![\"\"](\"https:\/\/mvc.auctionpro.co.kr\/wp-content\/uploads\/2021\/04\/SystemNetHttpJsonSamples.jpg\")
<\/p>\n<\/p>\n
using Newtonsoft.Json;\r\nusing System;\r\nusing System.IO;\r\nusing System.Net.Http;\r\nusing System.Net.Http.Json;\r\nusing System.Threading.Tasks;\r\nusing System.Collections.Generic;\r\n\r\nnamespace SystemNetHttpJsonSamples\r\n{\r\n partial class Program\r\n { \r\n static async Task Main()\r\n {\r\n const string validUserUri = \"https:\/\/example.com\/users\/1\";\r\n const string postUserUri = \"https:\/\/example.com\/users\";\r\n\r\n var httpClient = new HttpClient(new FakeEndpointHandler());\r\n\r\n User user = null;\r\n\r\n user = await InefficientStringApproach(validUserUri, httpClient);\r\n\r\n user = await StreamWithNewtonsoftJson(validUserUri, httpClient);\r\n\r\n user = await WebApiClient(validUserUri, httpClient);\r\n\r\n user = await StreamWithSystemTextJson(validUserUri, httpClient);\r\n\r\n user = await GetJsonHttpClient(validUserUri, httpClient);\r\n\r\n user = await GetJsonFromContent(validUserUri, httpClient);\r\n\r\n await PostJsonHttpClient(postUserUri, httpClient);\r\n\r\n await PostJsonContent(postUserUri, httpClient);\r\n\r\n _ = Console.ReadLine();\r\n }\r\n\r\n private static async Task<User> InefficientStringApproach(string uri, HttpClient httpClient)\r\n {\r\n var httpResponse = await httpClient.GetAsync(uri);\r\n\r\n if (httpResponse.Content is object && httpResponse.Content.Headers.ContentType.MediaType == \"application\/json\")\r\n {\r\n var jsonString = await httpResponse.Content.ReadAsStringAsync();\r\n\r\n \/\/Console.WriteLine(\"OK\");\r\n\r\n return JsonConvert.DeserializeObject<User>(jsonString);\r\n }\r\n else\r\n {\r\n Console.WriteLine(\"HTTP Response was invalid and cannot be deserialised.\");\r\n }\r\n\r\n return null;\r\n }\r\n\r\n private static async Task<User> StreamWithNewtonsoftJson(string uri, HttpClient httpClient)\r\n {\r\n using var httpResponse = await httpClient.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead);\r\n\r\n httpResponse.EnsureSuccessStatusCode(); \/\/ throws if not 200-299\r\n\r\n if (httpResponse.Content is object && httpResponse.Content.Headers.ContentType.MediaType == \"application\/json\")\r\n {\r\n var contentStream = await httpResponse.Content.ReadAsStreamAsync();\r\n\r\n using var streamReader = new StreamReader(contentStream);\r\n using var jsonReader = new JsonTextReader(streamReader);\r\n\r\n JsonSerializer serializer = new JsonSerializer();\r\n\r\n try\r\n {\r\n return serializer.Deserialize<User>(jsonReader);\r\n }\r\n catch(JsonReaderException)\r\n {\r\n Console.WriteLine(\"Invalid JSON.\");\r\n } \r\n }\r\n else\r\n {\r\n Console.WriteLine(\"HTTP Response was invalid and cannot be deserialised.\");\r\n }\r\n\r\n return null;\r\n }\r\n\r\n private static async Task<User> WebApiClient(string uri, HttpClient httpClient)\r\n {\r\n using var httpResponse = await httpClient.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead);\r\n\r\n httpResponse.EnsureSuccessStatusCode(); \/\/ throws if not 200-299\r\n\r\n try\r\n {\r\n return await httpResponse.Content.ReadAsAsync<User>();\r\n }\r\n catch \/\/ Could be ArgumentNullException or UnsupportedMediaTypeException\r\n {\r\n Console.WriteLine(\"HTTP Response was invalid or could not be deserialised.\");\r\n }\r\n\r\n return null;\r\n }\r\n\r\n private static async Task<User> StreamWithSystemTextJson(string uri, HttpClient httpClient)\r\n {\r\n using var httpResponse = await httpClient.GetAsync(uri, HttpCompletionOption.ResponseHeadersRead);\r\n\r\n httpResponse.EnsureSuccessStatusCode(); \/\/ throws if not 200-299\r\n\r\n if (httpResponse.Content is object && httpResponse.Content.Headers.ContentType.MediaType == \"application\/json\")\r\n {\r\n var contentStream = await httpResponse.Content.ReadAsStreamAsync();\r\n\r\n try\r\n {\r\n return await System.Text.Json.JsonSerializer.DeserializeAsync<User>(contentStream, new System.Text.Json.JsonSerializerOptions { IgnoreNullValues = true, PropertyNameCaseInsensitive = true });\r\n }\r\n catch (JsonException) \/\/ Invalid JSON\r\n {\r\n Console.WriteLine(\"Invalid JSON.\");\r\n } \r\n }\r\n else\r\n {\r\n Console.WriteLine(\"HTTP Response was invalid and cannot be deserialised.\");\r\n }\r\n\r\n return null;\r\n }\r\n\r\n private static async Task<User> GetJsonHttpClient(string uri, HttpClient httpClient)\r\n {\r\n try\r\n {\r\n var user = await httpClient.GetFromJsonAsync<User>(uri);\r\n\r\n return user;\r\n }\r\n catch (HttpRequestException) \/\/ Non success\r\n {\r\n Console.WriteLine(\"An error occurred.\");\r\n }\r\n catch (NotSupportedException) \/\/ When content type is not valid\r\n {\r\n Console.WriteLine(\"The content type is not supported.\");\r\n }\r\n catch (JsonException) \/\/ Invalid JSON\r\n {\r\n Console.WriteLine(\"Invalid JSON.\");\r\n }\r\n \r\n return null;\r\n }\r\n\r\n private static async Task<User> GetJsonFromContent(string uri, HttpClient httpClient)\r\n {\r\n var request = new HttpRequestMessage(HttpMethod.Get, uri);\r\n request.Headers.TryAddWithoutValidation(\"some-header\", \"some-value\");\r\n\r\n using var response = await httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);\r\n\r\n if (response.IsSuccessStatusCode)\r\n {\r\n \/\/ perhaps check some headers before deserialising\r\n \r\n try\r\n {\r\n return await response.Content.ReadFromJsonAsync<User>();\r\n }\r\n catch (NotSupportedException) \/\/ When content type is not valid\r\n {\r\n Console.WriteLine(\"The content type is not supported.\");\r\n }\r\n catch (JsonException) \/\/ Invalid JSON\r\n {\r\n Console.WriteLine(\"Invalid JSON.\");\r\n }\r\n }\r\n\r\n return null;\r\n }\r\n\r\n private static async Task PostJsonHttpClient(string uri, HttpClient httpClient)\r\n {\r\n var postUser = new User { Name = \"Steve Gordon\" };\r\n\r\n var postResponse = await httpClient.PostAsJsonAsync(uri, postUser);\r\n\r\n postResponse.EnsureSuccessStatusCode();\r\n }\r\n\r\n private static async Task PostJsonContent(string uri, HttpClient httpClient)\r\n {\r\n var postUser = new User { Name = \"Steve Gordon\" };\r\n\r\n var postRequest = new HttpRequestMessage(HttpMethod.Post, uri)\r\n {\r\n Content = JsonContent.Create(postUser)\r\n };\r\n\r\n var postResponse = await httpClient.SendAsync(postRequest);\r\n\r\n postResponse.EnsureSuccessStatusCode();\r\n }\r\n }\r\n}\r\n<\/pre>\nnamespace SystemNetHttpJsonSamples\r\n{\r\n public class Address\r\n {\r\n public string Street { get; set; }\r\n public string City { get; set; }\r\n public string Postcode { get; set; }\r\n public Geo Geo { get; set; }\r\n }\r\n}\r\n<\/pre>\nnamespace SystemNetHttpJsonSamples\r\n{\r\n public class Company\r\n {\r\n public string Name { get; set; }\r\n public string CatchPhrase { get; set; }\r\n }\r\n}\r\n<\/pre>\nusing System.Net.Http;\r\nusing System.Text;\r\nusing System.Threading;\r\nusing System.Threading.Tasks;\r\n\r\nnamespace SystemNetHttpJsonSamples\r\n{\r\n partial class Program\r\n {\r\n internal class FakeEndpointHandler : DelegatingHandler\r\n {\r\n protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)\r\n {\r\n HttpResponseMessage responseMessage = null;\r\n\r\n if (request.Method == HttpMethod.Get && request.RequestUri.AbsolutePath == \"\/users\/1\")\r\n {\r\n responseMessage = new HttpResponseMessage(System.Net.HttpStatusCode.OK)\r\n {\r\n Content = new StringContent(\"{\\\"id\\\":1,\\\"name\\\":\\\"Steve Gordon\\\",\\\"username\\\":\\\"stevejgordon\\\",\\\"email\\\":\\\"stevejgordon@example.com\\\",\\\"address\\\":{\\\"street\\\":\\\"1 Madeup Place\\\",\\\"city\\\":\\\"Sometown\\\",\\\"postcode\\\":\\\"AA1 1AA\\\",\\\"geo\\\":{\\\"lat\\\":\\\"0.0000\\\",\\\"lng\\\":\\\"0.0000\\\"}},\\\"phone\\\":\\\"00000 000000\\\",\\\"website\\\":\\\"stevejgordon.co.uk\\\",\\\"company\\\":{\\\"name\\\":\\\"An Impressive Name\\\",\\\"catchPhrase\\\":\\\"Building .NET Code everyday!\\\"}}\", Encoding.UTF8, \"application\/json\")\r\n };\r\n }\r\n\r\n if (request.Method == HttpMethod.Get && request.RequestUri.AbsolutePath == \"\/users\/2\")\r\n {\r\n responseMessage = new HttpResponseMessage(System.Net.HttpStatusCode.NotFound);\r\n }\r\n\r\n if (request.Method == HttpMethod.Post && request.RequestUri.AbsolutePath == \"\/users\")\r\n {\r\n responseMessage = new HttpResponseMessage(System.Net.HttpStatusCode.Created);\r\n }\r\n\r\n return Task.FromResult(responseMessage);\r\n }\r\n }\r\n }\r\n}\r\n<\/pre>\nnamespace SystemNetHttpJsonSamples\r\n{\r\n public class User\r\n {\r\n public int Id { get; set; }\r\n public string Name { get; set; }\r\n public string Username { get; set; }\r\n public string Email { get; set; }\r\n public Address Address { get; set; }\r\n public string Phone { get; set; }\r\n public string Website { get; set; }\r\n public Company Company { get; set; }\r\n }\r\n}\r\n<\/pre>\nnamespace SystemNetHttpJsonSamples\r\n{\r\n public class Geo\r\n {\r\n public string Lat { get; set; }\r\n public string Lng { get; set; }\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"Remark : Console with Http and Json using Newtonsoft.Json; using System; using System.IO; using System.Net.Http; using System.Net.Http.Json; using System.Threading.Tasks; using System.Collections.Generic; namespace SystemNetHttpJsonSamples { partial class Program { static async Task Main() { const string validUserUri = “https:\/\/example.com\/users\/1”; const string postUserUri = “https:\/\/example.com\/users”; var httpClient = new HttpClient(new FakeEndpointHandler()); User user = null; user =\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-251","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/pages\/251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=251"}],"version-history":[{"count":1,"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/pages\/251\/revisions"}],"predecessor-version":[{"id":253,"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=\/wp\/v2\/pages\/251\/revisions\/253"}],"wp:attachment":[{"href":"https:\/\/mvc.auctionpro.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}