/// <summary>
/// Allow choosing only the courses that the selected teacher can teach
/// </summary>
private void ShowSelectedTeacherCourses()
{
// Reset the teacher's available courses collection
TeacherAvailableCourses.Clear();
if (SelectedTeacher != NOT_ASSIGNED)
{
// Get the selected teacher's information
Teacher selectedTeacher = _schoolData.Teachers.Find(SelectedTeacher);
bool isHomeroomTeacherClass = selectedTeacher.classID == SelectedClass;
// Update the teacher courses collection with this teaher's courses
TeacherAvailableCourses =
new ObservableDictionary <int, string>(TeacherCoursesHandler.GetTeacherCoursesNames(selectedTeacher, isHomeroomTeacherClass));
}
// Update the selected course per the new courses collection
if (TeacherAvailableCourses.Count() > 0)
{
SelectedCourse = TeacherAvailableCourses.First().Key;
}
else
{
SelectedCourse = NOT_ASSIGNED;
}
// For some reason, after re-initializing a collection, a related selection in it is not updated properly in the view unless called explicitly
OnPropertyChanged("SelectedCourse");
}
/// <summary>
/// Get the names of all the courses a teacher teaches
/// </summary>
/// <param name="teacher">The teacher</param>
/// <returns>String with the names of all the teacher's courses</returns>
private string GetTeacherCourseNames(Teacher teacher)
{
string courseNames = string.Empty;
// Get the name of each course the teacher teaches
foreach (string teacherCourseName in TeacherCoursesHandler.GetTeacherCoursesNames(teacher, false).Values)
{
courseNames += teacherCourseName + ", ";
}
// Remove the last ', '
courseNames = courseNames.Substring(0, courseNames.Length - 2);
return(courseNames);
}
/// <summary>
/// Gather all the courses a specific teacher teaches
/// </summary>
/// <param name="teacher">The teacher to use</param>
private void GatherTeacherCourses(Teacher teacher)
{
// Reset the Courses collection to fit the current teacher
Courses = new ObservableDictionary <int, string>(TeacherCoursesHandler.GetTeacherCoursesNames(teacher, true));
// Automatically select a course if possible
if (Courses.Count() > 0)
{
SelectedCourse = Courses.First().Key;
}
else
{
SelectedCourse = NOT_ASSIGNED;
}
// For some reason the selections are not updated properly in the view unless called again
OnPropertyChanged("SelectedCourse");
}
