c#利用反射給字段屬性賦值

先定義一個類：

 public class User
    {
        public User()
        {
            Console.WriteLine($"{this.GetType().Name}被構造");
        }
        public int Id { get; set; }
        public string Name { get; set; }

        public string ClassID;
    }

 

反射：

//常規寫法賦值
{
                User user = new User();
                user.Id = 123;
                user.Name = "張三";
                user.ClassID = "1";
                Console.WriteLine($"User.Name={user.Name}");
                Console.WriteLine($"User.ClassID={user.ClassID}");
                Console.WriteLine($"User.Id={user.Id}");
            }
//利用反射動態賦值
 {
                Type type = typeof(User);  //獲取類型
                object a = Activator.CreateInstance(type);   //創建對象
                foreach (var Prop in type.GetProperties())//GetProperties獲取屬性
                {
                    Console.WriteLine($"{type.Name}.{Prop.Name}={Prop.GetValue(a)}");
                    if (Prop.Name.Equals("Id"))
                    {
                        Prop.SetValue(a, 213);//設置值
                    }
                    else if (Prop.Name.Equals("Name"))
                    {
                        Prop.SetValue(a,"張三");
                    }
                    Console.WriteLine($"{type.Name}.{Prop.Name}={Prop.GetValue(a)}");//獲取值
                }
                foreach (var Field in type.GetFields())//GetFields獲取字段
                {
                    Console.WriteLine($"{type.Name}.{Field.Name}={Field.GetValue(a)}");
                    if (Field.Name.Equals("ClassID"))
                    {
                        Field.SetValue(a, "213");
                    }          
                    Console.WriteLine($"{type.Name}.{Field.Name}={Field.GetValue(a)}");
                }
            }