C#请求http向网页发送接收数据的方法

static void Main(string[] args)
{
  string result = Post("http://localhost:5534/Home/ToUrl", "家庭");
  Console.WriteLine(result);
  Console.ReadKey();
}
/// <summary> 
    /// 指定Post地址使用Get 方式获取全部字符串 
    /// </summary> 
    /// <param name="url">请求后台地址</param> 
    /// <param name="content">Post提交数据内容(utf-8编码的)</param> 
    /// <returns>结果</returns> 
    public static string Post(string url, string content)
    {
      //申明一个容器result接收数据
      string result = "";
      //首先创建一个HttpWebRequest,申明传输方式POST
      HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
      req.Method = "POST";
      req.ContentType = "application/x-www-form-urlencoded";

      //添加POST参数
      byte[] data = Encoding.UTF8.GetBytes(content);
      req.ContentLength = data.Length;
      using (Stream reqStream = req.GetRequestStream())
      {
        reqStream.Write(data, 0, data.Length);
        reqStream.Close();
      }

      //申明一个容器resp接收返回数据
      HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
      Stream stream = resp.GetResponseStream();
      //获取响应内容 
      using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
      {
        result = reader.ReadToEnd();
      }
      return result;
    }

public ActionResult ToUrl()
    {
      string result = "";
      string jsonStr = "", line;
      try
      {

        Stream streamResponse = Request.InputStream;
        StreamReader streamRead = new StreamReader(streamResponse, Encoding.UTF8);

        while ((line = streamRead.ReadLine()) != null)
        {
          jsonStr += line;
        }
        streamResponse.Close();
        streamRead.Close();

        result = jsonStr;
      }
      catch (Exception ex)
      {
        result = "msg-数据发布（In）异常：" + ex.Message;
      }
      Service service = new Service();
      //调用AddCatagorys方法，把数据添加进去
      service.AddCatagorys(result);
      //再调用GetCatas方法，获取到分类列表
      List<Catagory> list = service.GetCatagories();
      //找到分类列表最后一个分类，也就是刚刚添加的分类
      Catagory catagory = list[list.Count - 1];
      //返回Json
      //return Json(catagory)

      //返回一个ID，Content()里面是string类型，所以要把int转为string类型
      return Content(catagory.ID.ToString());
    }