Create and save map

View inAndroidFormsUWPWPFWinUIiOSView on GitHub

Create and save a map as an ArcGIS PortalItem (i.e. web map).

Image of create and save map

Use case

Maps can be created programmatically in code and then serialized and saved as an ArcGIS web map. A web map can be shared with others and opened in various applications and APIs throughout the platform, such as ArcGIS Pro, ArcGIS Online, the JavaScript API, Collector, and Explorer.

How to use the sample

  1. Select the basemap and layers you'd like to add to your map.
  2. Press the Save button.
  3. Sign into an ArcGIS Online account.
  4. Provide a title, tags, and description.
  5. Save the map.

How it works

  1. A Map is created with a Basemap and a few operational layers.
  2. A Portal object is created and loaded. This will issue an authentication challenge, prompting the user to provide credentials.
  3. Once the user is authenticated, map.SaveAsAsync is called and a new Map is saved with the specified title, tags, and folder.

Relevant API

  • AuthenticationManager
  • ChallengeHandler
  • GenerateCredentialAsync
  • IOAuthAuthorizeHandler
  • Map
  • Map.SaveAsAsync
  • Portal

Tags

ArcGIS Online, OAuth, portal, publish, share, web map

Sample Code

ArcGISLoginPrompt.csArcGISLoginPrompt.csAuthorMap.cs
Use dark colors for code blocksCopy
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
// 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.Security;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using UIKit;
using Xamarin.Essentials;

namespace ArcGISRuntime.Helpers
{
    internal static class ArcGISLoginPrompt
    {
        private const string ArcGISOnlineUrl = "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).
        public const string AppClientId = @"IBkBd7YYFHOzPIIO";

        // - An optional client secret for the app (only needed for the OAuthClientCredentials authorization type).
        private const string ClientSecret = "";

        // - A URL for redirecting after a successful authorization (this must be a URL configured with the app).
        // NOTE: to use a custom URL scheme like the one below, you need to add it to CFBundleURLSchemes in info.plist.
        // For example -
        //  <key>CFBundleURLSchemes</key>
        //  <array>
        //  	<string>my-ags-app</string>
        //  </array>
        private const string OAuthRedirectUrl = @"xamarin-ios-app://auth";

        public static async Task<bool> EnsureAGOLCredentialAsync()
        {
            bool loggedIn = false;

            try
            {
                // Create a challenge request for portal credentials (OAuth credential request for arcgis.com)
                CredentialRequestInfo challengeRequest = new CredentialRequestInfo
                {
                    // Use the OAuth authorization code workflow.
                    GenerateTokenOptions = new GenerateTokenOptions
                    {
                        TokenAuthenticationType = TokenAuthenticationType.OAuthAuthorizationCode
                    },

                    // Indicate the url (portal) to authenticate with (ArcGIS Online)
                    ServiceUri = new Uri(ArcGISOnlineUrl)
                };

                // Call GetCredentialAsync on the AuthenticationManager to invoke the challenge handler
                Credential cred = await AuthenticationManager.Current.GetCredentialAsync(challengeRequest, false);
                loggedIn = cred != null;
            }
            catch (OperationCanceledException)
            {
                // OAuth login was canceled, no need to display error to user.
            }
            catch (Exception ex)
            {
                new UIAlertView("Login failed", ex.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
            }

            return loggedIn;
        }

        public static void SetChallengeHandler(UIViewController controller)
        {
            // Define the server information for ArcGIS Online
            ServerInfo portalServerInfo = new ServerInfo(new Uri(ArcGISOnlineUrl))
            {
                TokenAuthenticationType = TokenAuthenticationType.OAuthAuthorizationCode,
                OAuthClientInfo = new OAuthClientInfo(AppClientId, new Uri(OAuthRedirectUrl))
            };

            // If a client secret has been configured, set the authentication type to OAuth client credentials.
            if (!string.IsNullOrEmpty(ClientSecret))
            {
                // If a client secret is specified then use the TokenAuthenticationType.OAuthClientCredentials type.
                portalServerInfo.TokenAuthenticationType = TokenAuthenticationType.OAuthClientCredentials;
                portalServerInfo.OAuthClientInfo.ClientSecret = ClientSecret;
            }

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

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

            // Set the OAuthAuthorizeHandler component (this class).
            AuthenticationManager.Current.OAuthAuthorizeHandler = new OAuthAuthorize(controller);
        }

        // ChallengeHandler function that will be called whenever access to a secured resource is attempted.
        public static async Task<Credential> PromptCredentialAsync(CredentialRequestInfo info)
        {
            Credential credential = null;

            try
            {
                // IOAuthAuthorizeHandler will challenge the user for OAuth credentials.
                credential = await AuthenticationManager.Current.GenerateCredentialAsync(info.ServiceUri);
            }
            // OAuth login was canceled, no need to display error to user.
            catch (TaskCanceledException) { }
            catch (OperationCanceledException) { }

            return credential;
        }
    }

    public class OAuthAuthorize : IOAuthAuthorizeHandler
    {
        // Use a TaskCompletionSource to track the completion of the authorization.
        private TaskCompletionSource<IDictionary<string, string>> _taskCompletionSource;

        private UIViewController _viewController;

        public OAuthAuthorize(UIViewController activity)
        {
            _viewController = activity;
        }

        // IOAuthAuthorizeHandler.AuthorizeAsync implementation.
        public async Task<IDictionary<string, string>> AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
        {
            try
            {
                // Create a task completion source.
                _taskCompletionSource = new TaskCompletionSource<IDictionary<string, string>>();

                // Start the authentication on the UI thread.
                _viewController.BeginInvokeOnMainThread(async () =>
                {
                    try
                    {
                        var result = await WebAuthenticator.AuthenticateAsync(authorizeUri, callbackUri);
                        _taskCompletionSource.SetResult(result.Properties);
                    }
                    catch (Exception ex)
                    {
                        _taskCompletionSource.TrySetException(ex);
                    }
                });
                return await _taskCompletionSource.Task;
            }
            catch (Exception) { }

            // Return null if anything goes wrong with authentication.
            return null;
        }
    }
}

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.