系列目录：
asp.net zero 8.2 学习-1-安装
asp.net zero 8.2 学习-3-添加实体，并迁移到数据库
asp.net zero 8.2 学习-5-实现增删改查服务及API测试
asp.net zero 8.2 学习-7-展示实体列表，实现查询，分页，过滤，排序功能
asp.net zero 8.2 学习-8-实现在页面添加、编辑、删除、查看实体
asp.net zero 8.2 学习-9-多租户设置,发送邮件配置
asp.net zero 8.2 学习-11-Metronic替换google字体，加速网页加载速度
在asp.net zero 中实现单表增删改查：
编写增删改查服务方法
API测试服务
删除实体
注意在删除实体Delete(EntityDto input)，可以先查询再修改，也可以直接删除实体，删除实体注意要转换成主键类型
public async Task Delete(EntityDto input)
{
//先查询再修改
//var demoObject = await _demoObjectRepository.GetAsync(input.Id);
//await _demoObjectRepository.DeleteAsync(demoObject);
//直接删除实体，注意转换id，不转换则删不了
await _demoObjectRepository.DeleteAsync((int)input.Id);
}
查询实体
在分页查询数据集合时，需要先排序再映射，可能是Entity Framework 3.1的问题，也可能是System.Linq.Dynamic.Core程序集的问题，如果先映射再排序分页，就会出现错误：具体原因还没找到,另外一点CountAsync需要引用using Abp.Linq.Extensions; OrderBy动态查询需要引用using System.Linq.Dynamic.Core;
查询实体报的错误：
下面是修改后的代码（先排序再映射）：
public async Task<PagedResultDto<GetDemoObjectForViewDto>> GetAll(GetAllDemoObjectInput input)
{
//注意这里要用Abp.Linq.Extensions，否则返回的是IEnumerable类型
var filter = _demoObjectRepository.GetAll()
.WhereIf(!string.IsNullOrWhiteSpace(input.Filter), e => e.Name.Contains(input.Filter))
.WhereIf(!string.IsNullOrWhiteSpace(input.NameFilter), e => e.Name.Equals(input.NameFilter));
//先排序，再映射
filter = filter.OrderBy(input.Sorting ?? "id asc");//OrderBy来自System.Linq.Dynamic.Core
var query = (from o in filter
orderby o.Id
select new GetDemoObjectForViewDto()
{
DemoObject = ObjectMapper.Map<DemoObjectDto>(o)
});
var totalCount = await query.CountAsync(); //CountAsync来自Abp.Linq.Extensions
var demoObject = await query
.PageBy(input)
.ToListAsync();
var result = new PagedResultDto<GetDemoObjectForViewDto>()
{
TotalCount = totalCount,
Items = demoObject
};
return result;
}
下面是整个服务类：
using Abp.Application.Services.Dto;
using Abp.Collections.Extensions;
using Abp.Domain.Repositories;
using EDU.SIS.Demo.Dtos;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Abp.Linq.Extensions;
using System.Linq.Dynamic.Core;
namespace EDU.SIS.Demo
{
public class DemoObjectAppService : SISAppServiceBase, IDemoObjectAppService
{
private readonly IRepository<DemoObject> _demoObjectRepository;
public DemoObjectAppService(IRepository<DemoObject> demoObjectRepository)
{
_demoObjectRepository = demoObjectRepository;
}
/// <summary>
/// 创建和修改
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public async Task CreateOrEdit(CreateOrEditDemoObjectDto input)
{
if (input.Id==null)
{
//创建
await Create(input);
}
else
{
//修改
await Update(input);
}
}
/// <summary>
/// 创建实体
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
private async Task Create(CreateOrEditDemoObjectDto input)
{
var demoObject = ObjectMapper.Map<DemoObject>(input);
await _demoObjectRepository.InsertAsync(demoObject);
}
/// <summary>
/// 修改实体
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
private async Task Update(CreateOrEditDemoObjectDto input)
{
var demoObject = await _demoObjectRepository.FirstOrDefaultAsync((int)input.Id);
var demo = ObjectMapper.Map(input, demoObject);
//await _demoObjectRepository.UpdateAsync(demo);
}
/// <summary>
/// 数据删除
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public async Task Delete(EntityDto input)
{
var demoObject = await _demoObjectRepository.GetAsync(input.Id);
await _demoObjectRepository.DeleteAsync(demoObject);
}
/// <summary>
/// 分页查询所有实体
/// </summary>
/// <param name="input">分页排序筛选</param>
/// <returns></returns>
public async Task<PagedResultDto<GetDemoObjectForViewDto>> GetAll(GetAllDemoObjectInput input)
{
//注意这里要用Abp.Linq.Extensions，否则返回的是IEnumerable类型
var filter = _demoObjectRepository.GetAll()
.WhereIf(!string.IsNullOrWhiteSpace(input.Filter), e => e.Name.Contains(input.Filter))
.WhereIf(!string.IsNullOrWhiteSpace(input.NameFilter), e => e.Name.Equals(input.NameFilter));
//先排序，再映射
filter = filter.OrderBy(input.Sorting ?? "id asc");//OrderBy来自System.Linq.Dynamic.Core
var query = (from o in filter
orderby o.Id
select new GetDemoObjectForViewDto()
{
DemoObject = ObjectMapper.Map<DemoObjectDto>(o)
});
var totalCount = await query.CountAsync(); //CountAsync来自Abp.Linq.Extensions
var demoObject = await query
.PageBy(input)
.ToListAsync();
var result = new PagedResultDto<GetDemoObjectForViewDto>()
{
TotalCount = totalCount,
Items = demoObject
};
return result;
}
/// <summary>
/// 获取修改数据详情
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public async Task<GetDemoObjectForEditOutput> GetDemoObjectForEdit(EntityDto input)
{
var demoObject = await _demoObjectRepository.GetAsync(input.Id);
var result = new GetDemoObjectForEditOutput()
{
DemoObject = ObjectMapper.Map<DemoObjectDto>(demoObject)
};
return result;
}
/// <summary>
/// 获取单条数据
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public async Task<GetDemoObjectForViewDto> GetDemoObjectForView(int id)
{
var demoObject = await _demoObjectRepository.GetAsync(id);
var result = new GetDemoObjectForViewDto()
{
DemoObject = ObjectMapper.Map<DemoObjectDto>(demoObject)
};
return result;
}
}
}
API测试
分页查询：
创建实体
修改实体
删除实体
在删除实体时，无法用post，提示405错误，还没找到原因，可能是需要传递http头部参数，这里只能用delete方法，可以删除实体：
查询单个实体
