C# Json 常用

1、MVC返回json方式

　　1、（自定义返回json对象）var optionStrCity=“”；var optionStrBank =“”；

return  Json(new { optionStrCity = optionStrCity, optionStrBank = optionStrBank });

　　2、（MVC 对象Json序列化） Object obj=new Object（）；

return Json（obj，JsonBehavier.AllowGet）;

2、Json 接收 

　　1、（自动映射）

　　var postData=$.toJSON(obj);

List<ContractPostModel> ModelList = JsonConvert.DeserializeObject<List<ContractPostModel>>(System.Web.HttpContext.Current.Request.Form["postData"]); 

3、C# post 数据

#region 调取接口 post 数据
            JavaScriptSerializer jss = new JavaScriptSerializer();
            string JsonStr = "JsonDetail=" + jss.Serialize(AppLyDetail);
            string AddUrl = "http://jrpt.fang.com/managerproduct/DataMigrate/AddOnepointzero";

            byte[] postData = Encoding.UTF8.GetBytes(JsonStr);//编码，尤其是汉字，事先要看下抓取网页的编码方式  
            WebClient webClient = new WebClient();
            webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");//采取POST方式必须加的header，如果改为GET方式的话就去掉这句话即可  
            try
            {
                byte[] responseData = webClient.UploadData(AddUrl, "POST", postData);//得到返回字符流 
                string srcString = Encoding.UTF8.GetString(responseData);//解码  
                if (!string.IsNullOrWhiteSpace(srcString))
                {
                    if (srcString != "error")
                    {
                        if (OrderType == 1)
                        {
                            Finance_LoanAppPerBLL.UpdateLoanInfoIsTongBu(AppLyDetail.ID, 1, AppLyDetail.OrderNo);
                        }
                        else
                        {
                            Finance_LoanAppAgentBLL.UpdateLoanInfoIsTongBu(AppLyDetail.ID, 1, AppLyDetail.OrderNo);
                        }
                        WriteLog(AppLyDetail.OrderNo + "------执行成功");
                        return 1;
                    }
                    else
                    {
                        WriteLog(AppLyDetail.OrderNo + "------同步失败");
                        return 0;
                    }
                }
                else
                {
                    WriteLog(AppLyDetail.OrderNo + "------同步失败");
                    return 0;
                }
            }
            catch (Exception)
            {
                WriteLog(AppLyDetail.OrderNo + "------执行异常");
                return 0;
            }
            #endregion

4、C# 模拟http请求（POST）

private string HttpPost(string Url, string postDataStr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = Encoding.UTF8.GetByteCount(postDataStr);
            request.CookieContainer = cookie;
            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;
        }

5、C# 模拟http请求（GET）

public string HttpGet(string Url, string postDataStr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url + (postDataStr == "" ? "" : "?") + postDataStr);
            request.Method = "GET";
            request.ContentType = "text/html;charset=UTF-8";
 
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close();
 
            return retString;
        }