c# - 帖子响应没有预期的数据

Question

下面是我的一个 Controller 的简单操作方法:

[HttpPost]
public async Task<dynamic> UnitTest()
{
    var httpClient = new HttpClient();
    dynamic model1 = new ExpandoObject();
    model1.title = "foo";
    model1.body = "bar";
    model1.userId = 1;
    var request = JsonConvert.SerializeObject(model1);
    var url = "https://jsonplaceholder.typicode.com/posts";
    var response = await httpClient.PostAsync(url, 
        new StringContent(request, Encoding.UTF8, "application/json"));
    return response;
}

我希望 response 包含一个像

这样的对象

{
  id: 101,
  title: 'foo',
  body: 'bar',
  userId: 1
}

根据 https://github.com/typicode/jsonplaceholder#how-to .相反，response 是一个具有以下属性的对象:

Content (empty)
StatusCode: 201
ReasonPhrase: "Created"
Version: 1.1

我做错了什么？

Answer 1

response.Content 是流内容，你应该在返回操作之前先读取流。

var content = await response.Content.ReadAsStringAsync();

完成 Action 的样子；

[HttpPost]
public async Task<string> UnitTest()
{
    var httpClient = new HttpClient();
    dynamic model1 = new ExpandoObject();
    model1.title = "foo";
    model1.body = "bar";
    model1.userId = 1;
    var request = JsonConvert.SerializeObject(model1);
    var url = "https://jsonplaceholder.typicode.com/posts";
    var response = await httpClient.PostAsync(url, 
        new StringContent(request, Encoding.UTF8, "application/json"));
    var content = await response.Content.ReadAsStringAsync();
    return content;
}

此外，最好将返回的 json 反序列化为已知类型。