/// <summary>
/// Changes Student GradePointState from one state to another depending on the GradePointAverage.
/// </summary>
/// <param name="student">Student object</param>
public override void StateChangeCheck(Student student)
{
// Go to higher neighboring sibling: HONOURSSTATE
if (student.GradePointAverage > this.UpperLimit)
{
student.GradePointStateId = HonoursState.GetInstance().GradePointStateId;
}
// Go to lower neighboring sibling: PROBATIONSTATE
if (student.GradePointAverage < this.LowerLimit)
{
student.GradePointStateId = ProbationState.GetInstance().GradePointStateId;
}
db.SaveChanges();
}
/// <summary>
/// Checks for an existing HonoursState instance.
/// Instantiates an HonoursState and populates it to the database if there is none.
/// </summary>
/// <returns>honourState : instance of the HonoursState sub class</returns>
public static HonoursState GetInstance()
{
if (honoursState == null)
{
BITCollege_MGContext db = new BITCollege_MGContext();
honoursState = db.HonoursStates.SingleOrDefault();
if (honoursState == null)
{
HonoursState honoursState = new HonoursState();
db.HonoursStates.Add(honoursState);
db.SaveChanges();
}
}
return(honoursState);
}
