C# 利用反射进行类型转换

 /// <summary>
        /// 父类转子类
        /// </summary>
        /// <typeparam name="TParent"></typeparam>
        /// <typeparam name="TChild"></typeparam>
        /// <param name="parent"></param>
        /// <returns></returns>
        public static TChild AutoCopy<TParent, TChild>(TParent parent) where TChild : TParent, new()
        {
            TChild child = new TChild();
            var ParentType = typeof(TParent);
            var Properties = ParentType.GetProperties();
            foreach (var Propertie in Properties)
            {
                //循环遍历属性
                if (Propertie.CanRead && Propertie.CanWrite)
                {
                    //进行属性拷贝
                    Propertie.SetValue(child, Propertie.GetValue(parent, null), null);
                }
            }
            return child;
        }

        /// <summary>
        /// 类型转换
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <typeparam name="R"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static R ToResult<T, R>(T obj) where R : new()
        {
            R t = new R();
            var props = typeof(T).GetProperties().Where(a => a.CanRead && a.CanWrite);
            foreach (var item in props)
            {
                item.SetValue(t, item.GetValue(obj, null), null);
            }
            return t;
        }

        /// <summary>
        /// 检查对象中的属性是有有null值
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="t"></param>
        /// <returns></returns>
        public static bool CheckObjHaveNullFiled<T>(T t)
        {
            if (t == null)
            {
                return true;
            }
            else
            {
                //属性列表
                var proList = typeof(T).GetProperties();

                return proList.Where(a => a.GetValue(t, null) == null || string.IsNullOrEmpty(a.GetValue(t, null).ToString().Trim())).Count() > 0;
            }
        }