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ArcGIS Runtime SDK for .NET

Generate Offline Map (Overrides)

This code sample is available for these platforms:
View Sample on GitHub

Use the OfflineMapTask with overrides to take a webmap offline. The overrides workflow allows you to adjust the settings used for taking each layer in the map offline. For a simple example of how you take a map offline, please consult the "Generate Offline Map" sample.

Image

Use case

For applications where you just need to take all layers offline, use the standard workflow (using only GenerateOfflineMapParameters). For more fine-grained control over the data you are taking offline, use overrides to adjust the settings for each layer (GenerateOfflineMapParameters in conjunction with GenerateOfflineMapParameterOverrides).

Consider using the overrides workflow when you need to:

  • Adjust the extent for one or more layers to be different to the rest of the map.
  • Reduce the amount of data (for example tile data) downloaded for one or more layers in the map.
  • Filter features to be taken offline.
  • Take features with no geometry offline - for example, features whose attributes have been populated in the office, but which need a site survey for their geometry.

How to use the sample

  1. Adjust the min/max levelIds to be taken offline for the Streets basemap.
  2. Set the buffer distance for the streets basemap.
  3. Choose whether to include the System Valves and Service Connections layers.
  4. Specify the minimum flow rate for the features from the Hydrant layer.
  5. Use the button to start the job.
  6. Wait for the progress bar to indicate that the task has completed. The offline map will then be displayed.

How it works

  1. Create a portal item for the web map you want to take offline.
  2. Initialize an OfflineMapTask object with the portal item.
  3. Request the default parameters for the task, with the selected extent, by calling OfflineMapTask.CreateDefaultGenerateOfflineMapParameters.
  4. Create a set of GenerateOfflineMapParameterOverrides by calling OfflineMapTask.CreateGenerateOfflineMapParameterOverrides.
  5. Adjust the various properties of the parameter overrides.

Relevant API

  • OfflineMapTask
  • GenerateGeodatabaseParameters
  • GenerateOfflineMapParameters
  • GenerateOfflineMapParameterOverrides
  • GenerateOfflineMapJob
  • GenerateOfflineMapResult
  • ExportTileCacheParameters

Tags

offline, generate, on-demand

Sample Code

<UserControl
    x:Class="ArcGISRuntime.UWP.Samples.GenerateOfflineMapWithOverrides.GenerateOfflineMapWithOverrides"
    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 x:Name="TakeOfflineArea" Style="{StaticResource BorderStyle}">
            <Grid ColumnSpacing="5" RowSpacing="5">
                <Grid.Resources>
                    <Style TargetType="TextBlock">
                        <Setter Property="Margin" Value="0,0,0,5" />
                    </Style>
                    <Style TargetType="TextBox">
                        <Setter Property="Margin" Value="0,0,0,5" />
                        <Setter Property="VerticalContentAlignment" Value="Center"></Setter>
                    </Style>
                    <Style TargetType="CheckBox">
                        <Setter Property="Margin" Value="0,0,0,5" />
                    </Style>
                    <Style TargetType="Slider">
                        <Setter Property="Margin" Value="0,-8,0,0" />
                        <Setter Property="VerticalAlignment" Value="Center" />
                    </Style>
                </Grid.Resources>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="Auto" />
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>
                <TextBlock Text="Adjust the basemap"
                           FontWeight="SemiBold"
                           Grid.Row="0" Grid.Column="0" />
                <TextBlock Text="Min scale:"
                           Grid.Row="1" Grid.Column="0" />
                <Slider x:Name="MinScaleEntry"
                         Value="0" SnapsTo="StepValues" StepFrequency="1"
                         Minimum="0" Maximum="23"
                         Grid.Row="1" Grid.Column="1" />
                <TextBlock Text="{Binding ElementName=MinScaleEntry,Path=Value}"
                           Grid.Row="1" Grid.Column="2" />
                <TextBlock Text="Max scale:"
                           Grid.Row="2" Grid.Column="0" />
                <Slider x:Name="MaxScaleEntry"
                         Value="23" SnapsTo="StepValues" StepFrequency="1"
                         Minimum="0" Maximum="23"
                         Grid.Row="2" Grid.Column="1" />
                <TextBlock Text="{Binding ElementName=MaxScaleEntry,Path=Value}"
                           Grid.Row="2" Grid.Column="2" />
                <TextBlock Text="Extent buffer distance (m):"
                           Grid.Row="3" Grid.Column="0" />
                <Slider x:Name="ExtentBufferEntry"
                         Value="250" SnapsTo="StepValues" StepFrequency="1"
                         Minimum="0" Maximum="500"
                         Grid.Row="3" Grid.Column="1" />
                <TextBlock Text="{Binding ElementName=ExtentBufferEntry,Path=Value}"
                           Grid.Row="3" Grid.Column="2" />
                <TextBlock Text="Choose layers"
                           FontWeight="SemiBold"
                           Grid.Row="4" Grid.Column="0" />
                <CheckBox x:Name="SysValvesLayerCheckbox"
                          Content="System Valves"
                          IsChecked="True"
                          Grid.Row="5" Grid.Column="0" />
                <CheckBox x:Name="ServiceConnCheckbox"
                          Content="Service Connections"
                          Grid.Row="6" Grid.Column="0" />
                <TextBlock Text="Apply a feature layer filer"
                           FontWeight="SemiBold"
                           Grid.Row="7" Grid.Column="0" />
                <TextBlock Text="Min Hydrant Flow Rate (GPM):"
                           VerticalAlignment="Center"
                           Grid.Row="8" Grid.Column="0" />
                <Slider x:Name="FlowRateFilterEntry"
                         Value="500" SnapsTo="StepValues" StepFrequency="1"
                         Minimum="0" Maximum="999"
                         Margin="0,8,0,0"
                         Grid.Row="8" Grid.Column="1" />
                <TextBlock Text="{Binding ElementName=FlowRateFilterEntry,Path=Value}"
                           Grid.Row="8" Grid.Column="2"
                           VerticalAlignment="Center"
                           MinWidth="25" />
                <TextBlock Text="Crop layer to extent"
                           FontWeight="SemiBold"
                           Grid.Row="9" Grid.Column="0" />
                <CheckBox x:Name="CropLayerCheckbox"
                          Content="Water pipes"
                          IsChecked="True"
                          Grid.Row="10" Grid.Column="0" />
                <Button Content="Take map offline"
                        Grid.Row="11" Grid.Column="0" Grid.ColumnSpan="3"
                        HorizontalAlignment="Stretch"
                        IsEnabled="True" 
                        Click="TakeMapOfflineButton_Click" />
            </Grid>
        </Border>

        <Border x:Name="MessageArea" Visibility="Collapsed"
                Background="White" BorderBrush="Black" BorderThickness="1"
                HorizontalAlignment="Right" VerticalAlignment="Top"
                Margin="30" Padding="5" Width="450">
            <StackPanel>
                <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Margin="10"
                           FontWeight="Bold"
                           Text="Map is offline!" />
            </StackPanel>
        </Border>

        <Grid x:Name="BusyIndicator" Background="#807f7f7f" Visibility="Collapsed">
            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                <Grid.RowDefinitions>
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                </Grid.RowDefinitions>
                <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Margin="10"
                           Foreground="White" FontSize="18">
                    <Run Text="Generating offline map... " />
                    <Run x:Name="Percentage" Text="" />
                </TextBlock>
                <ProgressBar x:Name="ProgressBar"
                             Grid.Row="1"
                             Minimum="0" Maximum="100"
                             IsEnabled="True"
                             HorizontalAlignment="Center" VerticalAlignment="Center"
                             Width="100" Height="10" Margin="0,0,0,10" />
                <Button Grid.Row="2"
                        Content="Cancel"
                        Click="CancelJobButton_Click"
                        HorizontalAlignment="Center"
                        Width="100" />
            </Grid>
        </Grid>
        <Grid x:Name="LoadingIndicator"
              Background="#807f7f7f"
              Visibility="Visible">
            <Grid HorizontalAlignment="Center" VerticalAlignment="Center">
                <Grid.RowDefinitions>
                    <RowDefinition Height="auto" />
                    <RowDefinition Height="auto" />
                </Grid.RowDefinitions>
                <TextBlock Text="Loading online map..."
                           Foreground="White" FontSize="18"
                           Margin="10" />
                <ProgressBar Grid.Row="1"
                             IsEnabled="True" IsIndeterminate="True"
                             Width="100" Height="10"
                             HorizontalAlignment="Center" VerticalAlignment="Center" />
            </Grid>
        </Grid>
    </Grid>
</UserControl>
// Copyright 2019 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.Symbology;
using Esri.ArcGISRuntime.Tasks;
using Esri.ArcGISRuntime.Tasks.Offline;
using Esri.ArcGISRuntime.UI;
using Esri.ArcGISRuntime.ArcGISServices;
using Esri.ArcGISRuntime.UI.Controls;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Windows.UI.Popups;
using Windows.UI.Xaml.Controls;
using Esri.ArcGISRuntime.Portal;
using Esri.ArcGISRuntime.Security;

namespace ArcGISRuntime.UWP.Samples.GenerateOfflineMapWithOverrides
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        "Generate offline map (overrides)",
        "Map",
        "Take a web map offline with additional options for each layer.",
        "")]
    public partial class GenerateOfflineMapWithOverrides
    {
        // The job to generate an offline map.
        private GenerateOfflineMapJob _generateOfflineMapJob;

        // The extent of the data to take offline.
        private Envelope _areaOfInterest = new Envelope(-88.1541, 41.7690, -88.1471, 41.7720, SpatialReferences.Wgs84);

        // The ID for a web map item hosted on the server (water network map of Naperville IL).
        private const string WebMapId = "acc027394bc84c2fb04d1ed317aac674";

        public GenerateOfflineMapWithOverrides()
        {
            InitializeComponent();

            // Load the web map, show area of interest, restrict map interaction, and set up authorization. 
            Initialize();
        }

        private async void Initialize()
        {
            try
            {
                // Call a function to set up the AuthenticationManager for OAuth.
                SetOAuthInfo();

                // Create the ArcGIS Online portal.
                ArcGISPortal portal = await ArcGISPortal.CreateAsync();

                // Get the Naperville water web map item using its ID.
                PortalItem webmapItem = await PortalItem.CreateAsync(portal, WebMapId);

                // Create a map from the web map item.
                Map onlineMap = new Map(webmapItem);

                // Display the map in the MapView.
                MyMapView.Map = onlineMap;

                // Disable user interactions on the map (no panning or zooming from the initial extent).
                MyMapView.InteractionOptions = new MapViewInteractionOptions
                {
                    IsEnabled = false
                };

                // Create a graphics overlay for the extent graphic and apply a renderer.
                SimpleLineSymbol aoiOutlineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.Red, 3);
                GraphicsOverlay extentOverlay = new GraphicsOverlay
                {
                    Renderer = new SimpleRenderer(aoiOutlineSymbol)
                };
                MyMapView.GraphicsOverlays.Add(extentOverlay);

                // Add a graphic to show the area of interest (extent) that will be taken offline.
                Graphic aoiGraphic = new Graphic(_areaOfInterest);
                extentOverlay.Graphics.Add(aoiGraphic);

                // Hide the map loading progress indicator.
                LoadingIndicator.Visibility = Windows.UI.Xaml.Visibility.Collapsed;

                // Clean up any existing output data folders that might exist from running this sample previously. 
                // The output data folder is where the results of the taking the web map offline get stored on the device.
                MyMapView.Unloaded += (s, e) =>
                {
                    // Find output mobile map folders in the temp directory.
                    string[] outputFolders = Directory.GetDirectories(Environment.ExpandEnvironmentVariables("%TEMP%"), "NapervilleWaterNetwork*");

                    // Loop through the folder names and delete them.
                    foreach (string dir in outputFolders)
                    {
                        try
                        {
                            // Delete the folder.
                            Directory.Delete(dir, true);
                        }
                        catch (Exception)
                        {
                            // Ignore exceptions (files might be locked, for example).
                        }
                    }
                };
            }
            catch (Exception ex)
            {
                MessageDialog dialog = new MessageDialog(ex.ToString(), "Error loading map");
                await dialog.ShowAsync();
            }
        }

        private async void TakeMapOfflineButton_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
        {
            // Create a new folder for the output mobile map.
            string packagePath = Path.Combine(Environment.ExpandEnvironmentVariables("%TEMP%"), @"NapervilleWaterNetwork");
            int num = 1;
            while (Directory.Exists(packagePath))
            {
                packagePath = Path.Combine(Environment.ExpandEnvironmentVariables("%TEMP%"), @"NapervilleWaterNetwork" + num.ToString());
                num++;
            }

            // Create the output directory.
            Directory.CreateDirectory(packagePath);

            try
            {
                // Show the progress indicator while the job is running.
                BusyIndicator.Visibility = Windows.UI.Xaml.Visibility.Visible;

                // Create an offline map task with the current (online) map.
                OfflineMapTask takeMapOfflineTask = await OfflineMapTask.CreateAsync(MyMapView.Map);

                // Create the default parameters for the task, pass in the area of interest.
                GenerateOfflineMapParameters parameters = await takeMapOfflineTask.CreateDefaultGenerateOfflineMapParametersAsync(_areaOfInterest);

                #region overrides

                // Generate parameter overrides for more in-depth control of the job.
                GenerateOfflineMapParameterOverrides overrides = await takeMapOfflineTask.CreateGenerateOfflineMapParameterOverridesAsync(parameters);

                // Configure the overrides using helper methods.
                ConfigureTileLayerOverrides(overrides);
                ConfigureLayerExclusion(overrides);
                CropWaterPipes(overrides);
                ApplyFeatureFilter(overrides);

                // Create the job with the parameters and output location.
                _generateOfflineMapJob = takeMapOfflineTask.GenerateOfflineMap(parameters, packagePath, overrides);

                #endregion overrides

                // Handle the progress changed event for the job.
                _generateOfflineMapJob.ProgressChanged += OfflineMapJob_ProgressChanged;

                // Await the job to generate geodatabases, export tile packages, and create the mobile map package.
                GenerateOfflineMapResult results = await _generateOfflineMapJob.GetResultAsync();

                // Check for job failure (writing the output was denied, e.g.).
                if (_generateOfflineMapJob.Status != JobStatus.Succeeded)
                {
                    MessageDialog dialog = new MessageDialog("Generate offline map package failed.", "Job status");
                    await dialog.ShowAsync();
                    BusyIndicator.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
                }

                // Check for errors with individual layers.
                if (results.LayerErrors.Any())
                {
                    // Build a string to show all layer errors.
                    System.Text.StringBuilder errorBuilder = new System.Text.StringBuilder();
                    foreach (KeyValuePair<Layer, Exception> layerError in results.LayerErrors)
                    {
                        errorBuilder.AppendLine(string.Format("{0} : {1}", layerError.Key.Id, layerError.Value.Message));
                    }

                    // Show layer errors.
                    string errorText = errorBuilder.ToString();
                    MessageDialog dialog = new MessageDialog(errorText, "Layer errors");
                    await dialog.ShowAsync();
                }

                // Display the offline map.
                MyMapView.Map = results.OfflineMap;

                // Apply the original viewpoint for the offline map.
                MyMapView.SetViewpoint(new Viewpoint(_areaOfInterest));

                // Enable map interaction so the user can explore the offline data.
                MyMapView.InteractionOptions.IsEnabled = true;

                // Hide the "Take map offline" button.
                TakeOfflineArea.Visibility = Windows.UI.Xaml.Visibility.Collapsed;

                // Show a message that the map is offline.
                MessageArea.Visibility = Windows.UI.Xaml.Visibility.Visible;
            }
            catch (TaskCanceledException)
            {
                // Generate offline map task was canceled.
                MessageDialog dialog = new MessageDialog("Taking map offline was canceled");
                await dialog.ShowAsync();
            }
            catch (Exception ex)
            {
                // Exception while taking the map offline.
                MessageDialog dialog = new MessageDialog(ex.Message, "Offline map error");
                await dialog.ShowAsync();
            }
            finally
            {
                // Hide the activity indicator when the job is done.
                BusyIndicator.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
            }
        }

        #region overrides

        private void ConfigureTileLayerOverrides(GenerateOfflineMapParameterOverrides overrides)
        {
            // Create a parameter key for the first basemap layer.
            OfflineMapParametersKey basemapKey = new OfflineMapParametersKey(MyMapView.Map.Basemap.BaseLayers.First());

            // Get the export tile cache parameters for the layer key.
            ExportTileCacheParameters basemapParams = overrides.ExportTileCacheParameters[basemapKey];

            // Clear the existing level IDs.
            basemapParams.LevelIds.Clear();

            // Get the min and max scale from the UI.
            int minScale = (int)MinScaleEntry.Value;
            int maxScale = (int)MaxScaleEntry.Value;

            // Re-add selected scales.
            for (int i = minScale; i < maxScale; i++)
            {
                basemapParams.LevelIds.Add(i);
            }

            // Expand the area of interest based on the specified buffer distance.
            int bufferDistance = (int)ExtentBufferEntry.Value;
            basemapParams.AreaOfInterest = GeometryEngine.BufferGeodetic(_areaOfInterest, bufferDistance, LinearUnits.Meters);
        }

        private void ConfigureLayerExclusion(GenerateOfflineMapParameterOverrides overrides)
        {
            // Apply layer exclusions as specified in the UI.
            if (ServiceConnCheckbox.IsChecked == false)
            {
                ExcludeLayerByName("Service Connection", overrides);
            }

            if (SysValvesLayerCheckbox.IsChecked == false)
            {
                ExcludeLayerByName("System Valve", overrides);
            }
        }

        private void CropWaterPipes(GenerateOfflineMapParameterOverrides overrides)
        {
            if (CropLayerCheckbox.IsChecked == true)
            {
                // Get the ID of the water pipes layer.
                long targetLayerId = GetServiceLayerId(GetLayerByName("Main"));

                // For each layer option.
                foreach (GenerateLayerOption layerOption in GetAllLayerOptions(overrides))
                {
                    // If the option's LayerId matches the selected layer's ID.
                    if (layerOption.LayerId == targetLayerId)
                    {
                        layerOption.UseGeometry = true;
                    }
                }
            }
        }

        private void ApplyFeatureFilter(GenerateOfflineMapParameterOverrides overrides)
        {
            // For each layer option.
            foreach (GenerateLayerOption option in GetAllLayerOptions(overrides))
            {
                // If the option's LayerId matches the selected layer's ID.
                if (option.LayerId == GetServiceLayerId(GetLayerByName("Hydrant")))
                {
                    // Apply the where clause.
                    option.WhereClause = "FLOW >= " + (int)FlowRateFilterEntry.Value;

                    // Configure the option to use the where clause.
                    option.QueryOption = GenerateLayerQueryOption.UseFilter;
                }
            }
        }

        private IList<GenerateLayerOption> GetAllLayerOptions(GenerateOfflineMapParameterOverrides overrides)
        {
            // Find the first feature layer.
            FeatureLayer targetLayer = MyMapView.Map.OperationalLayers.OfType<FeatureLayer>().First();

            // Get the key for the layer.
            OfflineMapParametersKey layerKey = new OfflineMapParametersKey(targetLayer);

            // Use that key to get the generate options for the layer.
            GenerateGeodatabaseParameters generateParams = overrides.GenerateGeodatabaseParameters[layerKey];

            // Return the layer options.
            return generateParams.LayerOptions;
        }

        private void ExcludeLayerByName(string layerName, GenerateOfflineMapParameterOverrides overrides)
        {
            // Get the feature layer with the specified name.
            FeatureLayer targetLayer = GetLayerByName(layerName);

            // Get the layer's ID.
            long targetLayerId = GetServiceLayerId(targetLayer);

            // Create a layer key for the selected layer.
            OfflineMapParametersKey layerKey = new OfflineMapParametersKey(targetLayer);

            // Get the parameters for the layer.
            GenerateGeodatabaseParameters generateParams = overrides.GenerateGeodatabaseParameters[layerKey];

            // Get the layer options for the layer.
            IList<GenerateLayerOption> layerOptions = generateParams.LayerOptions;

            // Find the layer option matching the ID.
            GenerateLayerOption targetLayerOption = layerOptions.First(layer => layer.LayerId == targetLayerId);

            // Remove the layer option.
            layerOptions.Remove(targetLayerOption);
        }

        private FeatureLayer GetLayerByName(string layerName)
        {
            // Get the first map in the operational layers collection that is a feature layer with name matching layerName
            return MyMapView.Map.OperationalLayers.OfType<FeatureLayer>().First(layer => layer.Name == layerName);
        }

        private long GetServiceLayerId(FeatureLayer layer)
        {
            // Find the service feature table for the layer; this assumes the layer is backed by a service feature table.
            ServiceFeatureTable serviceTable = (ServiceFeatureTable) layer.FeatureTable;

            // Return the layer ID.
            return serviceTable.LayerInfo.ServiceLayerId;
        }

        #endregion overrides

        // Show changes in job progress.
        private async void OfflineMapJob_ProgressChanged(object sender, EventArgs e)
        {
            // Get the job.
            GenerateOfflineMapJob job = sender as GenerateOfflineMapJob;

            // Dispatch to the UI thread.
            await Dispatcher.RunAsync( Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
            {
                // Show the percent complete and update the progress bar.
                Percentage.Text = job.Progress > 0 ? job.Progress.ToString() + " %" : string.Empty;
                ProgressBar.Value = job.Progress;
            });
        }

        private void CancelJobButton_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
        {
            // The user canceled the job.
            _generateOfflineMapJob.Cancel();
        }

        #region Authentication
        // Constants for OAuth-related values.
        // - The URL of the portal to authenticate with (ArcGIS Online).
        private const string ServerUrl = "https://www.arcgis.com/sharing/rest";
        // - The Client ID for an app registered with the server (the ID below is for a public app created by the ArcGIS Runtime team).
        private const string AppClientId = @"lgAdHkYZYlwwfAhC";
        // - An optional client secret for the app (only needed for the OAuthAuthorizationCode authorization type).
        private const string ClientSecret = "";
        // - A URL for redirecting after a successful authorization (this must be a URL configured with the app).
        private const string OAuthRedirectUrl = @"my-ags-app://auth";

        private void SetOAuthInfo()
        {
            // Register the server information with the AuthenticationManager.
            ServerInfo serverInfo = new ServerInfo
            {
                ServerUri = new Uri(ServerUrl),
                TokenAuthenticationType = TokenAuthenticationType.OAuthImplicit,
                OAuthClientInfo = new OAuthClientInfo
                {
                    ClientId = AppClientId,
                    RedirectUri = new Uri(OAuthRedirectUrl)
                }
            };

            // Register this server with AuthenticationManager.
            AuthenticationManager.Current.RegisterServer(serverInfo);

            // Use a function in this class to challenge for credentials.
            AuthenticationManager.Current.ChallengeHandler = new ChallengeHandler(CreateCredentialAsync);

            // Note: In a WPF app, you need to associate a custom IOAuthAuthorizeHandler component with the AuthenticationManager to 
            //     handle showing OAuth login controls (AuthenticationManager.Current.OAuthAuthorizeHandler = new MyOAuthAuthorize();).
            //     The UWP AuthenticationManager, however, uses a built-in IOAuthAuthorizeHandler (based on WebAuthenticationBroker).
        }

        public async Task<Credential> CreateCredentialAsync(CredentialRequestInfo info)
        {
            // ChallengeHandler function for AuthenticationManager that will be called whenever a secured resource is accessed.
            Credential credential = null;

            try
            {
                // AuthenticationManager will handle challenging the user for credentials.
                credential = await AuthenticationManager.Current.GenerateCredentialAsync(info.ServiceUri);
            }
            catch (Exception)
            {
                // Exception will be reported in calling function.
                throw;
            }

            return credential;
        }
        #endregion
    }
}