从 asp.net C# 调用外部 json webservice

我需要从 C# Asp.net 调用 json Web 服务。该服务返回一个 json 对象，并且 web 服务想要的 json 数据如下所示：

"data" : "my data"

这是我想出的，但我无法理解如何将数据添加到我的请求中并发送它，然后解析我返回的 json 数据。

string data = "test";
Uri address = new Uri("http://localhost/Service.svc/json");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(address);
request.Method = "POST";
request.ContentType = "application/json; charset=utf-8";
string postData = "{\"data\":\"" + data + "\"}";

如何将 json 数据添加到我的请求中，然后解析响应？

Use the JavaScript序列化器，反序列化/解析数据。您可以使用以下方式获取数据：

// corrected to WebRequest from HttpWebRequest
WebRequest request = WebRequest.Create("http://localhost/service.svc/json");

request.Method="POST";
request.ContentType = "application/json; charset=utf-8";
string postData = "{\"data\":\"" + data + "\"}"; //encode your data 
                                               //using the javascript serializer

//get a reference to the request-stream, and write the postData to it
using(Stream s = request.GetRequestStream())
{
    using(StreamWriter sw = new StreamWriter(s))
        sw.Write(postData);
}

//get response-stream, and use a streamReader to read the content
using(Stream s = request.GetResponse().GetResponseStream())
{
    using(StreamReader sr = new StreamReader(s))
    {
        var jsonData = sr.ReadToEnd();
        //decode jsonData with javascript serializer
    }
}