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GeoElementAttributes Property

Gets the attributes of this GeoElement as a collection of name/value pairs.

Namespace:  Esri.ArcGISRuntime.Data
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version: 100.9.0.0
Syntax
C#
public IDictionary<string, Object> Attributes { get; }

Property Value

Type: IDictionaryString, Object
All attributes of the geo element.
Remarks
There are limitations on the types of values that can be stored. Types that can be stored are String, Guid, DateTime, DateTimeOffset, Boolean, Single, Double, and most integral types (signed and unsigned Int16, Int32, and Int64). Attempting to set a value of any other type will result in an ArgumentException.
Examples

Android

Example Name: AddFeatures

Add features to a feature layer.

Code example screen shot.

C#
// Copyright 2019 Esri.
// 
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an 
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific 
// language governing permissions and limitations under the License.

using Android.App;
using Android.OS;
using Android.Views;
using Android.Widget;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using System;

namespace ArcGISRuntimeXamarin.Samples.AddFeatures
{
    [Activity (ConfigurationChanges=Android.Content.PM.ConfigChanges.Orientation | Android.Content.PM.ConfigChanges.ScreenSize)]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Add features",
        category: "Data",
        description: "Add features to a feature layer.",
        instructions: "Tap on a location on the map to add a feature at that location.",
        tags: new[] { "edit", "feature", "online service" })]
    public class AddFeatures : Activity
    {
        // Hold a reference to the MapView.
        private MapView _myMapView;

        // URL to the feature service.
        private const string FeatureServiceUrl = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0";

        // Hold a reference to the feature table.
        private ServiceFeatureTable _damageFeatureTable;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            Title = "Add features (feature service)";

            CreateLayout();
            Initialize();
        }

        private void Initialize()
        {
            // Create the map with streets basemap.
            _myMapView.Map = new Map(Basemap.CreateStreets());

            // Create the feature table, referring to the Damage Assessment feature service.
            _damageFeatureTable = new ServiceFeatureTable(new Uri(FeatureServiceUrl));

            // Create a feature layer to visualize the features in the table.
            FeatureLayer damageLayer = new FeatureLayer(_damageFeatureTable);

            // Add the layer to the map.
            _myMapView.Map.OperationalLayers.Add(damageLayer);

            // Listen for user taps on the map - this will select the feature.
            _myMapView.GeoViewTapped += MapView_Tapped;

            // Zoom to the United States.
            _myMapView.SetViewpointCenterAsync(new MapPoint(-10800000, 4500000, SpatialReferences.WebMercator), 3e7);
        }

        private async void MapView_Tapped(object sender, GeoViewInputEventArgs e)
        {
            try
            {
                // Create the feature.
                ArcGISFeature feature = (ArcGISFeature) _damageFeatureTable.CreateFeature();

                // Get the normalized geometry for the tapped location and use it as the feature's geometry.
                MapPoint tappedPoint = (MapPoint) GeometryEngine.NormalizeCentralMeridian(e.Location);
                feature.Geometry = tappedPoint;

                // Set feature attributes.
                feature.SetAttributeValue("typdamage", "Minor");
                feature.SetAttributeValue("primcause", "Earthquake");

                // Add the feature to the table.
                await _damageFeatureTable.AddFeatureAsync(feature);

                // Apply the edits to the service.
                await _damageFeatureTable.ApplyEditsAsync();

                // Update the feature to get the updated objectid - a temporary ID is used before the feature is added.
                feature.Refresh();

                // Confirm feature addition.
                ShowMessage($"Created feature {feature.Attributes["objectid"]}", "Success!");
            }
            catch (Exception ex)
            {
                ShowMessage(ex.ToString(), "Error adding feature");
            }
        }

        private void ShowMessage(string message, string title)
        {
            // Display the message to the user.
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.SetMessage(message).SetTitle(title).Show();
        }


        private void CreateLayout()
        {
            // Create a new vertical layout for the app.
            var layout = new LinearLayout(this) {Orientation = Orientation.Vertical};

            // Create the MapView.
            _myMapView = new MapView(this);

            // Create the help label.
            TextView helpLabel = new TextView(this);
            helpLabel.Text = "Tap to add features.";
            helpLabel.TextAlignment = TextAlignment.Center;
            helpLabel.Gravity = GravityFlags.Center;

            // Add the help label to the layout.
            layout.AddView(helpLabel);

            // Add the map view to the layout.
            layout.AddView(_myMapView);

            // Show the layout in the app.
            SetContentView(layout);
        }
    }
}
Examples

Xamarin Forms Android

Example Name: AddFeatures

Add features to a feature layer.

Code example screen shot.

C#
// Copyright 2019 Esri.
// 
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
// You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an 
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific 
// language governing permissions and limitations under the License.

using System;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Xamarin.Forms;

namespace ArcGISRuntimeXamarin.Samples.AddFeatures
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Add features",
        category: "Data",
        description: "Add features to a feature layer.",
        instructions: "Tap on a location on the map to add a feature at that location.",
        tags: new[] { "edit", "feature", "online service" })]
    public partial class AddFeatures : ContentPage
    {
        // URL to the feature service.
        private const string FeatureServiceUrl = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0";

        // Hold a reference to the feature table.
        private ServiceFeatureTable _damageFeatureTable;

        public AddFeatures()
        {
            InitializeComponent();
            Initialize();
        }

        private void Initialize()
        {
            // Create the map with streets basemap.
            MyMapView.Map = new Map(Basemap.CreateStreets());

            // Create the feature table, referring to the Damage Assessment feature service.
            _damageFeatureTable = new ServiceFeatureTable(new Uri(FeatureServiceUrl));

            // Create a feature layer to visualize the features in the table.
            FeatureLayer damageLayer = new FeatureLayer(_damageFeatureTable);

            // Add the layer to the map.
            MyMapView.Map.OperationalLayers.Add(damageLayer);

            // Listen for user taps on the map - this will select the feature.
            MyMapView.GeoViewTapped += MapView_Tapped;

            // Zoom to the United States.
            MyMapView.SetViewpointCenterAsync(new MapPoint(-10800000, 4500000, SpatialReferences.WebMercator), 3e7);
        }

        private async void MapView_Tapped(object sender, Esri.ArcGISRuntime.Xamarin.Forms.GeoViewInputEventArgs e)
        {
            try
            {
                // Create the feature.
                ArcGISFeature feature = (ArcGISFeature) _damageFeatureTable.CreateFeature();

                // Get the normalized geometry for the tapped location and use it as the feature's geometry.
                MapPoint tappedPoint = (MapPoint) GeometryEngine.NormalizeCentralMeridian(e.Location);
                feature.Geometry = tappedPoint;

                // Set feature attributes.
                feature.SetAttributeValue("typdamage", "Minor");
                feature.SetAttributeValue("primcause", "Earthquake");

                // Add the feature to the table.
                await _damageFeatureTable.AddFeatureAsync(feature);

                // Apply the edits to the service.
                await _damageFeatureTable.ApplyEditsAsync();

                // Update the feature to get the updated objectid - a temporary ID is used before the feature is added.
                feature.Refresh();

                // Confirm feature addition.
                await Application.Current.MainPage.DisplayAlert("Success!", $"Created feature {feature.Attributes["objectid"]}", "OK");
            }
            catch (Exception ex)
            {
                await Application.Current.MainPage.DisplayAlert("Error adding feature", ex.ToString(), "OK");
            }
        }
    }
}
XAML
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"             
             xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms"
             xmlns:mapping="clr-namespace:Esri.ArcGISRuntime.Mapping;assembly=Esri.ArcGISRuntime" 
             x:Class="ArcGISRuntimeXamarin.Samples.AddFeatures.AddFeatures">
  <Grid>
    <esriUI:MapView x:Name="MyMapView"/>
  </Grid>
</ContentPage>
See Also
Additional Examples
Hyperlink to ExampleDescription
AddFeaturesAdd features to a feature layer.
Animate3DGraphicAn `OrbitGeoElementCameraController` follows a graphic while the graphic's position and rotation are animated.
BufferListGenerate multiple individual buffers or a single unioned buffer around multiple points.
ConvexHullCreate a convex hull for a given set of points. The convex hull is a polygon with shortest perimeter that encloses a set of points. As a visual analogy, consider a set of points as nails in a board. The convex hull of the points would be like a rubber band stretched around the outermost nails.
DeleteFeaturesDelete features from an online feature service.
DictionaryRendererGraphicsOverlayThis sample demonstrates applying a dictionary renderer to graphics, in order to display military symbology without the need for a feature table.
DisplayUtilityAssociationsCreate graphics for utility associations in a utility network.
FindPlaceFind places of interest near a location or within a specific area.
FindServiceAreaFind the service area within a network from a given point.
IdentifyRasterCellGet the cell value of a local raster at the tapped location and display the result in a callout.
ListGeodatabaseVersionsConnect to a service and list versions of the geodatabase.
ListRelatedFeaturesList features related to the selected feature.
ScenePropertiesExpressionsUpdate the orientation of a graphic using expressions based on its attributes.
UpdateAttributesUpdate feature attributes in an online feature service.
UpdateGeometriesUpdate a feature's location in an online feature service.
ViewshedGeoElementAnalyze the viewshed for an object (GeoElement) in a scene.
WmsIdentifyIdentify features in a WMS layer and display the associated popup content.