C#利用using System.Net实现Json数据提交WebAPI

        /// <summary>
        /// 提交Json接口的数据方法
        /// </summary>
        /// <param name="Url"></param>
        /// <param name="jsonParas"></param>
        /// <returns></returns>
        public string Post(string Url, string jsonParas)
        {
            string postContent = "";
            string strURL = Url;
            //创建一个HTTP请求
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strURL);
            //Post请求方式
            request.Method = "POST";
            //内容类型
            request.ContentType = "application/json;charset=UTF-8";
            //设置参数，并进行URL编码
            string paraUrlCoded = jsonParas;//System.Web.HttpUtility.UrlEncode(jsonParas);
            byte[] payload;
            //将Json字符串转化为字节
            payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
            //设置请求的ContentLength            
            request.ContentLength = payload.Length;
            //发送请求，获得请求流
            Stream writer;
            try
            {
                writer = request.GetRequestStream();//获取用于写入请求数据的Stream对象
            }
            catch (Exception)
            {
                writer = null;
                postContent = "连接服务器失败!";
            }
            //将请求参数写入流
            writer.Write(payload, 0, payload.Length);
            writer.Close();//关闭请求流
                           // String strValue = "";//strValue为http响应所返回的字符流
            HttpWebResponse response;
            try
            {
                //获得响应流
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream s = response.GetResponseStream();
            //  Stream postData = Request.InputStream;
            StreamReader sRead = new StreamReader(s);
            postContent = sRead.ReadToEnd();
            sRead.Close();
            return postContent;//返回Json数据
        }

调用示例

            //写入接口参数准备
            string param = string.Format("tano={0}&taType=1", detail.tano);//签名对象
            string sign = Md5.md5(param, 32).ToUpper();//签名生成，具体根据接口文档
            string urlResult = url + "/tenant/submitDetail?" + param;
            List<SubmitDetailInterface> detailInterfaces = new List<SubmitDetailInterface>();
            SubmitDetailInterface detailInterface = new SubmitDetailInterface()
            {
                id = detail.id,
                act = detail.act,
                supplyBase = detail.supplyBase,
                amount = detail.amount,
                baseNo = detail.baseNo,
                carModel = detail.carModel,
                partModel = detail.partModel,
                partName = detail.partName,
                partNo = detail.partNo,
                prodBase = detail.prodBase,
                supplyName = detail.supplyName,
                supplyNo = detail.supplyNo,
                taName = detail.taName,
                tano = detail.tano,
                taType = detail.taType,
                updateAt = detail.updateAt,
                unit = detail.unit
            };
            detailInterfaces.Add(detailInterface);
            string jsonParas = JsonConvert.SerializeObject(new { sign = sign, isIncrement = "1", data = detailInterfaces });
            //写入
            string relust = Post(urlResult, jsonParas);
            
            CAResult cA = JsonConvert.DeserializeObject<CAResult>(relust);//返回结果

    public class CAResult  //返回结果接收类，根据实际情况创建
    {
        public bool success { get; set; }
        public string message { get; set; }
        public string code { get; set; }
        public string result { get; set; }
    }