业务逻辑层

namespace MySchool2.BLL
{
   public  class GradeBLL
   {
       private GradeDAL gradeDal = new GradeDAL();

       public List<GradeMode> GetGradeEx()
       {
           return gradeDal.GetGradeEx();
       }

     
   }
}

namespace MySchool2.BLL
{
   public  class ResultBLL
   {
       private ResultDAL resultDal = new ResultDAL();

       public List<ResultMode> StudetnResult(string subjectno, string stuname)
       {
           return resultDal.StudetnResult(subjectno, stuname);
       }
   }
}

namespace MySchool2.BLL
{
  public   class StudentBLL
  {
      StudentDAL studentDal = new StudentDAL();

      public DataTable GetAllStudentByProcedureOutput(string name, int gid, out int totalnum, out int myreturn)
      {
          return studentDal.GetAllStudentByProcedureOutput(name,gid, out  totalnum, out  myreturn);
      }

      public DataTable GetStudentName()
      {
          return studentDal.GetStudentName();
      }
  }
}

namespace MySchool2.BLL
{
  public   class SubjectBLL
    {
      SubjectDAL subjectDal=new SubjectDAL();
      public List<SubjectMode> GetSubjectEx(int gradeid)
      {
          return subjectDal.GetSubjectEx(gradeid);
      }
    }
}