[网络协议]C#带参数发送http请求，接收返回cookie

/// <summary>
/// 登录,返回获取到的cookie
/// </summary>         
public static string Login()
{
	string cookie_ck = string.Empty;
	try
	{
		string url = "http://10.122.66.157/api/user/userLogin";
		string sendData = "code=01&login=[\"10.192.111.79\",\"hhs\",\"hhs\"]&sql=[\"lhd\",\"1234567qwe\"]";
		System.Net.HttpWebRequest httpRquest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
		httpRquest.Method = "POST";
		
		//获取response的cookie必须设置
		httpRquest.CookieContainer = new System.Net.CookieContainer();

		//string referer = "http://10.122.66.157/home/login.html";
		//httpRquest.Headers.Add("Referer", referer);
		//httpRquest.Headers.Add("Origin", "http://10.122.66.157");

		//这行代码很关键，不设置ContentType将导致后台参数获取不到值
		httpRquest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";
		System.IO.Stream requestStream = null;
		if (!string.IsNullOrWhiteSpace(sendData))
		{
			byte[] dataArray = System.Text.Encoding.UTF8.GetBytes(sendData);
			requestStream = httpRquest.GetRequestStream();
			requestStream.Write(dataArray, 0, dataArray.Length);
			requestStream.Close();
		}

		System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)httpRquest.GetResponse();

		//返回的cookie
		Console.WriteLine("返回的cookie:");
		//response.Headers
		var json = Newtonsoft.Json.JsonConvert.SerializeObject(response.Cookies);
		Console.WriteLine(json);

		foreach (System.Net.Cookie item in response.Cookies)
		{
			string cookie = item.Name + "=" + item.Value;
			Console.WriteLine(cookie);
			if (item.Name.Equals("JSESSIONID"))
			{
				Console.WriteLine("身份需要的cookie：" + item.Name);
				cookie_ck = item.Value;
			}
		}

		System.IO.Stream responseStream = response.GetResponseStream();
		System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, System.Text.Encoding.UTF8);
		string backMsg = reader.ReadToEnd();
		Console.WriteLine(backMsg);


		reader.Close();
		reader.Dispose();
		requestStream?.Dispose();
		responseStream.Close();
		responseStream.Dispose();
	}
	catch (Exception ex)
	{
		Console.WriteLine("异常=" + ex.ToString());
	}
	return cookie_ck;
}