public Lop[] getListLop()
{
string sqlCmd = "SELECT * FROM Lop";
DataTable d = DBHelper.DBExcuteQuery(sqlCmd);
int count = d.Rows.Count;
Lop[] results = new Lop[count];
for (int i = 0; i < count; i++)
{
results[i] = GetLopFromDataRow(d.Rows[i]);
}
return(results);
}
public Student[] getListStudentByClass(Lop lop)
{
return(studentDAL.getAllStudents().Where(item => item.ID_Lop == lop.IDLop).ToArray());
}