public async Task <PagedResultDto <SemesterDto> > Query(SemesterQueryInput input)
{
//验证参数
if (!input.PageSize.HasValue)
{
throw new UserFriendlyException("传入PageSize参数不正确！");
}
if (!input.Start.HasValue)
{
throw new UserFriendlyException("传入Start参数不正确！");
}
//获取总数
var totalcount = await _semesterRepository.CountAsync();
//获取查询对象
var query = _semesterRepository.GetAll();
//添加分页条件
query = query.OrderBy(x => x.CreationTime)
.Skip(input.Start.Value).Take(input.PageSize.Value);
//执行查询
var courses = await Task.FromResult(query.ToList());
//包装为分页输出对象
return(new PagedResultOutput <SemesterDto>(totalcount, courses.MapTo <List <SemesterDto> >()));
}
public async Task <SemesterSimpleDto> Simple(SemesterQueryInput input)
{
//检查传入参数
if (!input.Id.HasValue)
{
throw new UserFriendlyException("传入Id参数不正确！");
}
var result = await _semesterRepository.FirstOrDefaultAsync(x => x.Id == input.Id.Value);
if (result == null)
{
throw new UserFriendlyException("该条信息不存在！");
}
return(result.MapTo <SemesterSimpleDto>());
}
