public ObservableCollection <CourseGroup> getCourseGroupsByClassId(int classid)
{
ObservableCollection <CourseGroup> courseGroupsByClassid = new ObservableCollection <CourseGroup>();
string coursegroupsids = "";
foreach (ClassCourse cc in classCourses)
{
if (cc.classid == classid)
{
coursegroupsids = cc.coursesid; break;
}
}
if (!coursegroupsids.Equals(""))
{
// start to handle the string.
string[] ids = coursegroupsids.Split('|');
foreach (string id in ids)
{
int coursegroupid = Int32.Parse(id);
courseGroupsByClassid.Add(CourseWeekViewModel.getInstance().getCourseGroupById(coursegroupid));
}
}
return(courseGroupsByClassid);
}
public void initData()
{
//Confirmation all teachers, grades and classes have loaded.
if (!ClassViewModel.getInstance().mIsInitialized)
{
ClassViewModel.getInstance().worker_initData();
}
//confirmation all course groups and locations has loaded.
if (!CourseWeekViewModel.getInstance().mIsInitialized)
{
CourseWeekViewModel.getInstance().worker_initDataFromDatabase(false);
}
//Get the current user's id.
MemberBasic currentUser = (MemberBasic)Application.Current.Properties["currentUser"];
int basicid = 0;
if (currentUser != null)
{
basicid = currentUser.id;
}
selectedClassid = DatabaseHelper.getClassIdByHeadTeacherId(basicid);
classCourses = DatabaseHelper.getClassCoursesByTeacherId(basicid);
//find the class which the teacher has teached.
foreach (ClassCourse cc in classCourses)
{
classes.Add(ClassViewModel.getInstance().getClassById(cc.classid));
}
courseGroups = getCourseGroupsByClassId(selectedClassid);
selectedCourseid = courseGroups[0].id;
//start load course cards.
currentCourseCards = DatabaseHelper.getAllCourseCards(selectedClassid, selectedCourseid);
}