Question

我需要按班级和科目显示学生的数据，已完成所有操作，但我仍想按照控制器上的班级和科目显示针对其费用类型ID的清单费用，然后按学生ID显示。 >

Class:VIII Section:Blue |StudentName|Class|Section|GrandTotal|Admission Fee|TutionFee|TransportFee| |Ali |VIII |Blue | 20$ | 5$ | 11$ | 4$ | |Jastin |VIII |Blue | 20$ | 5$ | 11$ | 4$ | |Kim |VIII |Blue | 20$ | 5$ | 11$ | 4$ |

     `public JsonResult StudentSearch(int? classId,int?sectionId)
      {
        var listOfIds = _dbContext.STUDENT_FEE_DETAIL
        .Where(n=>n.STUDENT_FEE_ID ==n.StudentFee.STUDENT_FEE_ID)
        .Select(n=>n.AMOUNT);
        var fee = _dbContext.STUDENT_FEE.ToList().Where(c=>c.IsActive);
        var sec = _dbContext.SECTION.ToList();
        List<StudentInfoViewModel> SiVM =new List<StudentInfoViewModel>();
        if (classId >0 && sectionId>0)
            {
               var students = _dbContext.STUDENTINFO.Include(i =>i.Class).
               ThenInclude(c => c.Section).Where(c=>c.ClassId== classId 
                        && c.SectionId == sectionId);
               foreach (var item in students)
         {
              SiVM.Add(new StudentInfoViewModel
                { Id = item.Id,
                    AdmissionNumber = item.AdmissionNumber,
                    FullName = item.FullName,
                    ClassName = item.Class.ClassName,
                    SectionName = sec.Where(c => c.Id == sectionId)
                .Select(c => c.SectionName).FirstOrDefault(),
                    AmountDue = fee.Where(c => c.STUDENT_INFO_ID == 
                  item.Id && c.STUDENT_INFO.IsActive)
                   .Select(e =>e.GRAND_TOTAL).FirstOrDefault(),
                    StdFeeTypeDetail =listOfIds.ToString().FirstOrDefault(),
               });
            }
            }
            else
            {
                return Json(false);
            }
        return Json(SiVM);
    }`

StdFeeTypeDetail是float中的StudentInfoViewModel。请帮助我，我是Asp.net核心中的新人

Answer 1

我在listOfIds

中获得针对其学生证的费用清单

var listOfIds = _dbContext.STUDENT_FEE_DETAIL .Where(n=>n.STUDENT_FEE_ID==n.StudentFee.STUDENT_FEE_ID) .Select(n=> new { feeid = n.FEE_TYPE_ID, feetypeName= n.FEE_TYPE.Name, amount= n.AMOUNT, studentid= n.StudentFee.STUDENT_INFO_ID, studentName=n.StudentFee.STUDENT_INFO.FullName }).GroupBy(x => x.studentid).ToList();

但是我在foreach循环中遇到问题

不能将类型System.Linq.IGrouping（int，float？）隐式转换为'float'

我如何获取费用类型的ID列表以及学生ID

1 个答案: