private async void DeleteTeacher()
{
TeacherEx teacherExss = SelectedUser as TeacherEx; //interresant. Alle personer kan findes ved at typecast fra user.
// TeacherEx teacherExss = ObjectHolder.Instance.TeacherList.FirstOrDefault(te => te.Id == selectedUser.Id);
if (teacherExss.ClassList.Count != 0)
{
var okornot = MessageBox.Show("Du kan ikke slette denne underviser, idet den har elever knyttet til sig." +
"du skal derfor først tilknytte en ny klasse til dine elever i denne klasse.\n" +
"Et nyt view vil åbnes, hvis du trykker ok.", "Sletning",
MessageBoxButton.OKCancel);
if (okornot == MessageBoxResult.OK)
{
DeleteView deleteView = new DeleteView(null, teacherExss);
deleteView.WindowStartupLocation = WindowStartupLocation.CenterScreen;
deleteView.ShowDialog();
deleteView.Closing += deleteView_Closing;
}
}
else if (teacherExss.ClassList.Count == 0)
{
await AreYouSureYouWantToDeleteUser(SelectedUser.Userrole); // vigtigt fordi den ellers g[r ind og lukker forbindelsen for sletningen af underviseren, hvis der ikke er tilknyttet born til ham.
}
await GetTeachers();
await GetClasses();
}
public DeleteView(ClassEx selectedClassEx = null, TeacherEx selectedTeacher = null) // tjek om det er teacherex eller class
{
InitializeComponent();
if (viewModel == null)
{
viewModel = new DeleteViewModel();
}
if (selectedClassEx != null) // er det teacher eller class der ønskes slettet?
{
viewModel.ViewstateObject = Enums.ViewstateObject.Class;
viewModel.CurrentClass = selectedClassEx;
datagridClassesEx.Visibility = Visibility.Hidden;
cbListofTeachers.Visibility = Visibility.Hidden;
butAssociate.Visibility = Visibility.Hidden;
}
else if (selectedTeacher != null)
{
viewModel.ViewstateObject = Enums.ViewstateObject.Teacher;
viewModel.CurrentTeacherEx = selectedTeacher;
listboxStudents.Visibility = Visibility.Hidden;
cbListofClasses.Visibility = Visibility.Hidden;
}
DataContext = viewModel;
InitializeEvents();
}
public Task <bool> InsertTeacher(TeacherEx teacher)//man gør dette fordi man vil have synkrone kald og ikke asykrone kald.
{
var tcs = new TaskCompletionSource <bool>();
EventHandler <InsertTeacherCompletedEventArgs> handler = null;
handler = (sender, args) =>
{
if (args.UserState == tcs)
{
service.InsertTeacherCompleted -= handler;
if (args.Error != null)
{
tcs.TrySetException(args.Error);
}
else if (args.Cancelled)
{
tcs.TrySetCanceled();
}
else
{
tcs.TrySetResult(args.Result);
}
}
};
service.InsertTeacherCompleted += handler;
service.InsertTeacherAsync(teacher, tcs);
return(tcs.Task);
}
public string GetAssociatedClasses(User user)
{
TeacherEx employee = (TeacherEx)user;
StringBuilder stringBuilder = new StringBuilder();
if (employee != null)
{
if (employee.ClassList.Count == 0)
{
stringBuilder.AppendLine("Denne ansat er ikke tilknyttet nogen klasse.");
}
else
{
stringBuilder.AppendLine("De tilknyttede klasser for ansat:" + employee.Firstname + " er:");
stringBuilder.AppendLine();
foreach (ClassEx classEx in employee.ClassList)
{
stringBuilder.AppendLine(classEx.Name);
}
}
}
return(stringBuilder.ToString());
}
public async Task <bool> CreateTeacher(TeacherEx teacher)
{
teacher.Lastlogin = DateTime.Now;
teacher.Password = PasswordHash.CreateHash(teacher.Birthdate); // spørgsmålet er om det hele ikke bare skal være på webservicen?? altså genereing af pass og lastlogin.
await ServiceProxy.Instance.InsertTeacher(teacher);
return(true);
}
/* public int GetMostRecentUserId()
* {
* return DatabaseHandler.Instance.GetMostRecentUserId();
* }*/
public bool InsertTeacher(TeacherEx teacher)
{
bool success = false;
if (teacher.Id != 0) // update
{
success = DatabaseHandler.Instance.UpdateTeacher(teacher);
}
else
{
success = DatabaseHandler.Instance.InsertTeacher(teacher); // will insert into User and Teacher.
}
return(success);
}
public List <TeacherEx> GetTeachers()
{
List <TeacherEx> teachers = new List <TeacherEx>();
try
{
DB.Open();
string[][] getTeachers = DB.Query("SELECT [User].Id, [USER].Firstname, [User].Lastname,[User].City, [User].Address," +
" [User].Birthdate,[User].Username, [User].Password, [User].Lastlogin, [User].Userrole, [User].PhoneNumber, [User].Email" +
" FROM [Teacher] INNER JOIN [User] ON [Teacher].Id=[User].Id ORDER BY [User].Firstname;");
for (int i = 0; i < getTeachers.Length; i++)
{
TeacherEx teacher = new TeacherEx();
teacher.Id = Convert.ToInt32(getTeachers[i][0]);
teacher.Fkuserid = Convert.ToInt32(getTeachers[i][0]);
teacher.Firstname = getTeachers[i][1];
teacher.Lastname = getTeachers[i][2];
teacher.City = getTeachers[i][3];
teacher.Address = getTeachers[i][4];
teacher.Birthdate = getTeachers[i][5];
teacher.Username = getTeachers[i][6];
teacher.Password = getTeachers[i][7];
if (getTeachers[i][8] == "")
{
getTeachers[i][8] = DateTime.MinValue.ToString();
}
teacher.Lastlogin = Convert.ToDateTime(getTeachers[i][8]);
teacher.Userrole = Convert.ToInt32(getTeachers[i][9]);
teacher.Phonenumber = Convert.ToInt32(getTeachers[i][10]);
teacher.Email = getTeachers[i][11];
teachers.Add(teacher);
}
}
catch (Exception ex)
{
}
finally
{
DB.Close();
}
return(teachers);
}
public bool UpdateTeacher(TeacherEx teacher)
{
bool success = true;
try
{
DB.Open();
DB.Exec("UPDATE [User] SET Firstname ='" + teacher.Firstname + "', Lastname='" + teacher.Lastname + "', City='" + teacher.City + "', Address='" + teacher.Address + "'," +
"Birthdate='" + teacher.Birthdate + "', Username='******', Password='******', Lastlogin ='******', Userrole=" + teacher.Userrole + ", PhoneNumber=" + teacher.Phonenumber + ", Email='" + teacher.Email + "' WHERE Id=" + teacher.Id + ";");
DB.Exec("UPDATE [Teacher] SET [Rank]=" + teacher.Rank + " WHERE Id=" + teacher.Id + ";");
}
catch (Exception)
{
Debug.Write("Fejl!");
success = false;
}
return(success);
}
public TeacherCuView(TeacherEx teacher = null) // se nok mere teacher som generics objekt
{
InitializeComponent();
if (viewModel == null)
{
viewModel = new TeacherCuViewModel();
}
viewModel.Viewstate = teacher == null ? Enums.ViewState.Create : Enums.ViewState.Edit;
if (teacher != null)
{
viewModel.CurrentTeacher = teacher; // vigtig eftersom jeg ikke får smidt de data som kom fra objektet med ind. Viewstate sættes i starten til create. Er efter linien ovenover blevet sat til edit.
}
this.DataContext = viewModel;
InitializeEvents();
}
public async void Confirm(Object o)
{
Isloading = true;
bool success = false;
if (Viewstate == Enums.ViewState.Create)
{
TeacherEx teacher = new TeacherEx();
teacher.Firstname = firstname;
teacher.Lastname = lastname;
teacher.City = city;
teacher.Birthdate = birthdate;
teacher.Address = address;
if (selectedRank == "Underviser")
{
teacher.Userrole = (int)Enums.Userrole.Teacher;
}
else if (selectedRank == "Vikar")
{
teacher.Userrole = (int)Enums.Userrole.Substitute;
}
else if (selectedRank == "Skoleleder")
{
teacher.Userrole = (int)Enums.Userrole.Principal;
}
// teacher.Userrole = (int)Enums.Userrole.Teacher; // it's in the view of teacher meaning the userrole will be 1.
teacher.Phonenumber = phonenumber;
teacher.Email = email;
success = await BusinessLogic.Instance.CreateTeacher(teacher);
}
else if (Viewstate == Enums.ViewState.Edit) // for next week!
{
// her vil det ikke være nødvendigt at oprette password, id og username.
// der skal tjekkes på om værdierne i tekstboksene er blevet ændret.
// sørg for at currentteacher kan være en ny instans. Så sparer du dette redudante udtryk.. saml attributterne der bliver sat til objektet.
CurrentTeacher.Firstname = firstname;
CurrentTeacher.Lastname = lastname;
CurrentTeacher.City = city;
CurrentTeacher.Birthdate = birthdate;
CurrentTeacher.Address = address;
if (selectedRank == "Underviser")
{
CurrentTeacher.Userrole = (int)Enums.Rank.Teacher;
}
else if (selectedRank == "Vikar")
{
CurrentTeacher.Userrole = (int)Enums.Rank.Substitute;
}
else if (selectedRank == "Skoleleder")
{
CurrentTeacher.Userrole = (int)Enums.Rank.Principal;
}
CurrentTeacher.Phonenumber = phonenumber;
CurrentTeacher.Email = email;
success = await BusinessLogic.Instance.UpdateTeacher(CurrentTeacher);
}
Isloading = false;
MessageBox.Show(success
? "Underviser er oprettet/opdateret! Vinduet lukkes."
: "Noget gik galt. Underviseren er ikke blevet oprettet/opdateret. Vinduet lukkes.");
OnTeacherViewClose();
}
public async Task <bool> UpdateTeacher(TeacherEx teacher)
{
await ServiceProxy.Instance.InsertTeacher(teacher);
return(true);
}
