Automapper - 映射嵌套在对象List中的自定义对象

时间:2016-02-15 06:59:45

标签: c# reflection automapper nested-map

我需要将List<Source>映射到List<Dest>,问题是源内包含NestedObject&amp; Dest中还包含NestedObject。我的List正在映射时,我也需要映射这两个。我已尝试过所有内容,但嵌套对象始终保持null并且没有映射,或者我得到以下异常:

  

缺少类型映射配置或不支持的映射。映射类型:   .....

来源与结构的结构目的地:

来源:

 public class Source {
        public string Prop1 { get; set; }
        public CustomObjectSource NestedProp{ get; set; }
        }
  public class CustomObjectSource {
        public string Key { get; set; }
        public string Value{ get; set; }
        }

目标

 public class Destination {
        public string Prop1 { get; set; }
        public CustomObjectDest NestedProp{ get; set; }
        }
  public class CustomObjectDest {
        public string Key { get; set; }
        public string Value{ get; set; }
        }

我尝试了什么: 我有以下代码,尝试了其他几种方法,但无济于事:

var config = new MapperConfiguration(c =>
                {
                    c.CreateMap<Source, Destination>()
                      .AfterMap((Src, Dest) => Dest.NestedProp = new Dest.NestedProp
                      {
                          Key = Src.NestedProp.Key,
                          Value = Src.NestedProp.Value
                      });
                });                
                var mapper = config.CreateMapper();

var destinations = mapper.Map<List<Source>, List<Destination>>(MySourceList.ToList());

我坚持了好几天,请帮助。

1 个答案:

答案 0 :(得分:1)

您还必须将CustomObjectSource映射到CustomObjectDest。

这应该这样做:

var config = new MapperConfiguration(c =>
        {
            c.CreateMap<CustomObjectSource, CustomObjectDest>();
            c.CreateMap<Source, Destination>()
              .AfterMap((Src, Dest) => Dest.NestedProp = new CustomObjectDest
              {
                  Key = Src.NestedProp.Key,
                  Value = Src.NestedProp.Value
              });
        });
        var mapper = config.CreateMapper();

        var MySourceList = new List<Source>
        {
            new Source
            {
                Prop1 = "prop1",
                NestedProp = new CustomObjectSource()
                {
                    Key = "key",
                    Value = "val"
                }
            }
        };

        var destinations = mapper.Map<List<Source>, List<Destination>>(MySourceList.ToList());