C# HttpWebRequest post提交数据,提交对象

//属于客户端

//要向URL Post的方法

public void PostResponse()

        {

            HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://demo2.cm-force.com/appapi/apiaccount/aa");//这是你要提交的url

            Encoding encoding = Encoding.UTF8;
            

            //参数少的情况下，直接拼接参数字符串 

//string param = "UserName=123&UserPwd=123";//post 参数

           /*

           //这是要提交的model对象

            Car c = new Car();

            c.Passed = true;//true

            c.LinkTel = "小测试";

            c.CarBrand = "11111111";

            c.Loads = 101;

            c.UserId = 50;

            c.SortId = 1;

            c.CarArea = "11111111";

            c.CarStateId = 1;

            c.LinkMan = "1111111111";

            c.Sfzh = "141124188789786031";

            c.CarNum = "ABCDE1";

            c.CarLength = 100;

            c.DrivingNum = "11111111";

            c.State = 1;

            c.CarId = 0;

            c.CarOwner = "111111";

            c.CarAreaId = 1;

            c.CarTypeId = 1;

            c.AddTime = DateTime.Now;

            */

            /*1、如果对象参数比较多的情况下，使用Dictionary字典提交数据，这样比较清晰。(针对对象)

              2、如果字段比较少的话，就直接通过拼接参数提交。例如：UserName=123&UserPwd=123 (针对少量参数)*/

            //比照上面的Car对象转成Dictionary<string, string>泛型集合

            IDictionary<string, string> para = new Dictionary<string, string>();

            para.Add("LinkTel", "第二次测试");

            para.Add("CarBrand", "");

            para.Add("Loads", "");

            para.Add("UserId", "");

            para.Add("SortId", "");

            StringBuilder buffer = new StringBuilder();//这是要提交的数据

              int i = ;

            //通过泛型集合转成要提交的参数和数据

              foreach (string key in para.Keys)

            {

                if (i > )

                {

                    buffer.AppendFormat("&{0}={1}", key, para[key]);

                }

                else

                {

                    buffer.AppendFormat("{0}={1}", key, para[key]);

                }

                i++;

            } 

            //通过泛型转化得到的提交数据：LinkTel=第二次测试&CarBrand=1111&Loads=101&UserId=50&SortId=1

            //其实与上面的直接拼接参数无异，

              byte[] bs = Encoding.UTF8.GetBytes(buffer.ToString());//UTF-8

            string responseData = String.Empty;

            req.Method = "POST";

            req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";

            req.ContentLength = bs.Length;

            using (Stream reqStream = req.GetRequestStream())

            {

                reqStream.Write(bs, , bs.Length);

                reqStream.Close();

            }

            using (HttpWebResponse response = (HttpWebResponse)req.GetResponse())

            {

                using (StreamReader reader = new StreamReader(response.GetResponseStream(), encoding))

                {

                    responseData = reader.ReadToEnd().ToString();

                }

                Response.Write(responseData);

            }

        }

//发布车辆 Post方式接收，接收的是Car model对象

        [HttpPost]

        public JsonResult Caradd(InfoSL_APP.Contract.Logis.Model.Car model)

        {

            try

            {

               //下面就是您要操作接收回来的Model对象

                int b= apibll.Caradd(model);

                if (b>)

                {

                   //发布车辆成功json

                    return  Json(sb.ToString());

                }

                else

                {

                    return resultJson(b.ToString(), "发布车辆添加失败!");

                }

            }

            catch (Exception ex)

            {

                return errorJson(ex.Message.ToString());

            }

        }