link

1、在header里加入分页导航信息
查看此处
2、给返回的Dto加入link，实现HATEOAS
分两步：①给每一个Value都给一个link，根据情况添加post、get、put等信息
②给总的Value添加一个link，包含对总Values的实际操作。
准备工作：创建linkDto对象，用于存储链接

    public class LinkDto
    {
        public string Href { get; set; }
        public string Rel { get; set; }
        public string Method { get; set; }

        public LinkDto(string href, string rel, string method)
        {
            Href = href;
            Rel = rel;
            Method = method;
        }
    }

① 创建子value的link方法

        private IEnumerable<LinkDto> CreateLinkForTouristRoute(
            Guid touristRouteId,
            string fields)
        {
            List<LinkDto> links = new List<LinkDto>();

            links.Add(
                new LinkDto(
                    Url.Link("GetTouristRouteById", new { touristRouteId, fields }),
                    "self",
                    "GET"
                    )
                );

            // 更新
            links.Add(
                new LinkDto(
                    Url.Link("UpdateTouristRoute", new { touristRouteId }),
                    "update",
                    "PUT"
                    )
                );

            // 局部更新 
            links.Add(
                new LinkDto(
                    Url.Link("PartiallyUpdateTouristRoute", new { touristRouteId }),
                    "partially_update",
                    "PATCH")
                );

            // 删除
            links.Add(
                new LinkDto(
                    Url.Link("DeleteTouristRoute", new { touristRouteId }),
                    "delete",
                    "DELETE")
                );

            // 获取路线图片
            links.Add(
                new LinkDto(
                    Url.Link("GetPictureListForTouristRoute", new { touristRouteId }),
                    "get_pictures",
                    "GET")
                );

            // 添加新图片
            links.Add(
                new LinkDto(
                    Url.Link("CreateTouristRoutePicture", new { touristRouteId }),
                    "create_picture",
                    "POST")
                );

            return links;
        }

②创建总的Values的link 方法

        private IEnumerable<LinkDto> CreateLinksForTouristRouteList(TouristRouteResourceParamaters paramaters, PaginationResourceParamaters paramaters2)
        {
            List<LinkDto> links = new List<LinkDto>
            {
                // 添加self，自我链接
                new LinkDto(_urlHelper.GenerateTouristRouteResourceURL(paramaters, paramaters2, ResourceUriType.CurrnetPage),"self","GET"),//此处的方法为给header创建连接的方法

                // "api/touristRoutes"
                // 添加创建旅游路线
                new LinkDto(Url.Link("CreateTouristRoute", null),"create_tourist_route","POST")
            };

            return links;
        }

③在使用中调用方法：

                IEnumerable<LinkDto> linkDto = CreateLinksForTouristRouteList(paramaters, paramaters2);

                IEnumerable<IDictionary<string, object>> shapedDtoWithLinklist = shapedDtoList.Select(t =>
                {
                    IDictionary<string, object> touristRouteDictionary = t;
                    IEnumerable<LinkDto> links = CreateLinkForTouristRoute(
                        (Guid)touristRouteDictionary["Id"], null);
                    touristRouteDictionary.Add("links", links);
                    return touristRouteDictionary;
                });

                var result = new
                {
                    value = shapedDtoWithLinklist,
                    links = linkDto
                };

                return Ok(result);