ArcGISRuntimeXamarin.Samples.RenderUniqueValues.RenderUniqueValues.Initialize C# (CSharp) Метод

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

            // Create uri to the used feature service
            var serviceUri = new Uri(
                "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3");

            // Create service feature table
            ServiceFeatureTable statesFeatureTable = new ServiceFeatureTable(serviceUri);

            // Create a new feature layer using the service feature table
            FeatureLayer statesLayer = new FeatureLayer(statesFeatureTable);

            // Create a new unique value renderer
            UniqueValueRenderer regionRenderer = new UniqueValueRenderer();

            // Add the "SUB_REGION" field to the renderer
            regionRenderer.FieldNames.Add("SUB_REGION");

            // Define a line symbol to use for the region fill symbols
            SimpleLineSymbol stateOutlineSymbol = new SimpleLineSymbol(
                SimpleLineSymbolStyle.Solid, System.Drawing.Color.White, 0.7);

            // Define distinct fill symbols for a few regions (use the same outline symbol)
            SimpleFillSymbol pacificFillSymbol = new SimpleFillSymbol(
                SimpleFillSymbolStyle.Solid, System.Drawing.Color.Blue, stateOutlineSymbol);
            SimpleFillSymbol mountainFillSymbol = new SimpleFillSymbol(
                SimpleFillSymbolStyle.Solid, System.Drawing.Color.LawnGreen, stateOutlineSymbol);
            SimpleFillSymbol westSouthCentralFillSymbol = new SimpleFillSymbol(
                SimpleFillSymbolStyle.Solid, System.Drawing.Color.SandyBrown, stateOutlineSymbol);

            // Add values to the renderer: define the label, description, symbol, and attribute value for each
            regionRenderer.UniqueValues.Add(
                new UniqueValue("Pacific", "Pacific Region", pacificFillSymbol, "Pacific"));
            regionRenderer.UniqueValues.Add(
                new UniqueValue("Mountain", "Rocky Mountain Region", mountainFillSymbol, "Mountain"));
            regionRenderer.UniqueValues.Add(
                new UniqueValue("West South Central", "West South Central Region", westSouthCentralFillSymbol, "West South Central"));

            // Set the default region fill symbol (transparent with no outline) for regions not explicitly defined in the renderer
            SimpleFillSymbol defaultFillSymbol = new SimpleFillSymbol(
                SimpleFillSymbolStyle.Null, System.Drawing.Color.Transparent, null);
            regionRenderer.DefaultSymbol = defaultFillSymbol;
            regionRenderer.DefaultLabel = "Other";

            // Apply the unique value renderer to the states layer
            statesLayer.Renderer = regionRenderer;

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

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