AutoMapper -如何在映射中使用集合索引

// 定义源对象和目标对象
public class SourceObject
{
    public List<string> SourceList { get; set; }
}

public class DestinationObject
{
    public List<int> DestinationList { get; set; }
}

// 配置映射规则
Mapper.Initialize(cfg =>
{
    cfg.CreateMap<SourceObject, DestinationObject>()
        .ForMember(dest => dest.DestinationList, opt =>
        {
            opt.ResolveUsing((source, destination, destMember, context) =>
            {
                var sourceList = source.SourceList;
                var destinationList = new List<int>();

                for (int i = 0; i < sourceList.Count; i++)
                {
                    // 使用索引访问源集合中的元素，并进行转换
                    var sourceItem = sourceList[i];
                    var destinationItem = int.Parse(sourceItem);
                    destinationList.Add(destinationItem);
                }

                return destinationList;
            });
        });
});

// 执行映射
var source = new SourceObject
{
    SourceList = new List<string> { "1", "2", "3" }
};

var destination = Mapper.Map<SourceObject, DestinationObject>(source);

// 输出结果
Console.WriteLine(string.Join(", ", destination.DestinationList)); // 1, 2, 3