C# http post提交

Http.CS

    public class Http
    {
        public static string Post(string requestUri,string json)
        {
            string strUri = requestUri;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strUri);
            request.Method = "POST";
            request.ContentType = "application/json";
            string paraUriCoded = json;
            byte[] payload;
            payload = System.Text.Encoding.UTF8.GetBytes(paraUriCoded);
            request.ContentLength = payload.Length;
            Stream writer;
            try
            {
                writer = request.GetRequestStream();
            }
            catch (Exception ex)
            {
                return ex.ToString();                
            }
            writer.Write(payload, 0, payload.Length);
            writer.Close();
            HttpWebResponse response;
            try
            {
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream s = response.GetResponseStream();
            StreamReader sRead = new StreamReader(s);
            string postContent = sRead.ReadToEnd().ToString();
            sRead.Close();
            return postContent;
        }
    }

调用方法

Http.Post(api连接, 需要发送的json数据);

示例

string url = "http://***.*****.***";
string ceshi = "{\r\n  \"data\": {" + "},\r\n  \"timestamp\": "+ timeS + ",\r\n  \"sign\": \"\"\r\n}";
string yu = Http.Post(url, ceshi);