实体映射-------AutoMapper

淩亂°似流年 2023-06-05 11:13 11阅读 0赞

现在有2个实体(A、B)，2个实体中的部分字段是相同的，现在把A实体获取的值赋值给B实体，利用AutoMapper实体映射可以轻松解决

[参考][Link 1]

实体中不同名称之间的映射可以这样写

Mapper.Initialize(x =>
                x.CreateMap<WorldA, WorldB>()
                 .ForMember(d => d.AGE, opt => {
                 opt.MapFrom(s => s.name);
               })
               );

注意:字段名称相同的类型一定也要相同不然会报错的

[AutoMapper.3.2.1\\lib\\net40][AutoMapper.3.2.1_lib_net40]

//第一步初始化
                Mapper.Initialize(cfg =>
                {
                    cfg.CreateMap<WorldA, WorldB>();
                });
    
                List<WorldA> worldAs = new List<WorldA>()
                {
                   new WorldA() { id = 1, wewe = "测试1",name="98k" },
                   new WorldA() { id = 2, wewe = "测试2",name="98k" },
                   new WorldA() { id = 3, wewe = "测试3",name="98k" },
                };           
                //A实体值赋给B实体
                List<WorldB> b = Mapper.Map<List<WorldA>, List<WorldB>>(worldAs).ToList();

public class WorldA
            {
                public int id { get; set; }
                public string wewe { get; set; }
    
                public string name { get; set; }
            }
            public class WorldB
            {
                public int id { get; set; }
                public string wewe { get; set; }
    
                public string AGE { get; set; }
    
               public string money { get; set; }
            }

值为null的处理

Mapper.Initialize(x => x.AddProfile<UserProfile>());
                List<WorldA> worldAs = new List<WorldA>()
                {
                   new WorldA() { id = 1, wewe = "测试1",name=null },
                   new WorldA() { id = 2, wewe = "测试2",name="98k" },
                   new WorldA() { id = 3, wewe = "测试3",name="98k" },
                };  
                
                //A实体值赋给B实体
                List<WorldB> b = Mapper.Map<List<WorldA>, List<WorldB>>(worldAs).ToList();
    public class UserProfile : Profile
            {
                protected override void Configure()
                {
                    CreateMap<WorldA, WorldB>()
                        .ForMember(d => d.AGE, opt => opt.MapFrom(s => s.name))
                        .ForMember(d => d.AGE, opt => opt.NullSubstitute("值为空")                    
                        );
                    CreateMap<WorldA, WorldB>()
                       .ForMember(d => d.money, opt => opt.MapFrom(s => s.name))
                       .ForMember(d => d.money, opt => opt.NullSubstitute("值为空")
                       );
                }
            }

转载于:https://www.cnblogs.com/macT/p/11389896.html

[Link 1]: https://www.cnblogs.com/vaevvaev/p/7080423.html
[AutoMapper.3.2.1_lib_net40]: https://pan.baidu.com/s/1sqc6qksHpMj-1tjmbjUxng