c# - 迁移到 AutoMapper 5

Question

我正在使用 AutoMapper 4.X 如下（简化片段）

Mapper.CreateMap<A,B>()
  .ForMember(myB.MyProp, o => o.Foo()); // Foo is an extention method -> see below


public static void Foo<T> (this IMemberConfigurationExpression<T> config)
{
   config.ResolveUsing((resolutionResult, source) =>
   {
          var name = resolutionResult.Context.MemberName; // this is what I want
   }
}

resolutionResult调用时AutoMapper 5.X 不再有，config.ResolveUsing因此我无法从中获取我想要的信息 ( MemberName)。

任何想法如何调整代码以使其与 AutoMapper 5 一起使用？

Answer 1

如果您将转换为MemberConfigurationExpression，您将可以访问DestinationMember包含您想要的信息的它：

public static void Foo<TSrc, TObj>(this IMemberConfigurationExpression<TSrc, TObj, object> config)
{
    config.ResolveUsing((resolutionResult, source) =>
    {
        var memberConfExpr = config as MemberConfigurationExpression<TSrc, TObj, object>;

        if (memberConfExpr == null)
            return false;

        var name = memberConfExpr.DestinationMember.Name;

        // ...
    });
}