private async void BtnCountFeaturesClick(object sender, RoutedEventArgs e)
{
try
{
// Get the current visible extent.
Geometry currentExtent = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry;
// Create the query parameters.
QueryParameters queryCityCount = new QueryParameters
{
Geometry = currentExtent,
// Specify the interpretation of the Geometry query parameters.
SpatialRelationship = SpatialRelationship.Intersects
};
// Get the count of matching features.
long count = await _featureTable.QueryFeatureCountAsync(queryCityCount);
// Update the UI.
ResultsTextbox.Text = $"{count} features in extent";
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Error");
}
}
protected override void OnKeyUp(KeyEventArgs e)
{
base.OnKeyUp(e);
if (e.Key == Key.Space)
{
if (Keyboard.Modifiers == ModifierKeys.Control)
{
try
{
var targetFile = "Viewpoints.json";
var json = string.Join($",{Environment.NewLine}", _viewpoints.Select(JsonAsString));
File.WriteAllText(targetFile, json);
MessageBox.Show(this, $"Saved to file {targetFile}");
}
catch (Exception ex)
{
MessageBox.Show(this, ex.Message);
}
}
else
{
var viewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.CenterAndScale);
Trace.WriteLine(viewpoint.ToJson());
_viewpoints.Add(viewpoint);
}
}
}
// Creates a two-part polygon and a four-part polyline to use as test graphics for the Boundary method
private void CreateTestGraphics()
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var center = viewpointExtent.GetCenter();
var width = viewpointExtent.Width / 4;
var left = new MapPoint(center.X - width, center.Y, MyMapView.SpatialReference);
var right = new MapPoint(center.X + width, center.Y, MyMapView.SpatialReference);
var fillSymbol = new SimpleFillSymbol()
{
Color = Colors.Red, Style = SimpleFillStyle.Solid
};
var lineSymbol = new SimpleLineSymbol()
{
Color = Colors.Red, Style = SimpleLineStyle.Solid, Width = 2
};
_testGraphics.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(left, width), Symbol = fillSymbol
});
_testGraphics.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineBox(right, width), Symbol = lineSymbol
});
}
// Function to get suitable datum transformations for the specified input and output spatial references.
private void GetSuitableTransformations(SpatialReference inSpatialRef, SpatialReference outSpatialRef, bool considerExtent)
{
// Get suitable transformations. Use the current extent to evaluate suitability, if requested.
IReadOnlyList <DatumTransformation> transformations;
if (considerExtent)
{
Envelope currentExtent = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry as Envelope;
transformations = TransformationCatalog.GetTransformationsBySuitability(inSpatialRef, outSpatialRef, currentExtent);
}
else
{
transformations = TransformationCatalog.GetTransformationsBySuitability(inSpatialRef, outSpatialRef);
}
// Get the default transformation for the specified input and output spatial reference.
DatumTransformation defaultTransform = TransformationCatalog.GetTransformation(inSpatialRef, outSpatialRef);
// Reset list.
SuitableTransformationsList.Clear();
// Wrap the transformations in a class that includes a boolean to indicate if it's the default transformation.
foreach (DatumTransformation transform in transformations)
{
DatumTransformationListBoxItem item = new DatumTransformationListBoxItem(transform)
{
IsDefault = (transform.Name == defaultTransform.Name)
};
SuitableTransformationsList.Add(item);
}
}
private async void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)
{
try
{
_trafficOverlay.Visibility = Visibility.Collapsed;
_trafficOverlay.DataContext = null;
var identifyTask = new IdentifyTask(new Uri(_trafficLayer.ServiceUri));
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
IdentifyParameters identifyParams = new IdentifyParameters(e.Location, viewpointExtent, 5, (int)MyMapView.ActualHeight, (int)MyMapView.ActualWidth)
{
LayerIDs = new int[] { 2, 3, 4 },
LayerOption = LayerOption.Top,
SpatialReference = MyMapView.SpatialReference,
};
var result = await identifyTask.ExecuteAsync(identifyParams);
if (result != null && result.Results != null && result.Results.Count > 0)
{
_trafficOverlay.DataContext = result.Results.First();
_trafficOverlay.Visibility = Visibility.Visible;
}
}
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
// Continually accepts user-entered points
// - Buffered polygons are created from the points and added to the graphics layer
private async Task AcceptClassPointsAsync()
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
try
{
while (true)
{
var point = await MyMapView.Editor.RequestPointAsync();
var polygon = GeometryEngine.Buffer(point, viewpointExtent.Width * .01);
var attr = new Dictionary <string, object>()
{
{ "ID", _graphicsOverlay.Graphics.Count + 1 }
};
_graphicsOverlay.Graphics.Add(new Graphic(polygon, attr));
}
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
var _ = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
// Draw and densify a user defined polygon
private async void DensifyButton_Click(object sender, RoutedEventArgs e)
{
try
{
_inputOverlay.Graphics.Clear();
_resultOverlay.Graphics.Clear();
// Request polygon from the user
var poly = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polygon, _polySymbol) as Polygon;
// Add original polygon and vertices to input graphics layer
_inputOverlay.Graphics.Add(new Graphic(poly, _polySymbol));
foreach (var coord in poly.Parts.First().GetPoints())
{
_inputOverlay.Graphics.Add(new Graphic(coord, _origVertexSymbol));
}
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
// Densify the polygon
var densify = GeometryEngine.Densify(poly, viewpointExtent.Width / 100) as Polygon;
// Add new vertices to result graphics layer
foreach (var coord in densify.Parts.First().GetPoints())
{
_resultOverlay.Graphics.Add(new Graphic(coord, _newVertexSymbol));
}
}
catch (Exception ex)
{
var _x = new MessageDialog("Densify Error: " + ex.Message, "Sample Error").ShowAsync();
}
}
private async void MyMapView_LayerLoaded(object sender, LayerLoadedEventArgs e)
{
if (e.Layer.ID == "ParcelsGraphicsLayer")
{
if (parcelGraphicsLayer != null && parcelGraphicsLayer.Graphics.Count == 0)
{
QueryTask queryTask = new QueryTask(new Uri("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/TaxParcel/AssessorsParcelCharacteristics/MapServer/1"));
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
//Create a geometry to use as the extent within which parcels will be returned
var contractRatio = viewpointExtent.Width / 6;
var extentGeometry = new Envelope(viewpointExtent.GetCenter().X - contractRatio,
viewpointExtent.GetCenter().Y - contractRatio,
viewpointExtent.GetCenter().X + contractRatio,
viewpointExtent.GetCenter().Y + contractRatio,
MyMapView.SpatialReference);
Query query = new Query(extentGeometry);
query.ReturnGeometry = true;
query.OutSpatialReference = MyMapView.SpatialReference;
var results = await queryTask.ExecuteAsync(query, CancellationToken.None);
foreach (Graphic g in results.FeatureSet.Features)
{
parcelGraphicsLayer.Graphics.Add(g);
}
}
await DoIntersection();
}
}
// Update the UI grid with bird data queried from local gdb
private async Task RefreshDataView()
{
LocalBirdFeatures = await _localBirdsLayer.FeatureTable.QueryAsync(new QueryFilter()
{
WhereClause = "1=1"
});
QueryTask queryTask = new QueryTask(new Uri(_onlineBirdsLayer.ServiceUri + "/1"));
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
Query query = new Query("1=1")
{
Geometry = viewpointExtent, OutFields = new OutFields(new string[] { "globalid" })
};
var queryResult = await queryTask.ExecuteAsync(query);
var onlineBirdIds = queryResult.FeatureSet.Features.Select(f => f.Attributes["globalid"]);
var localBirdIds = LocalBirdFeatures.Select(b => b.Attributes["globalid"]);
var newBirdsIds = localBirdIds.Except(onlineBirdIds);
var newBirdOIDs = from newBird in LocalBirdFeatures
join newBirdId in newBirdsIds on newBird.Attributes["globalid"] equals newBirdId
select(long) newBird.Attributes["objectid"];
_localBirdsLayer.ClearSelection();
_localBirdsLayer.SelectFeatures(newBirdOIDs.ToArray());
}
private async void BtnCountFeatures_Click(object sender, EventArgs e)
{
// Get the current visible extent.
Geometry currentExtent = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry;
// Create the query parameters.
QueryParameters queryCityCount = new QueryParameters
{
Geometry = currentExtent,
// Specify the interpretation of the Geometry query parameters.
SpatialRelationship = SpatialRelationship.Intersects
};
try
{
// Get the count of matching features.
long count = await _featureTable.QueryFeatureCountAsync(queryCityCount);
// Update the UI.
txtResults.Text = $"{count} features in extent";
}
catch (Exception ex)
{
await Application.Current.MainPage.DisplayAlert("Error", ex.ToString(), "OK");
}
}
private async void OnSaveMapClick(object sender, RoutedEventArgs e)
{
try
{
// Create a challenge request for portal credentials (OAuth credential request for arcgis.com)
CredentialRequestInfo challengeRequest = new CredentialRequestInfo();
// Use the OAuth implicit grant flow
challengeRequest.GenerateTokenOptions = new GenerateTokenOptions
{
TokenAuthenticationType = TokenAuthenticationType.OAuthImplicit
};
// Indicate the url (portal) to authenticate with (ArcGIS Online)
challengeRequest.ServiceUri = new Uri("https://www.arcgis.com/sharing/rest");
// Call GetCredentialAsync on the AuthenticationManager to invoke the challenge handler
await AuthenticationManager.Current.GetCredentialAsync(challengeRequest, false);
// Get information for the new portal item
var title = TitleTextBox.Text;
var description = DescriptionTextBox.Text;
var tags = TagsTextBox.Text.Split(',');
// Throw an exception if the text is null or empty for title or description
if (string.IsNullOrEmpty(title) || string.IsNullOrEmpty(description))
{
throw new Exception("Title and description are required");
}
// Get current map extent (viewpoint) for the map initial extent
var currentViewpoint = MyMapView.GetCurrentViewpoint(Esri.ArcGISRuntime.Mapping.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
if (!_mapViewModel.MapIsSaved)
{
// Call the SaveNewMapAsync method on the view model, pass in the required info
await _mapViewModel.SaveNewMapAsync(currentViewpoint, title, description, tags, thumbnailImg);
// Report success
MessageBox.Show("Map '" + title + "' was saved to your portal");
}
else
{
// Map has previously been saved as a portal item, update it (title, description, and tags will remain the same)
_mapViewModel.UpdateMapItem();
// Report success
MessageBox.Show("Changes to '" + title + "' were updated to the portal.");
}
}
catch (Exception ex)
{
// Report error
MessageBox.Show("Error while saving: " + ex.Message);
}
}
/// <summary>
/// Begins the export process
/// </summary>
private void MyExportPreviewButton_Clicked(object sender, EventArgs e)
{
// If preview isn't open, start an export
if (!_previewOpen)
{
// Show the progress bar
MyProgressBar.IsVisible = true;
// Save the map viewpoint
_originalView = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Start the export
StartExport();
}
else // Otherwise, close the preview
{
// Change the button text
MyExportPreviewButton.Text = "Export Tiles";
// Clear the preview open flag
_previewOpen = false;
// Re-size the mapview
MyMapView.Margin = new Thickness(0);
// Re-apply the original map
MyMapView.Map = _basemap;
// Re-apply the original viewpoint
MyMapView.SetViewpoint(_originalView);
}
}
// Generate / download and display layers from a generated geodatabase
private async void GenerateGeodatabaseButton_Click(object sender, RoutedEventArgs e)
{
try
{
panelUI.IsEnabled = false;
panelStatus.Visibility = Visibility.Visible;
ReportStatus("Creating GeodatabaseSyncTask...");
var syncTask = new GeodatabaseSyncTask(new Uri(BASE_URL));
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var options = new GenerateGeodatabaseParameters(new int[] { 0, 1, 2 }, viewpointExtent)
{
GeodatabasePrefixName = GDB_PREFIX,
ReturnAttachments = false,
OutSpatialReference = MyMapView.SpatialReference,
SyncModel = SyncModel.PerLayer
};
var tcs = new TaskCompletionSource <GeodatabaseStatusInfo>();
Action <GeodatabaseStatusInfo, Exception> completionAction = (info, ex) =>
{
if (ex != null)
{
tcs.SetException(ex);
}
tcs.SetResult(info);
};
var generationProgress = new Progress <GeodatabaseStatusInfo>();
generationProgress.ProgressChanged += (sndr, sts) => { ReportStatus(sts.Status.ToString()); };
ReportStatus("Starting GenerateGeodatabase...");
var result = await syncTask.GenerateGeodatabaseAsync(options, completionAction,
TimeSpan.FromSeconds(3), generationProgress, CancellationToken.None);
ReportStatus("Waiting on geodatabase from server...");
var statusResult = await tcs.Task;
ReportStatus("Downloading Geodatabase...");
var gdbPath = await DownloadGeodatabase(statusResult);
ReportStatus("Create local feature layers...");
await CreateFeatureLayersAsync(gdbPath);
MyMapView.Map.Layers["wildfireGroup"].IsVisible = false;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Sample Error");
}
finally
{
panelStatus.Visibility = Visibility.Collapsed;
panelUI.IsEnabled = true;
}
}
// Process user selection and point clicks
private async Task ProcessUserPointsAsync(bool isTargetSelected)
{
try
{
txtResult.Visibility = Visibility.Collapsed;
txtResult.Text = string.Empty;
if (MyMapView.Editor.IsActive)
{
MyMapView.Editor.Cancel.Execute(null);
}
if (!isTargetSelected)
{
await SelectTargetGeometryAsync();
}
while (MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry.Extent != null)
{
await GetNearestCoordAsync((bool)cboVertexOnly.IsChecked);
}
}
catch (TaskCanceledException) { }
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message, "Nearest Coordinate Sample");
}
}
// Accept user map clicks and add points to the graphics layer with the selected symbol
private async Task AcceptPointsAsync()
{
try
{
while (MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry.Extent != null)
{
SampleSymbol sampleSymbol = _symbols[symbolCombo.SelectedIndex];
Esri.ArcGISRuntime.Geometry.Geometry shape = null;
if (sampleSymbol.Symbol is LineSymbol)
{
shape = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polyline, sampleSymbol.Symbol);
}
else
{
shape = await MyMapView.Editor.RequestShapeAsync(DrawShape.Polygon, sampleSymbol.Symbol);
}
_graphicsOverlay.Graphics.Add(new Graphic(shape, sampleSymbol.Symbol));
await Task.Delay(100);
}
}
catch (TaskCanceledException)
{
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message, "Line and Fill Symbols");
}
}
// Draw the unsimplified polygon
private void DrawPolygon()
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
MapPoint center = viewpointExtent.GetCenter();
double lat = center.Y;
double lon = center.X + 300;
double latOffset = 300;
double lonOffset = 300;
var points = new PointCollection()
{
new MapPoint(lon - lonOffset, lat),
new MapPoint(lon, lat + latOffset),
new MapPoint(lon + lonOffset, lat),
new MapPoint(lon, lat - latOffset),
new MapPoint(lon - lonOffset, lat),
new MapPoint(lon - 2 * lonOffset, lat + latOffset),
new MapPoint(lon - 3 * lonOffset, lat),
new MapPoint(lon - 2 * lonOffset, lat - latOffset),
new MapPoint(lon - 1.5 * lonOffset, lat + latOffset),
new MapPoint(lon - lonOffset, lat)
};
_unsimplifiedPolygon = new Polygon(points, MyMapView.SpatialReference);
_polygonOverlay.Graphics.Clear();
_polygonOverlay.Graphics.Add(new Graphic(_unsimplifiedPolygon));
}
private void OnViewpointChanged(object sender, EventArgs e)
{
// Get the MapView or SceneView that sent the event
GeoView sendingView = (GeoView)sender;
// Only take action if this geoview is the one that the user is navigating.
// Viewpoint changed events are fired when SetViewpoint is called; This check prevents a feedback loop
if (sendingView.IsNavigating)
{
// If the MapView sent the event, update the SceneView's viewpoint
if (sender is MapView)
{
// Get the viewpoint
Viewpoint updateViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.CenterAndScale);
// Set the viewpoint
MySceneView.SetViewpoint(updateViewpoint);
}
else // Else, update the MapView's viewpoint
{
// Get the viewpoint
Viewpoint updateViewpoint = MySceneView.GetCurrentViewpoint(ViewpointType.CenterAndScale);
// Set the viewpoint
MyMapView.SetViewpoint(updateViewpoint);
}
}
}
// Find matching places, create graphics and add them to the UI
private async void FindButton_Click(object sender, RoutedEventArgs e)
{
try
{
progress.Visibility = Visibility.Visible;
listResults.Visibility = Visibility.Collapsed;
_addressOverlay.Graphics.Clear();
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var param = new OnlineLocatorFindParameters(SearchTextBox.Text)
{
SearchExtent = viewpointExtent,
Location = viewpointExtent.GetCenter(),
MaxLocations = 5,
OutSpatialReference = MyMapView.SpatialReference,
OutFields = new string[] { "Place_addr" }
};
var candidateResults = await _locatorTask.FindAsync(param, CancellationToken.None);
if (candidateResults == null || candidateResults.Count == 0)
{
throw new Exception("No candidates found in the current map extent.");
}
foreach (var candidate in candidateResults)
{
AddGraphicFromLocatorCandidate(candidate);
}
var extent = GeometryEngine.Union(_addressOverlay.Graphics.Select(g => g.Geometry)).Extent.Expand(1.1);
await MyMapView.SetViewAsync(extent);
listResults.Visibility = Visibility.Visible;
}
catch (AggregateException ex)
{
var innermostExceptions = ex.Flatten().InnerExceptions;
if (innermostExceptions != null && innermostExceptions.Count > 0)
{
var _x = new MessageDialog(string.Join(" > ", innermostExceptions.Select(i => i.Message).ToArray()), "Sample Error").ShowAsync();
}
else
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
finally
{
progress.Visibility = Visibility.Collapsed;
}
}
private async Task RunIdentify(MapPoint mp)
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
IdentifyParameters identifyParams = new IdentifyParameters(mp, viewpointExtent, 2, (int)MyMapView.ActualHeight, (int)MyMapView.ActualWidth)
{
LayerOption = LayerOption.Visible,
SpatialReference = MyMapView.SpatialReference,
};
IdentifyTask identifyTask = new IdentifyTask(new Uri("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/" +
"Demographics/ESRI_Census_USA/MapServer"));
progress.IsActive = true;
try
{
TitleComboBox.ItemsSource = null;
ResultsGrid.ItemsSource = null;
var result = await identifyTask.ExecuteAsync(identifyParams);
GraphicsLayer graphicsLayer = MyMapView.Map.Layers["MyGraphicsLayer"] as GraphicsLayer;
graphicsLayer.Graphics.Clear();
graphicsLayer.Graphics.Add(new Graphic()
{
Geometry = mp
});
var _dataItems = new List <DataItem>();
if (result != null && result.Results != null && result.Results.Count > 0)
{
foreach (var r in result.Results)
{
Feature feature = r.Feature;
string title = r.Value.ToString() + " (" + r.LayerName + ")";
_dataItems.Add(new DataItem()
{
Title = title,
Data = feature.Attributes
});
}
}
TitleComboBox.ItemsSource = _dataItems;
if (_dataItems.Count > 0)
{
TitleComboBox.SelectedIndex = 0;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
finally
{
progress.IsActive = false;
}
}
// Download the tile cache
private async void ExportTilesButton_Click(object sender, RoutedEventArgs e)
{
try
{
panelTOC.Visibility = Visibility.Collapsed;
progress.Visibility = Visibility.Visible;
var downloadOptions = new DownloadTileCacheParameters(ApplicationData.Current.TemporaryFolder)
{
OverwriteExistingFiles = true
};
var localTiledLayer = MyMapView.Map.Layers.FirstOrDefault(lyr => lyr.ID == LOCAL_LAYER_ID);
if (localTiledLayer != null)
{
MyMapView.Map.Layers.Remove(localTiledLayer);
}
var result = await _exportTilesTask.GenerateTileCacheAndDownloadAsync(
_genOptions, downloadOptions, TimeSpan.FromSeconds(5), CancellationToken.None,
new Progress <ExportTileCacheJob>((job) => // Callback for reporting status during tile cache generation
{
Debug.WriteLine(getTileCacheGenerationStatusMessage(job));
}),
new Progress <ExportTileCacheDownloadProgress>((downloadProgress) => // Callback for reporting status during tile cache download
{
Debug.WriteLine(getDownloadStatusMessage(downloadProgress));
}));
localTiledLayer = new ArcGISLocalTiledLayer(result.OutputPath)
{
ID = LOCAL_LAYER_ID
};
MyMapView.Map.Layers.Insert(1, localTiledLayer);
_onlineTiledLayer.IsVisible = false;
if (MyMapView.Scale < _genOptions.MinScale)
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
await MyMapView.SetViewAsync(viewpointExtent.GetCenter(), _genOptions.MinScale);
}
panelTOC.Visibility = Visibility.Visible;
panelExport.Visibility = Visibility.Collapsed;
}
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
finally
{
progress.Visibility = Visibility.Collapsed;
}
}
// Create polyline graphics on the map in the center and the center of four equal quadrants
private void MyMapView_NavigationCompleted(object sender, EventArgs e)
{
MyMapView.NavigationCompleted -= MyMapView_NavigationCompleted;
try
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var myViewpointExtent = viewpointExtent;
var height = myViewpointExtent.Height / 4;
var width = myViewpointExtent.Width / 4;
var length = width / 4;
var center = myViewpointExtent.GetCenter();
var topLeft = new MapPoint(center.X - width, center.Y + height, MyMapView.SpatialReference);
var topRight = new MapPoint(center.X + width, center.Y + height, MyMapView.SpatialReference);
var bottomLeft = new MapPoint(center.X - width, center.Y - height, MyMapView.SpatialReference);
var bottomRight = new MapPoint(center.X + width, center.Y - height, MyMapView.SpatialReference);
var redSymbol = new SimpleLineSymbol()
{
Color = System.Windows.Media.Colors.Red,
Width = 4,
Style = SimpleLineStyle.Solid
};
var blueSymbol = new SimpleLineSymbol()
{
Color = System.Windows.Media.Colors.Blue,
Width = 4,
Style = SimpleLineStyle.Solid
};
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineX(center, length), Symbol = blueSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineX(topLeft, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineX(topRight, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineX(bottomLeft, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolylineX(bottomRight, length), Symbol = redSymbol
});
}
catch (Exception ex)
{
MessageBox.Show("Error occurred : " + ex.Message, "Create Polygons Sample");
}
}
// Accept user map clicks and add points to the graphics layer with the selected symbol
private async Task AcceptPointsAsync()
{
while (MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry.Extent != null)
{
var point = await MyMapView.Editor.RequestPointAsync();
_graphicsOverlay.Graphics.Add(new Graphic(point, _symbols[symbolCombo.SelectedIndex]));
}
}
// Event handler to get information entered by the user and save the map
private async void SaveMapAsync(object sender, SaveMapEventArgs e)
{
// Get the current map
var myMap = MyMapView.Map;
try
{
// Show the progress bar so the user knows work is happening
SaveMapProgressBar.IsVisible = true;
// Make sure the user is logged in to ArcGIS Online
var cred = await EnsureLoggedInAsync();
AuthenticationManager.Current.AddCredential(cred);
// Get information entered by the user for the new portal item properties
var title = e.MapTitle;
var description = e.MapDescription;
var tags = e.Tags;
// Apply the current extent as the map's initial extent
myMap.InitialViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// See if the map has already been saved (has an associated portal item)
if (myMap.Item == null)
{
// Get the ArcGIS Online portal (will use credential from login above)
ArcGISPortal agsOnline = await ArcGISPortal.CreateAsync(new Uri(ArcGISOnlineUrl));
// Save the current state of the map as a portal item in the user's default folder
RuntimeImage img = null;
await myMap.SaveAsAsync(agsOnline, null, title, description, tags, img, false);
// Report a successful save
DisplayAlert("Map Saved", "Saved '" + title + "' to ArcGIS Online!", "OK");
}
else
{
// This is not the initial save, call SaveAsync to save changes to the existing portal item
await myMap.SaveAsync();
// Report update was successful
DisplayAlert("Updates Saved", "Saved changes to '" + myMap.Item.Title + "'", "OK");
}
}
catch (Exception ex)
{
// Show the exception message
DisplayAlert("Unable to save map", ex.Message, "OK");
}
finally
{
// Hide the progress bar
SaveMapProgressBar.IsVisible = false;
}
}
/// <summary>
/// Function used to keep the overlaid preview area marker in position
/// This is called by MyMapView_ViewpointChanged every time the user pans/zooms
/// and updates the red box graphic to outline 80% of the current view
/// </summary>
private void UpdateMapExtentGraphic()
{
// Return if mapview is null.
if (MyMapView == null)
{
return;
}
// Get the new viewpoint.
Viewpoint myViewPoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
// Return if viewpoint is null.
if (myViewPoint == null)
{
return;
}
// Get the updated extent for the new viewpoint.
Envelope extent = myViewPoint.TargetGeometry as Envelope;
// Return if extent is null.
if (extent == null)
{
return;
}
// Create an envelope that is a bit smaller than the extent.
EnvelopeBuilder envelopeBldr = new EnvelopeBuilder(extent);
envelopeBldr.Expand(0.80);
// Get the (only) graphics overlay in the map view.
GraphicsOverlay extentOverlay = MyMapView.GraphicsOverlays.FirstOrDefault();
// Return if the extent overlay is null.
if (extentOverlay == null)
{
return;
}
// Get the extent graphic.
Graphic extentGraphic = extentOverlay.Graphics.FirstOrDefault();
// Create the extent graphic and add it to the overlay if it doesn't exist.
if (extentGraphic == null)
{
extentGraphic = new Graphic(envelopeBldr.ToGeometry());
extentOverlay.Graphics.Add(extentGraphic);
}
else
{
// Otherwise, update the graphic's geometry.
extentGraphic.Geometry = envelopeBldr.ToGeometry();
}
}
// Create four point graphics on the map in the center of four equal quadrants
private void MyMapView_NavigationCompleted(object sender, EventArgs e)
{
MyMapView.NavigationCompleted -= MyMapView_NavigationCompleted;
try
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var myViewpointExtent = viewpointExtent;
var height = myViewpointExtent.Height / 4;
var width = myViewpointExtent.Width / 4;
var center = myViewpointExtent.GetCenter();
var topLeft = new MapPoint(center.X - width, center.Y + height, MyMapView.SpatialReference);
var topRight = new MapPoint(center.X + width, center.Y + height, MyMapView.SpatialReference);
var bottomLeft = new MapPoint(center.X - width, center.Y - height, MyMapView.SpatialReference);
var bottomRight = new MapPoint(center.X + width, center.Y - height, MyMapView.SpatialReference);
var symbol = new SimpleMarkerSymbol()
{
Color = Colors.Red, Size = 15, Style = SimpleMarkerStyle.Diamond
};
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = topLeft, Symbol = symbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = topRight, Symbol = symbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = bottomLeft, Symbol = symbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = bottomRight, Symbol = symbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = new MapPoint(0, 0),
Symbol = new SimpleMarkerSymbol()
{
Size = 15, Color = Colors.Blue
}
});
}
catch (Exception ex)
{
MessageBox.Show("Error occured : " + ex.Message, "Create Points Sample");
}
}
private async void OnExecuteStatisticsQueryClicked(object sender, EventArgs e)
{
// Create definitions for each statistic to calculate
StatisticDefinition statDefinitionAvgPop = new StatisticDefinition("POP", StatisticType.Average, "");
StatisticDefinition statDefinitionMinPop = new StatisticDefinition("POP", StatisticType.Minimum, "");
StatisticDefinition statDefinitionMaxPop = new StatisticDefinition("POP", StatisticType.Maximum, "");
StatisticDefinition statDefinitionSumPop = new StatisticDefinition("POP", StatisticType.Sum, "");
StatisticDefinition statDefinitionStdDevPop = new StatisticDefinition("POP", StatisticType.StandardDeviation, "");
StatisticDefinition statDefinitionVarPop = new StatisticDefinition("POP", StatisticType.Variance, "");
// Create a definition for count that includes an alias for the output
StatisticDefinition statDefinitionCount = new StatisticDefinition("POP", StatisticType.Count, "CityCount");
// Add the statistics definitions to a list
List <StatisticDefinition> statDefinitions = new List <StatisticDefinition>
{
statDefinitionAvgPop,
statDefinitionCount,
statDefinitionMinPop,
statDefinitionMaxPop,
statDefinitionSumPop,
statDefinitionStdDevPop,
statDefinitionVarPop
};
// Create the statistics query parameters, pass in the list of definitions
StatisticsQueryParameters statQueryParams = new StatisticsQueryParameters(statDefinitions);
// If only using features in the current extent, set up the spatial filter for the statistics query parameters
if (OnlyInExtentSwitch.IsToggled)
{
// Get the current extent (envelope) from the map view
Envelope currentExtent = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry).TargetGeometry as Envelope;
// Set the statistics query parameters geometry with the envelope
statQueryParams.Geometry = currentExtent;
// Set the spatial relationship to Intersects (which is the default)
statQueryParams.SpatialRelationship = SpatialRelationship.Intersects;
}
// If only evaluating the largest cities (over 5 million in population), set up an attribute filter
if (OnlyBigCitiesSwitch.IsToggled)
{
// Set a where clause to get the largest cities (could also use "POP_CLASS = '5,000,000 and greater'")
statQueryParams.WhereClause = "POP_RANK = 1";
}
// Execute the statistical query with these parameters and await the results
StatisticsQueryResult statQueryResult = await _worldCitiesTable.QueryStatisticsAsync(statQueryParams);
// Display results in the list box
StatResultsList.ItemsSource = statQueryResult.FirstOrDefault().Statistics.ToList();
ResultsGrid.IsVisible = true;
}
// Estimate local tile cache size / space
private async void EstimateCacheSizeButton_Click(object sender, RoutedEventArgs e)
{
try
{
panelUI.IsEnabled = false;
panelExport.Visibility = Visibility.Collapsed;
panelTOC.Visibility = Visibility.Collapsed;
progress.Visibility = Visibility.Visible;
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
_aoiOverlay.Graphics.Clear();
_aoiOverlay.Graphics.Add(new Graphic(viewpointExtent));
_aoiOverlay.IsVisible = true;
_genOptions = new GenerateTileCacheParameters()
{
Format = ExportTileCacheFormat.TilePackage,
MinScale = _onlineTiledLayer.ServiceInfo.TileInfo.Lods[(int)sliderLOD.Value].Scale,
MaxScale = _onlineTiledLayer.ServiceInfo.TileInfo.Lods[0].Scale,
GeometryFilter = GeometryEngine.Project(viewpointExtent, SpatialReferences.Wgs84)
};
var job = await _exportTilesTask.EstimateTileCacheSizeAsync(_genOptions,
(result, ex) => // Callback for when estimate operation has completed
{
if (ex == null) // Check whether operation completed with errors
{
txtExportSize.Text = string.Format("Tiles: {0} - Size (kb): {1:0}", result.TileCount, result.Size / 1024);
panelExport.Visibility = Visibility.Visible;
panelTOC.Visibility = Visibility.Collapsed;
}
else
{
MessageBox.Show(ex.Message, "Sample Error");
}
panelUI.IsEnabled = true;
progress.Visibility = Visibility.Collapsed;
},
TimeSpan.FromSeconds(1), // Check the operation every five seconds
CancellationToken.None,
new Progress <ExportTileCacheJob>((j) => // Callback for status updates
{
Debug.WriteLine(getTileCacheGenerationStatusMessage(j));
}));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Sample Error");
panelExport.Visibility = Visibility.Visible;
panelTOC.Visibility = Visibility.Collapsed;
}
}
// Utility: Generate a random MapPoint within the current extent
private MapPoint GetRandomMapPoint()
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
double x = viewpointExtent.XMin + (_random.NextDouble() * viewpointExtent.Width);
double y = viewpointExtent.YMin + (_random.NextDouble() * viewpointExtent.Height);
return(new MapPoint(x, y, MyMapView.SpatialReference));
}
/// <summary>
/// Identifies feature to highlight.
/// </summary>
private async void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)
{
// Ignore tap events while in edit mode so we do not interfere with edit geometry.
var inEditMode = EditButton.IsEnabled;
if (inEditMode)
{
return;
}
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var layer = MyMapView.Map.Layers["RecreationalArea"] as ArcGISDynamicMapServiceLayer;
var task = new IdentifyTask(new Uri(layer.ServiceUri));
var mapPoint = MyMapView.ScreenToLocation(e.Position);
var parameter = new IdentifyParameters(mapPoint, viewpointExtent, 2, (int)MyMapView.ActualHeight, (int)MyMapView.ActualWidth);
// Clears map of any highlights.
var overlay = MyMapView.GraphicsOverlays["Highlighter"] as GraphicsOverlay;
overlay.Graphics.Clear();
SetGeometryEditor();
string message = null;
try
{
// Performs an identify and adds feature result as selected into overlay.
var result = await task.ExecuteAsync(parameter);
if (result == null || result.Results == null || result.Results.Count < 1)
{
return;
}
var graphic = (Graphic)result.Results[0].Feature;
graphic.IsSelected = true;
overlay.Graphics.Add(graphic);
// Prepares geometry editor.
var featureID = Convert.ToInt64(graphic.Attributes["Objectid"], CultureInfo.InvariantCulture);
SetGeometryEditor(featureID);
}
catch (Exception ex)
{
message = ex.Message;
}
if (!string.IsNullOrWhiteSpace(message))
{
await new MessageDialog(message).ShowAsync();
}
}
void MyMapView_SpatialReferenceChanged(object sender, EventArgs e)
{
MyMapView.SpatialReferenceChanged -= MyMapView_SpatialReferenceChanged;
try
{
// Get current viewpoints extent from the MapView
var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
var height = viewpointExtent.Height / 4;
var width = viewpointExtent.Width / 4;
var length = width / 4;
var center = viewpointExtent.GetCenter();
var topLeft = new MapPoint(center.X - width, center.Y + height, MyMapView.SpatialReference);
var topRight = new MapPoint(center.X + width, center.Y + height, MyMapView.SpatialReference);
var bottomLeft = new MapPoint(center.X - width, center.Y - height, MyMapView.SpatialReference);
var bottomRight = new MapPoint(center.X + width, center.Y - height, MyMapView.SpatialReference);
var redSymbol = new SimpleFillSymbol()
{
Color = Colors.Red
};
var blueSymbol = new SimpleFillSymbol()
{
Color = Colors.Blue
};
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(center, length), Symbol = blueSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(topLeft, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(topRight, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(bottomLeft, length), Symbol = redSymbol
});
_graphicsOverlay.Graphics.Add(new Graphic()
{
Geometry = CreatePolygonBox(bottomRight, length), Symbol = redSymbol
});
}
catch (Exception ex)
{
var _x = new MessageDialog("Error occurred : " + ex.Message, "Sample Error").ShowAsync();
}
}