Items = JsonSerializer.Deserialize>(content, _serializerOptions) ĭata is received from the web service as a HttpResponseMessage object. HttpResponseMessage response = await _client.GetAsync(uri) Uri uri = new Uri(string.Format(Constants.RestUrl, string.Empty)) The HttpClient.GetAsync method is used to send a GET request to the web service specified by the URI, and then receive the response from the web service: public async Task> RefreshDataAsync() For more information, see How to instantiate JsonSerializerOptions instances with. The JsonSerializerOptions object is used to configure the formatting of the JSON payload that's received from and sent to the web service. PropertyNamingPolicy = JsonNamingPolicy.CamelCase, _serializerOptions = new JsonSerializerOptions JsonSerializerOptions _serializerOptions The HttpClient object should be declared at the class-level so that it lives for as long as the app needs to make HTTP requests: public class RestService : IRestService Each request is sent as an asynchronous operation. This class provides functionality for sending HTTP requests and receiving HTTP responses from a URI identified resource. ![]() NET Multi-platform App UI (.NET MAUI) app can consume a REST-based web service by sending requests to the web service with the HttpClient class. For more information about building the REST service using ASP.NET Core, see Creating backend services for native mobile applications. For more information about attribute routing, see Attribute routing for REST APIs. Attribute routing uses a set of attributes to map actions directly to route templates. REST APIs should use attribute routing to model the app's functionality as a set of resources whose operations are represented by HTTP verbs. The Web API framework uses routing middleware to match the URLs of incoming requests and map them to actions. These actions are public methods in the TodoItemsController class. NET MAUI app sends a DELETE request to When the Web API framework receives a request, it routes the request to an action. For example, to delete the TodoItem whose ID is 6bb8a868-dba1-4f1a-93b7-24ebce87e243, the. The ID property is used to uniquely identify each TodoItem object, and is used by the web service to identify data to be updated or deleted. NET MAUI app and web service uses the TodoItem class to model the data that is displayed and sent to the web service for storage: public class TodoItem The example REST service is written using ASP.NET Core and provides the following operations: Operation The simplicity of REST has helped make it the primary method for accessing web services in mobile apps. JSON is a text-based data-interchange format that produces compact payloads, which results in reduced bandwidth requirements when sending data. REST-based web services typically use JSON messages to return data to the client.
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