Open map URL

<UserControl
    x:Class="ArcGIS.UWP.Samples.OpenMapURL.OpenMapURL"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:esriUI="using:Esri.ArcGISRuntime.UI.Controls">
    <Grid>
        <esriUI:MapView x:Name="MyMapView" />
        <Border Style="{StaticResource BorderStyle}">
            <StackPanel>
                <TextBlock Text="Select a map."
                           TextAlignment="Center" FontWeight="SemiBold" />
                <ComboBox x:Name="MapList"
                          HorizontalAlignment="Stretch"
                          SelectionChanged="MapSelectionChanged" />
            </StackPanel>
        </Border>
    </Grid>
</UserControl>

// Copyright 2021 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.Mapping;
using System;
using Windows.UI.Xaml.Controls;

namespace ArcGIS.UWP.Samples.OpenMapURL
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Open map URL",
        category: "Map",
        description: "Display a web map.",
        instructions: "A web map can be selected from the drop-down list. On selection the web map displays in the map view.",
        tags: new[] { "portal item", "web map" })]
    public partial class OpenMapURL
    {
        // String array to hold urls to publicly available web maps.
        private string[] _itemURLs = {
            "https://arcgis.com/home/item.html?id=92ad152b9da94dee89b9e387dfe21acd",
            "https://arcgis.com/home/item.html?id=5be0bc3ee36c4e058f7b3cebc21c74e6",
            "https://arcgis.com/home/item.html?id=064f2e898b094a17b84e4a4cd5e5f549"
        };

        // String array to store titles for the webmaps specified above.
        private string[] _titles = {
            "Geology for United States",
            "Terrestrial Ecosystems of the World",
            "Recent Hurricanes, Cyclones and Typhoons"
        };

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

        private void Initialize()
        {
            // Set titles as a items source.
            MapList.ItemsSource = _titles;

            // Select the first option in the map titles.
            MapList.SelectedIndex = 0;

            // Show the first webmap by default.
            MyMapView.Map = new Map(new Uri(_itemURLs[0]));
        }

        private void MapSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            // Create a new Map instance with url of the webmap that selected.
            MyMapView.Map = new Map(new Uri(_itemURLs[MapList.SelectedIndex]));
        }
    }
}