FeatureLayerRenderingModeMap.xaml.cs

// Copyright 2017 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 System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Xamarin.Forms;

namespace ArcGISRuntime.Samples.FeatureLayerRenderingModeMap
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        "Feature layer rendering mode (Map)",
        "Layers",
        "This sample demonstrates how to use load settings to set preferred rendering mode for feature layers, specifically static or dynamic rendering modes.",
        "")]
    public partial class FeatureLayerRenderingModeMap : ContentPage
    {
        // Viewpoint locations for map view to zoom in and out to.
        private Viewpoint _zoomOutPoint = new Viewpoint(new MapPoint(-118.37, 34.46, SpatialReferences.Wgs84), 650000, 0);
        private Viewpoint _zoomInPoint = new Viewpoint(new MapPoint(-118.45, 34.395, SpatialReferences.Wgs84), 50000, 90);

        public FeatureLayerRenderingModeMap()
        {
            InitializeComponent();

            // Setup the control references and execute initialization 
            Initialize();
        }

        private void Initialize()
        {
            // Create service feature table using a point, polyline, and polygon service.
            ServiceFeatureTable pointServiceFeatureTable = new ServiceFeatureTable(new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/0"));
            ServiceFeatureTable polylineServiceFeatureTable = new ServiceFeatureTable(new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/8"));
            ServiceFeatureTable polygonServiceFeatureTable = new ServiceFeatureTable(new Uri("https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/9"));

            // Create feature layers from service feature tables
            List<FeatureLayer> featureLayers = new List<FeatureLayer>
            {
                new FeatureLayer(pointServiceFeatureTable),
                new FeatureLayer(polylineServiceFeatureTable),
                new FeatureLayer(polygonServiceFeatureTable)
            };

            // Add each layer to the map as a static layer and a dynamic layer
            foreach (FeatureLayer layer in featureLayers)
            {
                // Add the static layer to the top map view
                layer.RenderingMode = FeatureRenderingMode.Static;
                MyMapViewTop.Map.OperationalLayers.Add(layer);

                // Add the dynamic layer to the bottom map view
                FeatureLayer dynamicLayer = (FeatureLayer)layer.Clone();
                dynamicLayer.RenderingMode = FeatureRenderingMode.Dynamic;
                MyMapViewBottom.Map.OperationalLayers.Add(dynamicLayer);
            }

            // Set the view point of both MapViews.
            MyMapViewTop.SetViewpoint(_zoomOutPoint);
            MyMapViewBottom.SetViewpoint(_zoomOutPoint);
        }

        private async void OnZoomClick(object sender, EventArgs e)
        {
            try
            {
                // Initiate task to zoom both map views in.  
                Task t1 = MyMapViewTop.SetViewpointAsync(_zoomInPoint, TimeSpan.FromSeconds(5));
                Task t2 = MyMapViewBottom.SetViewpointAsync(_zoomInPoint, TimeSpan.FromSeconds(5));
                await Task.WhenAll(t1, t2);

                // Delay start of next set of zoom tasks.
                await Task.Delay(2000);

                // Initiate task to zoom both map views out. 
                Task t3 = MyMapViewTop.SetViewpointAsync(_zoomOutPoint, TimeSpan.FromSeconds(5));
                Task t4 = MyMapViewBottom.SetViewpointAsync(_zoomOutPoint, TimeSpan.FromSeconds(5));
                await Task.WhenAll(t3, t4);
            }
            catch (Exception ex)
            {
                await ((Page)Parent).DisplayAlert("Error", ex.ToString(), "OK");
            }
        }
    }
}