找不到如何使用HttpContent

Question

我正在尝试使用HttpContent：

HttpContent myContent = HttpContent.Create(SOME_JSON);

...但我没有任何运气找到定义它的DLL。

首先，我尝试添加对微软的引用。Http以及系统。Net，但两者都不在列表中。我还尝试添加对系统的引用。网Http但HttpContent类不可用。

那么，谁能告诉我在哪里可以找到HttpContent类？

Answer 1

对于JSON帖子：

var stringContent = new StringContent(json, Encoding.UTF8, "application/json");
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

非JSON：

var stringContent = new FormUrlEncodedContent(new[]
{
    new KeyValuePair<string, string>("field1", "value1"),
    new KeyValuePair<string, string>("field2", "value2"),
});
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

https://blog.pedrofelix.org/2012/01/16/the-new-system-net-http-classes-message-content/

Answer 2

要获取6footunder的评论并将其转化为答案，HttpContent是抽象的，因此您需要使用其中一个派生类：

Answer 3

就用。。。

var stringContent = new StringContent(jObject.ToString());
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);

或

var stringContent = new StringContent(JsonConvert.SerializeObject(model), Encoding.UTF8, "application/json");
var response = await httpClient.PostAsync("http://www.sample.com/write", stringContent);