using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Reflection;namespace MCO.EF
{public class Test{//实例化上下文ConnectionSQL connection = new ConnectionSQL();//增加public int DataAdd(){User user = new User(){UserName = "陆六",UserSex = true};connection.User.Add(user);return connection.SaveChanges();}//删除public int Delete(){List<User> user = connection.User.Where<User>(u => u.UserId > 2).ToList<User>();foreach(User u in user){connection.User.Remove(u);}return connection.SaveChanges();}//修改public int Update(){List<User> user =  connection.User.Where<User>(u => u.UserSex == true).ToList<User>();foreach(User u in user){u.UserSex = false;}return connection.SaveChanges();}//查询private void UserList(){IQueryable userList = connection.User.Where<User>(u => u.UserId > 1);//反射获取实体类的所有属性值和属性名PropertyInfo[] attribute = typeof(User).GetProperties();//调用 ListToJson 方法
            Console.Write(ListToJson(attribute, userList));}//反射拼接成 jsonprivate string ListToJson(PropertyInfo[] attribute, IQueryable dataList){StringBuilder strJson = new StringBuilder(256);foreach(var data in dataList){strJson.Append("{");for(int i = 0; i < attribute.Length; i++){//获取属性名 和 属性值(通过反射)strJson.AppendFormat("\"{0}\":\"{1}\",", attribute[i].Name, attribute[i].GetValue(data));}strJson.Remove(strJson.Length - 1, 1);strJson.Append("},");}strJson.Remove(strJson.Length - 1, 1);return strJson.ToString();}}
}