch (Exception ex)
{
// Display an error message if there is a problem
if (myViewshedJob.Status == JobStatus.Failed && myViewshedJob.Error != null)
{
var message = new MessageDialog2("Executing geoprocessing failed. " + myViewshedJob.Error.Message, "Geoprocessing error");
await message.ShowAsync();
}
else
{
var message = new MessageDialog2("An error occurred. " + ex, "Sample error");
await message.ShowAsync();
}
}
finally
{
// Indicate that the geoprocessing is not running
SetBusy(false);
}
}
private async void QuerySublayers_Click(object sender, RoutedEventArgs e)
{
// Clear selected features from the graphics overlay.
_selectedFeaturesOverlay.Graphics.Clear();
// If the population value entered is not numeric, warn the user and exit.
double populationNumber = 0.0;
if (!double.TryParse(PopulationTextBox.Text.Trim(), out populationNumber))
{
var dialog = new MessageDialog2("The population value must be numeric.", "Query error");
await dialog.ShowAsync();
return;
}
// Get the USA map image layer (the first and only operational layer in the map).
ArcGISMapImageLayer usaMapImageLayer = (ArcGISMapImageLayer)MyMapView.Map.OperationalLayers[0];
try
{
// Use a utility method on the map image layer to load all the sublayers and tables.
await usaMapImageLayer.LoadTablesAndLayersAsync();
// Get the sublayers of interest (skip 'Highways' since it doesn't have the POP2000 field).
ArcGISMapImageSublayer citiesSublayer = (ArcGISMapImageSublayer)usaMapImageLayer.Sublayers[0];
ArcGISMapImageSublayer statesSublayer = (ArcGISMapImageSublayer)usaMapImageLayer.Sublayers[2];
ArcGISMapImageSublayer countiesSublayer = (ArcGISMapImageSublayer)usaMapImageLayer.Sublayers[3];
// Get the service feature table for each of the sublayers.
ServiceFeatureTable citiesTable = citiesSublayer.Table;
ServiceFeatureTable statesTable = statesSublayer.Table;
ServiceFeatureTable countiesTable = countiesSublayer.Table;
// Create the query parameters that will find features in the current extent with a population greater than the value entered.
QueryParameters populationQuery = new QueryParameters
{
WhereClause = "POP2000 > " + PopulationTextBox.Text,
Geometry = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry
};
// Query each of the sublayers with the query parameters.
FeatureQueryResult citiesQueryResult = await citiesTable.QueryFeaturesAsync(populationQuery);
FeatureQueryResult statesQueryResult = await statesTable.QueryFeaturesAsync(populationQuery);
FeatureQueryResult countiesQueryResult = await countiesTable.QueryFeaturesAsync(populationQuery);
// Display the selected cities in the graphics overlay.
SimpleMarkerSymbol citySymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.Red, 16);
foreach (Feature city in citiesQueryResult)
{
Graphic cityGraphic = new Graphic(city.Geometry, citySymbol);
_selectedFeaturesOverlay.Graphics.Add(cityGraphic);
}
// Display the selected counties in the graphics overlay.
SimpleLineSymbol countyLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Dash, Color.Cyan, 2);
SimpleFillSymbol countySymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.DiagonalCross, Color.Cyan, countyLineSymbol);
foreach (Feature county in countiesQueryResult)
{
Graphic countyGraphic = new Graphic(county.Geometry, countySymbol);
_selectedFeaturesOverlay.Graphics.Add(countyGraphic);
}
// Display the selected states in the graphics overlay.
SimpleLineSymbol stateLineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.DarkCyan, 6);
SimpleFillSymbol stateSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle.Null, Color.Cyan, stateLineSymbol);
foreach (Feature state in statesQueryResult)
{
Graphic stateGraphic = new Graphic(state.Geometry, stateSymbol);
_selectedFeaturesOverlay.Graphics.Add(stateGraphic);
}
}
catch (Exception ex)
{
await new MessageDialog2(ex.ToString(), "Error").ShowAsync();
}
}
private async void OnAnalyzeHotspotsClicked(object sender, RoutedEventArgs e)
{
// Clear any existing results
MyMapView.Map.OperationalLayers.Clear();
// Show the BusyOverlay indication
ShowBusyOverlay();
// Get the 'from' and 'to' dates from the date pickers for the geoprocessing analysis
DateTimeOffset myFromDate = FromDate.Date;
DateTimeOffset myToDate = ToDate.Date;
// The end date must be at least one day after the start date
if (myToDate <= myFromDate.AddDays(1))
{
// Show error message
var message = new MessageDialog2("Please select valid time range. There has to be at least one day in between To and From dates.",
"Invalid date range");
await message.ShowAsync();
// Remove the BusyOverlay
ShowBusyOverlay(false);
return;
}
// Create the parameters that are passed to the used geoprocessing task
GeoprocessingParameters myHotspotParameters = new GeoprocessingParameters(GeoprocessingExecutionType.AsynchronousSubmit);
// Construct the date query
string myQueryString = $"(\"DATE\" > date '{myFromDate:yyyy-MM-dd} 00:00:00' AND \"DATE\" < date '{myToDate:yyyy-MM-dd} 00:00:00')";
// Add the query that contains the date range used in the analysis
myHotspotParameters.Inputs.Add("Query", new GeoprocessingString(myQueryString));
// Create job that handles the communication between the application and the geoprocessing task
_hotspotJob = _hotspotTask.CreateJob(myHotspotParameters);
try
{
// Execute the geoprocessing analysis and wait for the results
GeoprocessingResult myAnalysisResult = await _hotspotJob.GetResultAsync();
// Add results to a map using map server from a geoprocessing task
// Load to get access to full extent
await myAnalysisResult.MapImageLayer.LoadAsync();
// Add the analysis layer to the map view
MyMapView.Map.OperationalLayers.Add(myAnalysisResult.MapImageLayer);
// Zoom to the results
await MyMapView.SetViewpointAsync(new Viewpoint(myAnalysisResult.MapImageLayer.FullExtent));
}
catch (TaskCanceledException)
{
// This is thrown if the task is canceled. Ignore.
}
catch (Exception ex)
{
// Display error messages if the geoprocessing task fails
if (_hotspotJob.Status == JobStatus.Failed && _hotspotJob.Error != null)
{
var message = new MessageDialog2("Executing geoprocessing failed. " + _hotspotJob.Error.Message, "Geoprocessing error");
await message.ShowAsync();
}
else
{
var message = new MessageDialog2("An error occurred. " + ex.ToString(), "Sample error");
await message.ShowAsync();
}
}
finally
{
// Remove the BusyOverlay
ShowBusyOverlay(false);
}
}
// Handle a new selected comment record in the table view.
private async void CommentsListBox_SelectionChanged(object sender, Microsoft.UI.Xaml.Controls.SelectionChangedEventArgs e)
{
// Clear selected features from the graphics overlay.
_selectedFeaturesOverlay.Graphics.Clear();
// Get the selected comment feature. If there is no selection, return.
ArcGISFeature selectedComment = e.AddedItems[0] as ArcGISFeature;
if (selectedComment == null)
{
return;
}
// Get the map image layer that contains the service request sublayer and the service request comments table.
ArcGISMapImageLayer serviceRequestsMapImageLayer = (ArcGISMapImageLayer)MyMapView.Map.OperationalLayers[0];
// Get the (non-spatial) table that contains the service request comments.
ServiceFeatureTable commentsTable = serviceRequestsMapImageLayer.Tables[0];
// Get the relationship that defines related service request features for features in the comments table (this is the first and only relationship).
RelationshipInfo commentsRelationshipInfo = commentsTable.LayerInfo.RelationshipInfos.FirstOrDefault();
// Create query parameters to get the related service request for features in the comments table.
RelatedQueryParameters relatedQueryParams = new RelatedQueryParameters(commentsRelationshipInfo)
{
ReturnGeometry = true
};
try
{
// Query the comments table to get the related service request feature for the selected comment.
IReadOnlyList <RelatedFeatureQueryResult> relatedRequestsResult = await commentsTable.QueryRelatedFeaturesAsync(selectedComment, relatedQueryParams);
// Get the first result.
RelatedFeatureQueryResult result = relatedRequestsResult.FirstOrDefault();
// Get the first feature from the result. If it's null, warn the user and return.
ArcGISFeature serviceRequestFeature = result.FirstOrDefault() as ArcGISFeature;
if (serviceRequestFeature == null)
{
var message = new MessageDialog2("Related feature not found.", "No Feature");
await message.ShowAsync();
return;
}
// Load the related service request feature (so its geometry is available).
await serviceRequestFeature.LoadAsync();
// Get the service request geometry (point).
MapPoint serviceRequestPoint = serviceRequestFeature.Geometry as MapPoint;
// Create a cyan marker symbol to display the related feature.
Symbol selectedRequestSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.Cyan, 14);
// Create a graphic using the service request point and marker symbol.
Graphic requestGraphic = new Graphic(serviceRequestPoint, selectedRequestSymbol);
// Add the graphic to the graphics overlay and zoom the map view to its extent.
_selectedFeaturesOverlay.Graphics.Add(requestGraphic);
await MyMapView.SetViewpointCenterAsync(serviceRequestPoint, 150000);
}
catch (Exception ex)
{
await new MessageDialog2(ex.ToString(), "Error").ShowAsync();
}
}
// Note: all code below (except call to ConfigureOfflineJobForBasemap) is identical to code in the Generate offline map sample.
#region Generate offline map
private async void Initialize()
{
try
{
// Call a function to set up the AuthenticationManager for OAuth.
SetOAuthInfo();
// Create the ArcGIS Online portal.
ArcGISPortal portal = await ArcGISPortal.CreateAsync();
// Get the Naperville water web map item using its ID.
PortalItem webmapItem = await PortalItem.CreateAsync(portal, WebMapId);
// Create a map from the web map item.
Map onlineMap = new Map(webmapItem);
// Display the map in the MapView.
MyMapView.Map = onlineMap;
// Disable user interactions on the map (no panning or zooming from the initial extent).
MyMapView.InteractionOptions = new MapViewInteractionOptions
{
IsEnabled = false
};
// Create a graphics overlay for the extent graphic and apply a renderer.
SimpleLineSymbol aoiOutlineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.Red, 3);
GraphicsOverlay extentOverlay = new GraphicsOverlay
{
Renderer = new SimpleRenderer(aoiOutlineSymbol)
};
MyMapView.GraphicsOverlays.Add(extentOverlay);
// Add a graphic to show the area of interest (extent) that will be taken offline.
Graphic aoiGraphic = new Graphic(_areaOfInterest);
extentOverlay.Graphics.Add(aoiGraphic);
// Hide the map loading progress indicator.
LoadingIndicator.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
// When the map view unloads, try to clean up existing output data folders.
MyMapView.Unloaded += (s, e) =>
{
// Find output mobile map folders in the temp directory.
string[] outputFolders = Directory.GetDirectories(Environment.ExpandEnvironmentVariables("%TEMP%"), "NapervilleWaterNetwork*");
// Loop through the folder names and delete them.
foreach (string dir in outputFolders)
{
try
{
// Delete the folder.
Directory.Delete(dir, true);
}
catch (Exception)
{
// Ignore exceptions (files might be locked, for example).
}
}
};
}
catch (Exception ex)
{
var dialog = new MessageDialog2(ex.ToString(), "Error loading map");
await dialog.ShowAsync();
}
}
private async Task <MultilayerPointSymbol> GetCurrentSymbol()
{
// If the style hasn't been opened, return.
if (_emojiStyle == null)
{
return(null);
}
MultilayerPointSymbol faceSymbol = null;
try
{
// Get the key that identifies the selected eye symbol (or an empty string if none selected).
SymbolLayerInfo eyeLayerInfo = (SymbolLayerInfo)EyeSymbolList.SelectedItem;
string eyeLayerKey = eyeLayerInfo != null ? eyeLayerInfo.Key : string.Empty;
// Get the key that identifies the selected mouth symbol (or an empty string if none selected).
SymbolLayerInfo mouthLayerInfo = (SymbolLayerInfo)MouthSymbolList.SelectedItem;
string mouthLayerKey = mouthLayerInfo != null ? mouthLayerInfo.Key : string.Empty;
// Get the key that identifies the selected hat symbol (or an empty string if none selected).
SymbolLayerInfo hatLayerInfo = (SymbolLayerInfo)HatSymbolList.SelectedItem;
string hatLayerKey = hatLayerInfo != null ? hatLayerInfo.Key : string.Empty;
// Create a list of the symbol keys that identify the selected symbol layers, including the base (circle) symbol.
List <string> symbolKeys = new List <string>
{
_baseSymbolKey, eyeLayerKey, mouthLayerKey, hatLayerKey
};
// Get a multilayer point symbol from the style that contains the selected symbol layers.
faceSymbol = await _emojiStyle.GetSymbolAsync(symbolKeys) as MultilayerPointSymbol;
// Loop through all symbol layers and lock the color.
foreach (SymbolLayer lyr in faceSymbol.SymbolLayers)
{
// Changing the color of the symbol will not affect this layer.
lyr.IsColorLocked = true;
}
// Unlock the color for the base (first) layer. Changing the symbol color will change this layer's color.
faceSymbol.SymbolLayers.First().IsColorLocked = false;
// Set the symbol color from the combo box.
if (FaceColorComboBox.SelectedItem != null)
{
faceSymbol.Color = (Color)FaceColorComboBox.SelectedItem;
}
// Set the symbol size from the slider.
faceSymbol.Size = SizeSlider.Value;
}
catch (Exception ex)
{
// Report the exception.
var dialog = new MessageDialog2("Error creating the symbol: " + ex.Message);
await dialog.ShowAsync();
}
// Return the multilayer point symbol.
return(faceSymbol);
}
private async Task ReadMobileStyle(string stylePath)
{
try
{
// Open the mobile style file at the provided path.
_emojiStyle = await SymbolStyle.OpenAsync(stylePath);
// Get the default style search parameters.
SymbolStyleSearchParameters searchParams = await _emojiStyle.GetDefaultSearchParametersAsync();
// Search the style with the default parameters to return all symbol results.
IList <SymbolStyleSearchResult> styleResults = await _emojiStyle.SearchSymbolsAsync(searchParams);
// Create an empty placeholder image to represent "no symbol" for each category.
ImageSource emptyImage = null;
// Create lists to contain the available symbol layers for each category of symbol and add an empty entry as default.
List <SymbolLayerInfo> eyeSymbolInfos = new List <SymbolLayerInfo> {
new SymbolLayerInfo("", emptyImage, "")
};
List <SymbolLayerInfo> mouthSymbolInfos = new List <SymbolLayerInfo> {
new SymbolLayerInfo("", emptyImage, "")
};
List <SymbolLayerInfo> hatSymbolInfos = new List <SymbolLayerInfo>()
{
new SymbolLayerInfo("", emptyImage, "")
};
// Loop through the results and put symbols into the appropriate list according to category.
foreach (SymbolStyleSearchResult result in styleResults)
{
// Get the symbol for this result.
MultilayerPointSymbol multiLayerSym = await result.GetSymbolAsync() as MultilayerPointSymbol;
// Create a swatch image from the symbol.
RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync();
ImageSource symbolImage = await swatch.ToImageSourceAsync();
// Create a symbol layer info object to represent the symbol in the list.
// The symbol key will be used to retrieve the symbol from the style.
SymbolLayerInfo symbolInfo = new SymbolLayerInfo(result.Name, symbolImage, result.Key);
// Add the symbol layer info to the correct list for its category.
switch (result.Category)
{
case "Eyes":
{
eyeSymbolInfos.Add(symbolInfo);
break;
}
case "Mouth":
{
mouthSymbolInfos.Add(symbolInfo);
break;
}
case "Hat":
{
hatSymbolInfos.Add(symbolInfo);
break;
}
}
}
// Show the symbols in the category list boxes.
EyeSymbolList.ItemsSource = eyeSymbolInfos;
MouthSymbolList.ItemsSource = mouthSymbolInfos;
HatSymbolList.ItemsSource = hatSymbolInfos;
// Call a function to construct the current symbol (default yellow circle).
Symbol faceSymbol = await GetCurrentSymbol();
// Call a function to show a preview image of the symbol.
await UpdateSymbolPreview(faceSymbol);
}
catch (Exception ex)
{
// Report the exception.
var dialog = new MessageDialog2("Error reading symbols from style: " + ex.Message);
await dialog.ShowAsync();
}
}
private async void AddMapItemClick(object sender, RoutedEventArgs e)
{
// Get a web map from the selected portal item and display it in the map view.
if (MapItemListBox.SelectedItem == null)
{
var dialog = new MessageDialog2("No web map item is selected.");
await dialog.ShowAsync();
return;
}
// Clear status messages.
MessagesTextBlock.Text = string.Empty;
// Store status (or errors) when adding the map.
var statusInfo = new StringBuilder();
try
{
// Clear the current MapView control from the app.
MyMapGrid.Children.Clear();
// See if using the public or secured portal; get the appropriate object reference.
ArcGISPortal portal = null;
if (_usingPublicPortal)
{
portal = _publicPortal;
}
else
{
portal = _iwaSecuredPortal;
}
// Throw an exception if the portal is null.
if (portal == null)
{
throw new Exception("Portal has not been instantiated.");
}
// Get the portal item ID from the selected list box item (read it from the Tag property).
var itemId = (MapItemListBox.SelectedItem as ListBoxItem).Tag.ToString();
// Use the item ID to create a PortalItem from the appropriate portal.
var portalItem = await PortalItem.CreateAsync(portal, itemId);
if (portalItem != null)
{
// Create a Map using the web map (portal item).
Map webMap = new Map(portalItem);
// Create a new MapView control to display the Map.
MapView myMapView = new MapView
{
Map = webMap
};
// Add the MapView to the app.
MyMapGrid.Children.Add(myMapView);
}
// Report success.
statusInfo.AppendLine("Successfully loaded web map from item #" + itemId + " from " + portal.Uri.Host);
}
catch (Exception ex)
{
// Add an error message.
statusInfo.AppendLine("Error accessing web map: " + ex.Message);
}
finally
{
// Show messages.
MessagesTextBlock.Text = statusInfo.ToString();
}
}
private async void TakeMapOfflineButton_Click(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
{
// Create a new folder for the output mobile map.
string packagePath = Path.Combine(Environment.ExpandEnvironmentVariables("%TEMP%"), @"NapervilleWaterNetwork");
int num = 1;
while (Directory.Exists(packagePath))
{
packagePath = Path.Combine(Environment.ExpandEnvironmentVariables("%TEMP%"), @"NapervilleWaterNetwork" + num.ToString());
num++;
}
// Create the output directory.
Directory.CreateDirectory(packagePath);
try
{
// Show the progress indicator while the job is running.
BusyIndicator.Visibility = Microsoft.UI.Xaml.Visibility.Visible;
// Create an offline map task with the current (online) map.
OfflineMapTask takeMapOfflineTask = await OfflineMapTask.CreateAsync(MyMapView.Map);
// Create the default parameters for the task, pass in the area of interest.
GenerateOfflineMapParameters parameters = await takeMapOfflineTask.CreateDefaultGenerateOfflineMapParametersAsync(_areaOfInterest);
// Configure basemap settings for the job.
await ConfigureOfflineJobForBasemap(parameters);
// Create the job with the parameters and output location.
_generateOfflineMapJob = takeMapOfflineTask.GenerateOfflineMap(parameters, packagePath);
// Handle the progress changed event for the job.
_generateOfflineMapJob.ProgressChanged += OfflineMapJob_ProgressChanged;
// Await the job to generate geodatabases, export tile packages, and create the mobile map package.
GenerateOfflineMapResult results = await _generateOfflineMapJob.GetResultAsync();
// Check for job failure (writing the output was denied, e.g.).
if (_generateOfflineMapJob.Status != JobStatus.Succeeded)
{
var dialog = new MessageDialog2("Generate offline map package failed.", "Job status");
await dialog.ShowAsync();
BusyIndicator.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
}
// Check for errors with individual layers.
if (results.LayerErrors.Any())
{
// Build a string to show all layer errors.
System.Text.StringBuilder errorBuilder = new System.Text.StringBuilder();
foreach (KeyValuePair <Layer, Exception> layerError in results.LayerErrors)
{
errorBuilder.AppendLine($"{layerError.Key.Id} : {layerError.Value.Message}");
}
// Show layer errors.
string errorText = errorBuilder.ToString();
var dialog = new MessageDialog2(errorText, "Layer errors");
await dialog.ShowAsync();
}
// Display the offline map.
MyMapView.Map = results.OfflineMap;
// Apply the original viewpoint for the offline map.
MyMapView.SetViewpoint(new Viewpoint(_areaOfInterest));
// Enable map interaction so the user can explore the offline data.
MyMapView.InteractionOptions.IsEnabled = true;
// Hide the "Take map offline" button.
TakeOfflineArea.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
// Show a message that the map is offline.
MessageArea.Visibility = Microsoft.UI.Xaml.Visibility.Visible;
}
catch (TaskCanceledException)
{
// Generate offline map task was canceled.
var dialog = new MessageDialog2("Taking map offline was canceled");
await dialog.ShowAsync();
}
catch (Exception ex)
{
// Exception while taking the map offline.
var dialog = new MessageDialog2(ex.Message, "Offline map error");
await dialog.ShowAsync();
}
finally
{
// Hide the activity indicator when the job is done.
BusyIndicator.Visibility = Microsoft.UI.Xaml.Visibility.Collapsed;
}
}