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GeometryBuilderTToGeometry Method

Returns a Geometry instance representing the current state of the builder

Namespace:  Esri.ArcGISRuntime.Geometry
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version: 100.9.0
Syntax
public virtual T ToGeometry()

Return Value

Type: T
Geometry
Examples

WPF

Example Name: IdentifyGraphics

Display an alert message when a graphic is clicked.

Code example screen shot.

C#
// 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 System;
using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.Geometry;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.UI;
using Esri.ArcGISRuntime.UI.Controls;
using System.Windows;
using System.Drawing;

namespace ArcGISRuntime.WPF.Samples.IdentifyGraphics
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Identify graphics",
        category: "GraphicsOverlay",
        description: "Display an alert message when a graphic is clicked.",
        instructions: "Select a graphic to identify it. You will see an alert message displayed.",
        tags: new[] { "graphics", "identify" })]
    public partial class IdentifyGraphics
    {
        // Graphics overlay to host graphics
        private GraphicsOverlay _polygonOverlay;

        public IdentifyGraphics()
        {
            InitializeComponent();

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

        private void Initialize()
        {
            // Create a map with 'Imagery with Labels' basemap and an initial location
            Map myMap = new Map(Basemap.CreateTopographic());

            // Create graphics overlay with graphics
            CreateOverlay();

            // Hook into tapped event
            MyMapView.GeoViewTapped += OnMapViewTapped;

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

        private void CreateOverlay()
        {
            // Create polygon builder and add polygon corners into it
            PolygonBuilder builder = new PolygonBuilder(SpatialReferences.WebMercator);
            builder.AddPoint(new MapPoint(-20e5, 20e5));
            builder.AddPoint(new MapPoint(20e5, 20e5));
            builder.AddPoint(new MapPoint(20e5, -20e5));
            builder.AddPoint(new MapPoint(-20e5, -20e5));

            // Get geometry from the builder
            Polygon polygonGeometry = builder.ToGeometry();

            // Create symbol for the polygon
            SimpleFillSymbol polygonSymbol = new SimpleFillSymbol(
                SimpleFillSymbolStyle.Solid,
                Color.Yellow,
                null);

            // Create new graphic
            Graphic polygonGraphic = new Graphic(polygonGeometry, polygonSymbol);

            // Create overlay to where graphics are shown
            _polygonOverlay = new GraphicsOverlay();
            _polygonOverlay.Graphics.Add(polygonGraphic);

            // Add created overlay to the MapView
            MyMapView.GraphicsOverlays.Add(_polygonOverlay);
        }

        private async void OnMapViewTapped(object sender, GeoViewInputEventArgs e)
        {
            double tolerance = 10d; // Use larger tolerance for touch
            int maximumResults = 1; // Only return one graphic  
            bool onlyReturnPopups = false; // Return more than popups

            try
            {
                // Use the following method to identify graphics in a specific graphics overlay
                IdentifyGraphicsOverlayResult identifyResults = await MyMapView.IdentifyGraphicsOverlayAsync(
                    _polygonOverlay,
                    e.Position,
                    tolerance,
                    onlyReturnPopups,
                    maximumResults);

                // Check if we got results
                if (identifyResults.Graphics.Count > 0)
                {
                    //  Display to the user the identify worked.
                    MessageBox.Show("Tapped on graphic", "");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Error");
            }
        }
    }
}
XAML
<UserControl x:Class="ArcGISRuntime.WPF.Samples.IdentifyGraphics.IdentifyGraphics"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013">
    <Grid>
        <esri:MapView x:Name="MyMapView" />
        <Border Style="{StaticResource BorderStyle}">
            <TextBlock Text="Tap to identify the graphic."
                       FontWeight="SemiBold" HorizontalAlignment="Center" />
        </Border>
    </Grid>
</UserControl>
See Also
Additional Examples
Hyperlink to ExampleDescription
BufferListGenerate multiple individual buffers or a single unioned buffer around multiple points.
ChangeBlendRendererBlend a hillshade with a raster by specifying the elevation data. The resulting raster looks similar to the original raster, but with some terrain shading, giving it a textured look.
EditAndSyncFeaturesSynchronize offline edits with a feature service.
ExportTilesDownload tiles to a local tile cache file stored on the device.
FeatureLayerQueryFind features in a feature table which match an SQL query.
FindRouteDisplay directions for a route between two points.
GenerateGeodatabaseGenerate a local geodatabase from an online feature service.
IdentifyGraphicsDisplay an alert message when a graphic is clicked.
ShowLocationHistoryDisplay your location history on the map.