如何使用 HttpWebRequest 发布数据？

我有这个HttpWebRequest:

var request = HttpWebRequest.Create("http://example.com/api/Phrase/GetJDTO");
request.ContentType = "application/json";
request.Method = "POST";

但我需要向请求正文添加有效负载，如下所示：

Jlpt = 2

有人可以帮助告诉我如何将数据添加到 POST 中吗？

你可以这样做

var request = HttpWebRequest.Create("http://example.com/api/Phrase/GetJDTO");

var postData = "Jlpt = 2";
var data = Encoding.ASCII.GetBytes(postData);

request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;

using (var stream = request.GetRequestStream())
{
    stream.Write(data, 0, data.Length);
}

var response = (HttpWebResponse)request.GetResponse();

var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

但我建议你使用HttpClient而不是HttpWebRequest在这种情况下