从AutoMapper 5.0开始，IMappingExpression上的. typemap属性消失了，这意味着4.2解决方案不再有效。我已经创建了一个解决方案，使用原始功能，但具有不同的语法:

var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMap<Src, Dest>();
    cfg.IgnoreUnmapped();        // Ignores unmapped properties on all maps
    cfg.IgnoreUnmapped<Src, Dest>();  // Ignores unmapped properties on specific map
});

// or add  inside a profile
public class MyProfile : Profile
{
   this.IgnoreUnmapped();
   CreateMap<MyType1, MyType2>();
}

实现:

public static class MapperExtensions
{
    private static void IgnoreUnmappedProperties(TypeMap map, IMappingExpression expr)
    {
        foreach (string propName in map.GetUnmappedPropertyNames())
        {
            if (map.SourceType.GetProperty(propName) != null)
            {
                expr.ForSourceMember(propName, opt => opt.Ignore());
            }
            if (map.DestinationType.GetProperty(propName) != null)
            {
                expr.ForMember(propName, opt => opt.Ignore());
            }
        }
    }

    public static void IgnoreUnmapped(this IProfileExpression profile)
    {
        profile.ForAllMaps(IgnoreUnmappedProperties);
    }

    public static void IgnoreUnmapped(this IProfileExpression profile, Func<TypeMap, bool> filter)
    {
        profile.ForAllMaps((map, expr) =>
        {
            if (filter(map))
            {
                IgnoreUnmappedProperties(map, expr);
            }
        });
    }

    public static void IgnoreUnmapped(this IProfileExpression profile, Type src, Type dest)
    {
        profile.IgnoreUnmapped((TypeMap map) => map.SourceType == src && map.DestinationType == dest);
    }

    public static void IgnoreUnmapped<TSrc, TDest>(this IProfileExpression profile)
    {
        profile.IgnoreUnmapped(typeof(TSrc), typeof(TDest));
    }
}

这个问题已经问了几年了，但是这个扩展方法对我来说似乎更干净，使用当前版本的AutoMapper (3.2.1):

public static IMappingExpression<TSource, TDestination> IgnoreUnmappedProperties<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
{
    var typeMap = Mapper.FindTypeMapFor<TSource, TDestination>();
    if (typeMap != null)
    {
        foreach (var unmappedPropertyName in typeMap.GetUnmappedPropertyNames())
        {
            expression.ForMember(unmappedPropertyName, opt => opt.Ignore());
        }
    }

    return expression;
}

对于Automapper 5.0，为了跳过所有未映射的属性，你只需要放

.ForAllOtherMembers（x=>x.Ignore（））;

在你资料的最后。

例如:

internal class AccountInfoEntityToAccountDtoProfile : Profile
{
    public AccountInfoEntityToAccountDtoProfile()
    {
        CreateMap<AccountInfoEntity, AccountDto>()
           .ForMember(d => d.Id, e => e.MapFrom(s => s.BankAcctInfo.BankAcctFrom.AcctId))
           .ForAllOtherMembers(x=>x.Ignore());
    }
}

在这种情况下，只有Id字段的输出对象将被解析，所有其他将被跳过。工作就像一个魅力，似乎我们不需要任何棘手的扩展了!

我更新了Robert Schroeder对AutoMapper 4.2的答案。对于非静态映射器配置，我们不能使用mapper . getalltypemaps()，但表达式有一个对所需的TypeMap的引用:

public static IMappingExpression<TSource, TDestination> 
    IgnoreAllNonExisting<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
{
    foreach (var property in expression.TypeMap.GetUnmappedPropertyNames())
    {
        expression.ForMember(property, opt => opt.Ignore());
    }
    return expression;
}

版本12 这是一个非常糟糕的代码，但它解决了紧急工作。

      CreateMap<RepairPutRequest, Repair>(MemberList.None) 
                .ForAbdusselamMember(x => x.ClosedLostTimeId, y => y.MapFrom(z => z.ClosedLostTimeId))
                .ForAbdusselamMember(x => x.Explanation, y => y.MapFrom(z => z.Explanation)).IgnoreUnmapped()
                ; 

  public static class MappingExtensions
    {
        public static Dictionary<string, List<string>> list = new Dictionary<string, List<string>>();
        public static IMappingExpression<TSource, TDestination> IgnoreUnmapped<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
        {
             var sourceType = typeof(TSource);
            var destinationType = typeof(TDestination);
            var key =$"{sourceType.FullName}__||__{destinationType.FullName}"   ;
            var t = list[key];
            foreach (var item in destinationType.GetProperties())
            {
                if (!t.Contains(item.Name)) {
                    expression.ForMember(item.Name, x => x.Ignore());
                    }
            }
            return expression;
        }
        public static IMappingExpression<TSource, TDestination> ForAbdusselamMember<TSource, TDestination, TMember>(this IMappingExpression<TSource, TDestination> expression,
            Expression<Func<TDestination, TMember>> destinationMember, Action<IMemberConfigurationExpression<TSource, TDestination, TMember>> memberOptions )
        {
            var sourceType = typeof(TSource);
            var destinationType = typeof(TDestination);
            var key = $"{sourceType.FullName}__||__{destinationType.FullName}";
            if (!list.ContainsKey(key))
            {
                list[key]=new List<string>();
            }
            expression.ForMember(destinationMember, memberOptions);
            var memberInfo = ReflectionHelper.FindProperty(destinationMember);

            list[key].Add(memberInfo.Name);
            return expression;
        }
          
    }

更新:这个答案对那些使用最新版本的Automapper不再有用，因为ForAllOtherMembers已经在Automapper 11中被删除了。

AutoMapper的5.0.0-beta-1版本引入了ForAllOtherMembers扩展方法，所以你现在可以这样做:

CreateMap<Source, Destination>()
    .ForMember(d => d.Text, o => o.MapFrom(s => s.Name))
    .ForMember(d => d.Value, o => o.MapFrom(s => s.Id))
    .ForAllOtherMembers(opts => opts.Ignore());

请注意，显式映射每个属性有一个好处，因为当您忘记映射某个属性时，您永远不会遇到映射失败的问题。

也许在您的情况下，明智的做法是忽略所有其他成员，并添加一个TODO来返回，并在该类的更改频率稳定下来后显式地显示这些成员。