EF架构~对AutoMapper实体映射的扩展
AutoMapper在之前我曾经介绍过,今天主要是把它作一下扩展,因为它的调用太麻烦了,呵呵,扩展之后,用着还可以,感觉.net3.5之后,有了扩展方法这个东西,在程序开发速度及表现力上都有了明显的提升,呵呵。
当扩展方法开发完之后的效果如下
实体对实体的映射(赋值)
var user = new User { ID = 1, Name = "zzl", CreateDate = DateTime.Now, }; UserModel model = user.MapTo<UserModel>(); Console.WriteLine(model.ID + model.Name);
集合对集合的映射(赋值)
var userList = new List<User> { user }; userList.Add(new User { ID = 2, Name = "zzllr", CreateDate = DateTime.Now, }); var modelList = userList.MapTo<UserModel>(); modelList.ForEach(i => { Console.WriteLine(i.Name); });
下面是扩展方法的代码,一个是实体的,一个是集合的
/// <summary> /// AutoMapper扩展方法 /// </summary> public static class AutoMapperExtension { /// <summary> /// 集合对集合 /// </summary> /// <typeparam name="TResult"></typeparam> /// <param name="self"></param> /// <returns></returns> public static List<TResult> MapTo<TResult>(this IEnumerable self) { if (self == null) throw new ArgumentNullException(); Mapper.CreateMap(self.GetType(), typeof(TResult)); return (List<TResult>)Mapper.Map(self, self.GetType(), typeof(List<TResult>)); } /// <summary> /// 对象对对象 /// </summary> /// <typeparam name="TResult"></typeparam> /// <param name="self"></param> /// <returns></returns> public static TResult MapTo<TResult>(this object self) { if (self == null) throw new ArgumentNullException(); Mapper.CreateMap(self.GetType(), typeof(TResult)); return (TResult)Mapper.Map(self, self.GetType(), typeof(TResult)); } }