我发现自己使用HttpClient库查询RESTful
API，因为代码非常简单并且完全异步。
（编辑：为了清楚起见，从问题中添加JSON）
{ "agent": {"name": "Agent Name", "version": 1 }, "username": "Username", "password": "User Password", "token": "xxxxxx"}使用两个代表您发布的JSON结构的类，看起来像这样：
public class Credentials{ [JsonProperty("agent")] public Agent Agent { get; set; } [JsonProperty("username")] public string Username { get; set; } [JsonProperty("password")] public string Password { get; set; } [JsonProperty("token")] public string Token { get; set; }}public class Agent{ [JsonProperty("name")] public string Name { get; set; } [JsonProperty("version")] public int Version { get; set; }}您可能有一个像这样的方法，它将执行您的POST请求：
var payload = new Credentials { Agent = new Agent { Name = "Agent Name", Version = 1 }, Username = "Username", Password = "User Password", Token = "xxxxx"};// Serialize our concrete class into a JSON Stringvar stringPayload = await Task.Run(() => JsonConvert.SerializeObject(payload));// Wrap our JSON inside a StringContent which then can be used by the HttpClient classvar httpContent = new StringContent(stringPayload, Encoding.UTF8, "application/json");using (var httpClient = new HttpClient()) { // Do the actual request and await the response var httpResponse = await httpClient.PostAsync("http://localhost/api/path", httpContent); // If the response contains content we want to read it! if (httpResponse.Content != null) { var responseContent = await httpResponse.Content.ReadAsStringAsync(); // From here on you could deserialize the ResponseContent back again to a concrete C# type using Json.Net }}
