public bool SearchLinkedListItem(LinkedList <Student> StudentList, Student StudentObject)
{
if (StudentList == null)
{
StudentList = new LinkedList <Student>();
}
return(StudentList.Contains(StudentObject));
}
private void RefreshExecute()
{
_studentDB.RefreshDBContext(); //Refresh DBContext
_firmenDB.RefreshDBContext();
_dozentDB.RefreshDBContext();
StudentList = _studentDB.GetAllStudents(); //Get all students into StudentList
FirmaList = _firmenDB.GetAllFirmen(); //Get all Firmen into FirmaList
DozentList = _dozentDB.GetAllDozents(); //Get all DozentNames into DozentList
if (StudentList.Contains(SelectedStudent))
{
SelectedStudent = _studentDB.RefreshEntity(SelectedStudent); //Refresh the currently selected student
}
//If currently selected Student had already been deleted in database by another user, then set to the first item in list
else
{
MessageBox.Show("Die ausgewählten Daten sind nicht mehr in der Datenbank verfügbar.", "Information", MessageBoxButton.OK, MessageBoxImage.Information);
SelectedStudent = StudentList[0];
}
}
