Service feature table (cache)

This sample demonstrates how to use a feature service in on interaction cache mode.

ServiceFeatureTable with interaction cache mode

Code

// Copyright 2016 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 Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using System;
using UIKit;

namespace ArcGISRuntimeXamarin.Samples.ServiceFeatureTableCache
{
    [Register("ServiceFeatureTableCache")]
    public class ServiceFeatureTableCache : UIViewController
    {
        // Constant holding offset where the MapView control should start
        private const int yPageOffset = 60;

        // Create and hold reference to the used MapView
        private MapView _myMapView = new MapView();

        public ServiceFeatureTableCache()
        {
            Title = "Service feature table (cache)";
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // Create the UI, setup the control references and execute initialization 
            CreateLayout();
            Initialize();
        }

        public override void ViewDidLayoutSubviews()
        {
            // Setup the visual frame for the MapView
            _myMapView.Frame = new CoreGraphics.CGRect(0, 0, View.Bounds.Width, View.Bounds.Height);
        }

        private void Initialize()
        {
            // Create new Map with basemap
            Map myMap = new Map(Basemap.CreateTopographic());

            // Create and set initial map area
            Envelope initialLocation = new Envelope(
                -1.30758164047166E7, 4014771.46954516, -1.30730056797177E7, 4016869.78617381,
                SpatialReferences.WebMercator);
            myMap.InitialViewpoint = new Viewpoint(initialLocation);

            // Create uri to the used feature service
            var serviceUri = new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/PoolPermits/FeatureServer/0");

            // Create feature table for the pools feature service
            ServiceFeatureTable poolsFeatureTable = new ServiceFeatureTable(serviceUri);

            // Define the request mode
            poolsFeatureTable.FeatureRequestMode = FeatureRequestMode.OnInteractionCache;

            // Create FeatureLayer that uses the created table
            FeatureLayer poolsFeatureLayer = new FeatureLayer(poolsFeatureTable);

            // Add created layer to the map
            myMap.OperationalLayers.Add(poolsFeatureLayer);

            // Assign the map to the MapView
            _myMapView.Map = myMap;

            // Feature table initialization
            poolsFeatureTable.RetryLoadAsync();
        }

        private void CreateLayout()
        {
            // Add MapView to the page
            View.AddSubviews(_myMapView);
        }
    }
}


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