// Initializes a new instance of the Studentviewmodel class.
public StudentViewModel(IStudentDB studentDB, IPraktikaDB praktikaDB, IFirmenDB firmenDB, IDozentDB dozentDB, IDialogService dialogservice)
{
try
{
_studentDB = studentDB;
_praktikaDB = praktikaDB;
_firmenDB = firmenDB;
_dozentDB = dozentDB;
_dialogservice = dialogservice;
//Student Commands
RefreshCommand = new RelayCommand(RefreshExecute);
NewStudentCommand = new RelayCommand(NewStudentExecute);
SaveStudentCommand = new RelayCommand(SaveStudentExecute, CanSaveStudent);
CancelStudentCommand = new RelayCommand(CancelStudentExecute);
DeleteStudentCommand = new RelayCommand(DeleteStudentExecute, CanDeleteStudent);
PrintReportCommand = new RelayCommand(PrintReportExecute, CanPrintReportExecute);
//Praktika Commands
NewPraktikaCommand = new RelayCommand(NewPraktikaExecute, CanNewPraktikaExecute);
NextCommand = new RelayCommand(NextExecute, CanNextExecute);
PreviousCommand = new RelayCommand(PreviousExecute, CanPreviousExecute);
SavePraktikaCommand = new RelayCommand(SavePraktikaExecute);
CancelPraktikaCommand = new RelayCommand(CancelPraktikaExecute);
StudentList = new ObservableCollection <Student>();
StudentList = _studentDB.GetAllStudents();
FirmaList = new ObservableCollection <Firmen>();
FirmaList = _firmenDB.GetAllFirmen();
DozentList = new ObservableCollection <Dozent>();
DozentList = _dozentDB.GetAllDozents();
SelectedStudent = StudentList[0];
TempSelectedStudent.IsOkChanged += OnTempSelectedStudentPropertyChanged;
StudiengangItems = new ObservableCollection <string>
{
"BA BWL Präsenz",
"BA W-Informatik Präsenz",
"BA BWL online",
"BA BWL TZ online",
"BA W-Informatik online",
"MA BWL non-konsekutiv"
};
}
catch (Exception e)
{
throw e;
}
}
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];
}
}
