Mapper（对象映射）

只是演示反射的用法，使用反射的方式性能不好，可以使用表达式树的方式做对象映射。查看Linq分类里有相关文章

 Mapper：

public class Mapper
    {
        private static ConcurrentDictionary<Type, PropertyInfo[]> PROPTY_CACHE = new ConcurrentDictionary<Type, PropertyInfo[]>();
        public static outT Map<inT, outT>(inT inObj) where outT : class
        {
            var inType = typeof(inT);
            var outType = typeof(outT);
            outT outObj = Activator.CreateInstance<outT>();

            PropertyInfo[] outProperties = PROPTY_CACHE.GetOrAdd(outType, (k) =>
            {
                return outType.GetProperties();
            });
            PropertyInfo[] inProperties = PROPTY_CACHE.GetOrAdd(inType, (k) =>
            {
                return inType.GetProperties();
            });
            PropertyInfo inProp = null;
            foreach (var outProp in outProperties)
            {
                if (inProperties.Select(p=>p.Name.Equals(outProp.Name,StringComparison.CurrentCultureIgnoreCase)).Any())
                {
                    inProp = inProperties.FirstOrDefault(p => p.Name.Equals(outProp.Name, StringComparison.CurrentCultureIgnoreCase));
                    outProp.SetValue(outObj, inProp.GetValue(inObj));
                }
            }
            return outObj;

        }
    }

客户端：

People p = new People() { ID=1,Name="fan", Xingbie = true,Birthday=DateTime.Now,Dog=new Pet() { Name="阿黄"} };
PeopleDTO pDTO = Mapper.Map<People, PeopleDTO>(p);




    public class People
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public bool Xingbie { get; set; }
        public DateTime Birthday { get; set; }  
        public Pet Dog { get; set; }
    }
    public class PeopleDTO
    {
        public int ID { get; set; }
        public string name { get; set; }
        public DateTime Birthday { get; set; }
        public Pet dog { get; set; }
    }
    public class Pet { 
    public string Name { get; set; }
    }