如何使用HttpWebRequest發布數據？

Question

我有這個HttpWebRequest ：

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

但我需要在請求正文中添加一個有效負載，如下所示：

Jlpt = 2

有人可以幫忙告訴我如何向POST添加數據嗎？

Answer 1

你可以做到這一點

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();

但我建議你在這種情況下使用HttpClient而不是HttpWebRequest

Answer 2

if (data != null)
{
    request.ContentType = "application/json";
    using (var stream = new StreamWriter(request.GetRequestStream()))
    {
        var serialized = JsonConvert.SerializeObject(data);
        stream.Write(serialized);
    }
}
else
{
    request.ContentLength = 0;
}

其中data是您要發送的任何對象