// Create a new student with input from the user
private void NewStudent_Click(object sender, RoutedEventArgs e)
{
try
{
// Use the StudentDialog to get the details of the student from the user
StudentDialog sd = new StudentDialog();
// Display the form and get the details of the new student
if (sd.ShowDialog().Value)
{
// When the user closes the form, retrieve the details of the student from the form
// and use them to create a new Student object
Grades.DataModel.Student newStudent = new Grades.DataModel.Student();
newStudent.FirstName = sd.firstName.Text;
newStudent.LastName = sd.lastName.Text;
newStudent.User = new User();
if (!newStudent.User.SetPassword(Role.Student, sd.password.Text))
{
throw new Exception("Password must be at least 6 characters long. Student not created");
}
// Generate the UserName property - lastname with the initial letter of the first name all converted to lowercase
newStudent.User.UserName = (newStudent.LastName + newStudent.FirstName.Substring(0, 1)).ToLower();
// Generate a unique ID for the user
newStudent.UserId = Guid.NewGuid();
// Assign a value for the ImageName field
newStudent.ImageName = "No photo";
// Generate default values for remaining properties of user object
newStudent.User.ApplicationId = (from Grades.DataModel.User u in SessionContext.DBContext.Users select u.ApplicationId).FirstOrDefault();
newStudent.User.IsAnonymous = false;
newStudent.User.LastActivityDate = DateTime.Now;
newStudent.User.UserId = newStudent.UserId;
// Add the student to the Students collection
// TODO: Exercise 2: Task 2i: Use the AddToStudents method to add a new student
SessionContext.DBContext.AddToStudents(newStudent);
SessionContext.Save();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error creating new student", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
private void Student_Click(object sender, RoutedEventArgs e)
{
Button itemClicked = sender as Button;
if (itemClicked != null)
{
// Find out which student was clicked
Guid studentID = (Guid)itemClicked.Tag;
if (StudentSelected != null)
{
// Find the details of the student by examining the DataContext of the Button
Grades.DataModel.Student student = (Grades.DataModel.Student)itemClicked.DataContext;
// Raise the StudentSelected event (handled by MainWindow) to display the details for this student
StudentSelected(sender, new StudentEventArgs(student));
}
}
}
// Enroll a student in the teacher's class
private void Student_Click(object sender, RoutedEventArgs e)
{
try
{
// Determine which student the user clicked using the StudentID held in the Tag property of the Button that the user clicked
Button studentClicked = sender as Button;
Guid studentID = (Guid)studentClicked.Tag;
// Find this student in the Students collection
Grades.DataModel.Student student = (from s in SessionContext.DBContext.Students
where s.UserId == studentID
select s).First();
// Prompt the user to confirm that they wish to add this student to their class
string message = String.Format("Add {0} {1} to your class?", student.FirstName, student.LastName);
MessageBoxResult reply = MessageBox.Show(message, "Confirm", MessageBoxButton.YesNo, MessageBoxImage.Question);
// If the user confirms, add the student to their class
if (reply == MessageBoxResult.Yes)
{
// Get the ID of the currently logged-on teacher
Guid teacherID = SessionContext.CurrentTeacher.UserId;
// TODO: Exercise 3: Task 1a: Call the EnrollInClass method to assign the student to this teacher's class.
SessionContext.CurrentTeacher.EnrollInClass(student);
// TODO: Exercise 3: Task 1b: Save the updated student/class information back to the database.
SessionContext.Save();
// Refresh the display - the newly assigned student should disappear from the list of unassigned students
Refresh();
}
}
catch (Grades.DataModel.ClassFullException cfe)
{
MessageBox.Show(String.Format("{0}. Class: {1}", cfe.Message, cfe.ClassName), "Error enrolling student", MessageBoxButton.OK, MessageBoxImage.Error);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error enrolling student", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
public StudentEventArgs(Grades.DataModel.Student s)
{
Child = s;
}
