c# 发送http请求

public string HttpPost(string postDataStr)

{

try

{

HttpWebRequest request = (HttpWebRequest)System.Net.WebRequest.Create(APIStr);//这是服务器IP

request.Method = "POST";

request.Accept = "application/json";

request.ContentType = "application/x-www-form-urlencoded";

request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);

//request.CookieContainer = cookie;

//设定编码

Encoding encoding = Encoding.UTF8;

//先将对像序例化成JSON字串，然后再用流写入byte[]

//byte[] userByteData = encoding.GetBytes(Newtonsoft.Json.JsonConvert.SerializeObject(obj));

byte[] userByteData = encoding.GetBytes(postDataStr);

Stream stream = request.GetRequestStream();

stream.Write(userByteData, 0, userByteData.Length);

stream.Close();

//Stream myRequestStream = request.GetRequestStream();

//StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));

//myStreamWriter.Write(postDataStr);

//myStreamWriter.Close();

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

// response.Cookies = cookie.GetCookies(response.ResponseUri);

Stream myResponseStream = response.GetResponseStream();

StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));

string retString = myStreamReader.ReadToEnd();

myStreamReader.Close();

myResponseStream.Close();

return retString;

}

catch(Exception ex)

{

throw;

}

}

这是拼接Post请求参数

public string getPostStr(string op, string ac, string json)

{

//var jObject = JObject.Parse(json);

string jsonStr = "op=" + op + "&action=" + ac + "&Login_type=chain&data=" + json+"&";

return jsonStr;

}

JSONHelper jsonHelper = new JSONHelper();

string postStr = "";//post 参数

string jsonStr = jsonHelper.getPostStr("", "", postStr);

string retureJson= jsonHelper.HttpPost(jsonStr);

var jObject = JObject.Parse(retureJson);

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