分析：此页面下包含两个接口，查询分类的名称和当前分类下的文章列表，和文章列表不同的是，它不带分页。分类包含两个字段，分类名称和展示名称，我们要把真正的名称查询出来展示在页面上。
分类名称不需要给他添加返回模型，直接返回一个string类型即可，同时给一个查询参数name，添加获取分类名称接口和缓存接口。
//IBlogService.Category.cs /// <summary> /// 获取分类名称 /// </summary> /// <param></param> /// <returns></returns> Task<ServiceResult<string>> GetCategoryAsync(string name); //IBlogCacheService.Category.cs /// <summary> /// 获取分类名称 /// </summary> /// <param></param> /// <param></param> /// <returns></returns> Task<ServiceResult<string>> GetCategoryAsync(string name, Func<Task<ServiceResult<string>>> factory);实现这两个接口。
//BlogCacheService.Category.cs ... public partial class BlogCacheService { private const string KEY_GetCategory = "Blog:Category:GetCategory-{0}"; /// <summary> /// 获取分类名称 /// </summary> /// <param></param> /// <param></param> /// <returns></returns> public async Task<ServiceResult<string>> GetCategoryAsync(string name, Func<Task<ServiceResult<string>>> factory) { return await Cache.GetOrAddAsync(KEY_GetCategory.FormatWith(name), factory, CacheStrategy.ONE_DAY); } } ... //BlogService.Category.cs /// <summary> /// 获取分类名称 /// </summary> /// <param></param> /// <returns></returns> public async Task<ServiceResult<string>> GetCategoryAsync(string name) { return await _blogCacheService.GetCategoryAsync(name, async () => { var result = new ServiceResult<string>(); var category = await _categoryRepository.FindAsync(x => x.DisplayName.Equals(name)); if (null == category) { result.IsFailed(ResponseText.WHAT_NOT_EXIST.FormatWith("分类", name)); return result; } result.IsSuccess(category.CategoryName); return result; }); }FormatWith()是扩展方法，ResponseText.WHAT_NOT_EXIST是之前说过的常量，直接查询是否存在当前name的分类，如果不存在给出错误提示，存在的话，则只返回分类名称，在BlogController中添加API。
/// <summary> /// 获取分类名称 /// </summary> /// <param></param> /// <returns></returns> [HttpGet] [Route("category")] public async Task<ServiceResult<string>> GetCategoryAsync(([Required] string name) { return await _blogService.GetCategoryAsync(name); }[Required]Attribute 指定参数name必填。
通过分类名称查询文章列表和分页查询文章列表返回模型是一样的，只是不用分页，所以直接返回一个列表就可以了，添加通过分类名称查询文章列表和缓存的接口。
//IBlogService.Post.cs /// <summary> /// 通过分类名称查询文章列表 /// </summary> /// <param></param> /// <returns></returns> Task<ServiceResult<IEnumerable<QueryPostDto>>> QueryPostsByCategoryAsync(string name); //IBlogCacheService.Post.cs /// <summary> /// 通过分类名称查询文章列表 /// </summary> /// <param></param> /// <param></param> /// <returns></returns> Task<ServiceResult<IEnumerable<QueryPostDto>>> QueryPostsByCategoryAsync(string name, Func<Task<ServiceResult<IEnumerable<QueryPostDto>>>> factory);分别实现这两个接口。
//BlogCacheService.Post.cs ... public partial class BlogCacheService { private const string KEY_QueryPostsByCategory = "Blog:Post:QueryPostsByCategory-{0}"; /// <summary> /// 通过分类名称查询文章列表 /// </summary> /// <param></param> /// <param></param> /// <returns></returns> public async Task<ServiceResult<IEnumerable<QueryPostDto>>> QueryPostsByCategoryAsync(string name, Func<Task<ServiceResult<IEnumerable<QueryPostDto>>>> factory) { return await Cache.GetOrAddAsync(KEY_QueryPostsByCategory.FormatWith(name), factory, CacheStrategy.ONE_DAY); } } ... //BlogService.Post.cs /// <summary> /// 通过分类名称查询文章列表 /// </summary> /// <param></param> /// <returns></returns> public async Task<ServiceResult<IEnumerable<QueryPostDto>>> QueryPostsByCategoryAsync(string name) { return await _blogCacheService.QueryPostsByCategoryAsync(name, async () => { var result = new ServiceResult<IEnumerable<QueryPostDto>>(); var list = (from posts in await _postRepository.GetListAsync() join categories in await _categoryRepository.GetListAsync() on posts.CategoryId equals categories.Id where categories.DisplayName.Equals(name) orderby posts.CreationTime descending select new PostBriefDto { Title = posts.Title, Url = posts.Url, Year = posts.CreationTime.Year, CreationTime = posts.CreationTime.TryToDateTime() }) .GroupBy(x => x.Year) .Select(x => new QueryPostDto { Year = x.Key, Posts = x.ToList() }); result.IsSuccess(list); return result; }); }