Create and save a map as an ArcGIS PortalItem (i.e. web 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
Select the basemap and layers you'd like to add to your map.
Press the Save button.
Sign into an ArcGIS Online account.
Provide a title, tags, and description.
Save the map.
How it works
A Map is created with a Basemap and a few operational layers.
A Portal object is created and loaded. This will issue an authentication challenge, prompting the user to provide credentials.
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
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// 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.Threading.Tasks;
using Xamarin.Forms;
#if __ANDROID__ || __IOS__using Xamarin.Essentials;
using System.Collections.Generic;
#endif#if __ANDROID__using Android.App;
using Application = Xamarin.Forms.Application;
using Android.Content;
using Android.Content.PM;
#endifnamespaceForms.Helpers{
internalstaticclassArcGISLoginPrompt {
privateconststring 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).publicconststring AppClientId = @"6wMAmbUEX1rvsOb4";
// - An optional client secret for the app (only needed for the OAuthClientCredentials authorization type).privateconststring ClientSecret = "";
// - A URL for redirecting after a successful authorization (this must be a URL configured with the app).privateconststring OAuthRedirectUrl = @"forms-samples-app://auth";
publicstaticasync 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)
{
await Application.Current.MainPage.DisplayAlert("Login failed", ex.Message, "OK");
}
return loggedIn;
}
publicstaticvoidSetChallengeHandler() {
// 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) for Android or iOS platforms.#if __ANDROID__ || __IOS__ AuthenticationManager.Current.OAuthAuthorizeHandler = new OAuthAuthorize();
#endif }
// ChallengeHandler function that will be called whenever access to a secured resource is attempted.publicstaticasync 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;
}
}
#region IOAuthAuthorizationHandler implementation#if __ANDROID__ || __IOS__publicclassOAuthAuthorize : IOAuthAuthorizeHandler {
// Use a TaskCompletionSource to track the completion of the authorization.private TaskCompletionSource<IDictionary<string, string>> _taskCompletionSource;
// IOAuthAuthorizeHandler.AuthorizeAsync implementation.publicasync Task<IDictionary<string, string>> AuthorizeAsync(Uri serviceUri, Uri authorizeUri, Uri callbackUri)
{
try {
_taskCompletionSource = new TaskCompletionSource<IDictionary<string, string>>();
#if __IOS__ Device.BeginInvokeOnMainThread(async () =>
{
#endiftry {
var result = await WebAuthenticator.AuthenticateAsync(authorizeUri, callbackUri);
_taskCompletionSource.SetResult(result.Properties);
}
catch (Exception ex)
{
_taskCompletionSource.TrySetException(ex);
}
#if __IOS__ });
#endifreturnawait _taskCompletionSource.Task;
}
catch (Exception) { }
returnnull;
}
}
#endif#if __ANDROID__ [Activity(NoHistory = true, Exported = true, LaunchMode = LaunchMode.SingleTop)]
[IntentFilter(new[] { Intent.ActionView },
Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable },
DataScheme = "forms-samples-app", DataHost = "auth")]
publicclassWebAuthenticationCallbackActivity : WebAuthenticatorCallbackActivity {
}
#endif#endregion IOAuthAuthorizationHandler implementation}