为HttpClient Post方法准备Json Object

Question

我试图为Post方法准备一个Json有效负载.服务器无法解析我的数据.我的值上的ToString()方法不能正确地将它转换为Json,请你建议正确的方法.

  var values = new Dictionary<string, string> 
                {
                  {"type", "a"}, {"card", "2"}
                };
  var data = new StringContent(values.ToSttring(), Encoding.UTF8, "application/json");
  HttpClient client = new HttpClient();
  var response = client.PostAsync(myUrl, data).Result;
  using (HttpContent content = response.content) 
  {
      result = response.content.ReadAsStringAsync().Result;
  }

Answer 1

您需要首先使用手动序列化对象 JsonConvert.SerializeObject

var values = new Dictionary<string, string> 
            {
              {"type", "a"}, {"card", "2"}
            };
var json = JsonConvert.SerializeObject(values);
var data = new StringContent(json, Encoding.UTF8, "application/json");

//...code removed for brevity

或者根据您的平台,使用PostAsJsonAsync扩展方法HttpClient.

var values = new Dictionary<string, string> 
            {
              {"type", "a"}, {"card", "2"}
            };
var client = new HttpClient();
using(var response = client.PostAsJsonAsync(myUrl, values).Result) {
    result = response.Content.ReadAsStringAsync().Result;
}