Smallest example I could think of using HttpClient.GetAsync() with Generics.
using System; using System.Collections.Generic; using System.Net.Http; using System.Threading.Tasks; using Newtonsoft.Json; namespace AsyncHttpClient { /// <summary> /// Tiny example of using HttpClient.GetAsync() with Generics. /// Uses the REST API calls from the most excellent mysafeinfo.com for presidents and Beatles albums /// This prints: /// Requesting presidents /// Requesting Beatles albums /// ... waiting ... /// first president = number: '1','', party: '', term: '' /// first Beatles album = album name: 'Please Please Me (Mono)', date: '1963-03-22T00:00:00' /// </summary> public class President { public int president; public string name, party, term; public override string ToString() { return $"number: '{president}','{name}', party: '{party}', term: '{term}'"; } } public class BeatlesAlbum { public string album, date; public override string ToString() { return $"album name: '{album}', date: '{date}'"; } } class AsyncHttpClientExample { private static void Main() { string presidentsUrl = "https://mysafeinfo.com/api/data?list=presidents&format=json"; string beatlesUrl = "https://mysafeinfo.com/api/data?list=beatlesalbums&format=json&select=ent,typ,rd&alias=ent=artist,typ=album,rd=date"; var asyncHttpClientExample = new AsyncHttpClientExample(); Console.Out.WriteLine("Requesting presidents"); var presidents = asyncHttpClientExample.GetAsync<List<President>>(presidentsUrl); Console.Out.WriteLine("Requesting Beatles albums"); var albums = asyncHttpClientExample.GetAsync<List<BeatlesAlbum>>(beatlesUrl); Console.Out.WriteLine("... waiting ..."); Console.Out.WriteLine("first president = {0}", presidents.Result[0]); Console.Out.WriteLine("first Beatles album = {0}", albums.Result[0]); } private async Task<T> GetAsync<T>(string url) { HttpClient client = new HttpClient(new HttpClientHandler()); HttpResponseMessage response = await client.GetAsync(url).ConfigureAwait(false); var jsonString = response.Content.ReadAsStringAsync().Result; T result = JsonConvert.DeserializeObject<T>(jsonString); return result; } } }
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