WPF实战项目十三（API篇）：备忘录功能api接口、优化待办事项api接口

1、新建MenoDto.cs

/// <summary>
    /// 备忘录传输实体
    /// </summary>
    public class MemoDto : BaseDto
    {
		private string title;
		/// <summary>
		/// 标题
		/// </summary>
		public string Title
        {
			get { return title; }
			set { title = value; OnPropertyChanged(); }
		}
		private string content;
		/// <summary>
		/// 内容
		/// </summary>
		public string Content
        {
			get { return content; }
			set { content = value; OnPropertyChanged(); }
		}

	}

2、添加映射关系

CreateMap<Memo, MemoDto>().ReverseMap();

3、新建服务接口IMemoService

    public interface IMemoService : IBaseService<MemoDto>
    {
    }

4、新建服务MemoService

public class MemoService : IMemoService
    {
        private readonly IUnitOfWork _unitOfWork;
        private readonly IMapper mapper;

        public MemoService(IMapper mapper, IUnitOfWork unitOfWork)
        {
            this.mapper = mapper;
            _unitOfWork = unitOfWork;
        }
        /// <summary>
        /// 新增备忘录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<ApiResponse> AddEntityAsync(MemoDto model)
        {
            try
            {
                var memo = mapper.Map<Memo>(model);
                await _unitOfWork.GetRepository<Memo>().InsertAsync(memo);
                if(await _unitOfWork.SaveChangesAsync() > 0)
                {
                    return new ApiResponse(true, memo);
                }
                else
                {
                    return new ApiResponse(false, "添加数据失败！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }
        }
        /// <summary>
        /// 删除备忘录
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public async Task<ApiResponse> DeleteEntityAsync(int id)
        {
            try
            {
                var repository = _unitOfWork.GetRepository<Memo>();
                var memo = await repository.GetFirstOrDefaultAsync(predicate: t => t.Id.Equals(id));
                if(memo != null)
                {
                    repository.Delete(memo);
                }
                if(await _unitOfWork.SaveChangesAsync() > 0)
                {
                    return new ApiResponse(true, "删除数据成功！");
                }
                else
                {
                    return new ApiResponse(false, "删除数据失败！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }
        }
        /// <summary>
        /// 查询所有备忘录
        /// </summary>
        /// <returns></returns>
        public async Task<ApiResponse> GetAllAsync()
        {
            try
            {
                var repository = _unitOfWork.GetRepository<Memo>();
                var memo = await repository.GetAllAsync();
                if(memo != null)
                {
                    return new ApiResponse(true, memo);
                }
                else
                {
                    return new ApiResponse(false, "查询数据失败！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }
            
        }
        /// <summary>
        /// 根据Id查询备忘录
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public async Task<ApiResponse> GetSingleAsync(int id)
        {
            try
            {
                var repository = _unitOfWork.GetRepository<Memo>();
                var memo = await repository.GetFirstOrDefaultAsync(predicate: t => t.Id.Equals(id));
                if(memo != null)
                {
                    return new ApiResponse(true, memo);
                }
                else
                {
                    return new ApiResponse(false, $"查询Id={id}的数据失败！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }
        }
        /// <summary>
        /// 更新备忘录
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<ApiResponse> UpdateEntityAsync(MemoDto model)
        {
            try
            {
                var dbmemo = mapper.Map<Memo>(model);
                var repository = _unitOfWork.GetRepository<Memo>();
                var memo = await repository.GetFirstOrDefaultAsync(predicate: t => t.Id.Equals(dbmemo.Id));
                if( memo != null)
                {
                    memo.Title = dbmemo.Title;
                    memo.Content = dbmemo.Content;
                    memo.UpdateDate = DateTime.Now;
                    repository.Update(memo);
                    if(await _unitOfWork.SaveChangesAsync() > 0)
                    {
                        return new ApiResponse(true, "更新数据成功！");
                    }
                    else
                    {
                        return new ApiResponse(false, "更新数据失败！");
                    }
                }
                else
                {
                    return new ApiResponse(false, $"未查询到Id={dbmemo.Id}的数据！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }
        }
    }

5、新增MemoController控制器

    public class MemoController : BaseApiController
    {
        private readonly IUnitOfWork _unitOfWork;
        private readonly IMemoService memoService;

        public MemoController(IMemoService memoService, IUnitOfWork unitOfWork)
        {
            this.memoService = memoService;
            _unitOfWork = unitOfWork;
        }
        [HttpGet]
        public async Task<ApiResponse> GetMemoById(int Id)
        {
            return await memoService.GetSingleAsync(Id);
        }
        [HttpPost]
        public async Task<ApiResponse> AddMemo([FromBody] MemoDto memoDto)
        {
            return await memoService.AddEntityAsync(memoDto);
        }
        [HttpDelete]
        public async Task<ApiResponse> DeleteMemo(int Id)
        {
            return await memoService.DeleteEntityAsync(Id);
        }
        [HttpGet]
        public async Task<ApiResponse> GetAllMemo()
        {
            return await memoService.GetAllAsync();
        }
        [HttpPost]
        public async Task<ApiResponse> UpdateMemo(MemoDto memoDto)
        {
            return await memoService.UpdateEntityAsync(memoDto);
        }
    }

6、在program.cs添加服务

builder.Services.AddTransient<IMemoService, MemoService>();

7、F5运行项目

8、针对查询数据可以做个优化，增加查询的页数、内容、数据量等，新建查询参数类

    public class QueryParameter
    {
        public int PageIndex { get; set; }
        public int PageSize { get; set; }
        public string Search { get; set; }
    }

9、在IToDoService.cs和IMemoService.cs中添加分页查询的接口

    public interface IToDoService : IBaseService<TodoDto>
    {
        Task<ApiResponse> GetPageListAllAsync(QueryParameter parameter);
    }

    public interface IMemoService : IBaseService<MemoDto>
    {
        Task<ApiResponse> GetPageListAllAsync(QueryParameter parameter);
    }

10、在ToDoService.cs中实现接口和MemoService.cs中实现接口

/// <summary>
        /// 分页查询所有数据
        /// </summary>
        /// <param name="parameter"></param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public async Task<ApiResponse> GetPageListAllAsync(QueryParameter parameter)
        {
            try
            {
                var repository = unitOfWork.GetRepository<ToDo>();
                var todo = await repository.GetPagedListAsync(predicate: x => string.IsNullOrWhiteSpace(parameter.Search) ? true : x.Title.Contains(parameter.Search),
                    pageIndex: parameter.PageIndex,
                    pageSize: parameter.PageSize,
                    orderBy: y => y.OrderByDescending(t => t.CreateDate));
                if (todo != null)
                {
                    return new ApiResponse(true, todo);
                }
                else
                {
                    return new ApiResponse(false, "查询数据失败！");
                }
            }
            catch (Exception ex)
            {

                return new ApiResponse(false, ex.Message);
            }
        }

/// <summary>
        /// 分页查询所有备忘录
        /// </summary>
        /// <param name="parameter"></param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public async Task<ApiResponse> GetPageListAllAsync(QueryParameter parameter)
        {
            try
            {
                var repository = _unitOfWork.GetRepository<Memo>();
                var memo = await repository.GetPagedListAsync(predicate: x => string.IsNullOrWhiteSpace(parameter.Search) ? true : x.Title.Contains(parameter.Search),
                    pageIndex: parameter.PageIndex,
                    pageSize: parameter.PageSize,
                    orderBy: y => y.OrderByDescending(t => t.CreateDate));
                if (memo != null)
                {
                    return new ApiResponse(true, memo);
                }
                else
                {
                    return new ApiResponse(false, "查询数据失败！");
                }
            }
            catch (Exception ex)
            {
                return new ApiResponse(false, ex.Message);
            }

        }

11、在ToDoController和MemoController中添加代码

        [HttpGet]
        public async Task<ApiResponse> GetAllPageListToDo([FromQuery] QueryParameter parameter)
        {
            return await toDoService.GetPageListAllAsync(parameter);
        }

        [HttpGet]
        public async Task<ApiResponse> GetAllPageListMemo([FromQuery] QueryParameter parameter)
        {
            return await memoService.GetPageListAllAsync(parameter);
        }

12、F5运行项目