反射-学习笔记3

1. 反射字段属性，获取和赋值
2. 封装数据库访问层   Console.WriteLine("*********************动态获取属性和字段************************");

  {
  People people = new People()  
        {
               Id = 506,
               Name = "YoYo"
        };
  people.Description = "VIP学员";

  Type type = typeof(People);
  foreach (PropertyInfo item in type.GetProperties ())
  {
            object oValue=item.GetValue(people);
            Console.WriteLine("{0}:  {1}", item.Name, oValue);
  }
  foreach (FieldInfo item in type.GetFields ())
  {
             object oValue = item.GetValue(people);
             Console.WriteLine("{0}:  {1}", item.Name, oValue);
  }
}

{
        Console.WriteLine("*********************设置属性和字段的值************************");
        Type type = typeof(People);
        object oPeople = Activator.CreateInstance(type);
        foreach (PropertyInfo item in type.GetProperties())
        {                        
              Console.WriteLine("{0}:  {1}", item.Name, item.GetValue (oPeople ));//为0
              if(item .Name .Equals ("Id"))
              {
                      item.SetValue(oPeople, 505);
              }
              else
              {
                       item.SetValue(oPeople, "DoDo");
              }
              Console.WriteLine("{0}:  {1}", item.Name, item.GetValue(oPeople));//设置后的值
         }
         foreach (FieldInfo item in type.GetFields())
         {
                Console.WriteLine("{0}:  {1}", item.Name, item.GetValue(oPeople));//为null
                item.SetValue(oPeople, "VIP学员");
                Console.WriteLine("{0}:  {1}", item.Name, item.GetValue(oPeople));//设置后的值
         }
     }