public void ViewStudents_Apply(object sender, EventArgs args)
{
//If row not selected, return
if (!dgvStudentView.SelectedRow())
{
MessageBox.Show("Please select a row.");
return;
}
//Get the student course of selected student
Course_Schedule schedule = lcSchedules[cbCourses.SelectedIndex];
User student = lcStudents[dgvStudentView.SelectedRowIndex()];
Student_Course sCourse = student.GetStudentCourse(schedule);
//Update
sCourse.Grade = cbGrade.Text;
sCourse.ModifiedDateTime = DateTime.Now;
SharedManager.Update(sCourse, s => s.Grade, s => s.ModifiedDateTime);
//Show message
MessageBox.Show("Grade updated successfully", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
//Refresh grid view
ViewStudents_Refresh();
}
public static List <Student_Course> GetStudentCourses(this Course_Schedule context)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
return(dbContext.Student_Course.Where(sc => sc.IsActive && sc.CourseSchedule_ID.Equals(context.CourseSchedule_ID)).ToList());
}
}
public static bool Create(Course_Schedule source)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
try
{
Course_Schedule schedule = new Course_Schedule();
schedule.Course_ID = source.Course_ID;
schedule.CreatedBy = source.CreatedBy;
schedule.CreatedDateTime = DateTime.Now;
schedule.DT_From = source.DT_From;
schedule.DT_To = source.DT_To;
schedule.IsActive = true;
schedule.ModifiedBy = source.ModifiedBy;
schedule.ModifiedDateTime = DateTime.Now;
schedule.Teacher_ID = source.Teacher_ID;
dbContext.Course_Schedule.Add(schedule);
dbContext.SaveChanges();
}
catch (Exception)
{
return(false);
}
}
return(true);
}
public static User GetTutor(this Course_Schedule context)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
return(dbContext.Users.FirstOrDefault(t => t.User_ID.Equals(context.Teacher_ID) && t.IsActive));
}
}
public static List <Course_Schedule> GetSchedulesOf(User user, RoleTypes roleType)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
//Check role type
if (roleType == RoleTypes.Student)
{
//Find all student course object with the user's id
var selections = dbContext.Student_Course.Where(sc => sc.User_ID.Equals(user.User_ID) && sc.IsActive);
//Convert student_course to course_schedule
List <Course_Schedule> courseSchedules = new List <Course_Schedule>();
foreach (Student_Course sc in selections)
{
Course_Schedule cs = sc.GetSchedule();
if (cs != null)
{
courseSchedules.Add(cs);
}
}
//Return the list
return(courseSchedules);
}
else
{
//Return all course_schedules where its teacher_id equals the given user's id.
var selections = dbContext.Course_Schedule.Where(s => s.Teacher_ID.Equals(user.User_ID) && s.IsActive);
return(selections.ToList());
}
}
}
public static Course GetCourse(this Course_Schedule context)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
return(dbContext.Courses.FirstOrDefault(c => c.Course_ID.Equals(context.Course_ID) && c.IsActive));
}
}
public static Student_Course GetStudentCourse(this User context, Course_Schedule schedule)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
return(dbContext.Student_Course.FirstOrDefault(sc => sc.IsActive && sc.User_ID.Equals(context.User_ID) && sc.CourseSchedule_ID.Equals(schedule.CourseSchedule_ID)));
}
}
public void Add(object sender, EventArgs args)
{
#region Validate inputs
if (cbCourse.SelectedItem == null)
{
MessageBox.Show("Selected course is empty.");
return;
}
if (cbTutor.SelectedItem == null)
{
MessageBox.Show("Selected tutor is empty.");
return;
}
#endregion
//Create new schedule object
Course_Schedule schedule = new Course_Schedule();
schedule.Course_ID = lcCourses[cbCourse.SelectedIndex].Course_ID;
schedule.DT_From = dtpStart.Value;
schedule.DT_To = dtpEnd.Value;
schedule.CreatedBy = GlobalApplication.cMyUser.User_ID;
schedule.ModifiedBy = GlobalApplication.cMyUser.User_ID;
schedule.Teacher_ID = lcTutors[cbTutor.SelectedIndex].User_ID;
ScheduleManager.Create(schedule);
MessageBox.Show("Schedule has been successfully added.");
//Close
this.Close();
}
public static bool IsEnrolled(this User context, Course_Schedule schedule)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
return(dbContext.Student_Course.FirstOrDefault(c => c.IsActive && c.CourseSchedule_ID.Equals(schedule.CourseSchedule_ID) && c.User_ID.Equals(context.User_ID)) != null);
}
}
public void ManageSchedule_Delete(object sender, EventArgs args)
{
//Return if no cell is selected
if (!SelectedRow())
{
MessageBox.Show("Select a schedule first.");
return;
}
//Confirm if user wants to delete this record
if (MessageBox.Show("Are you sure you want to delete this schedule?", "Deleting Schedule", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
//Get the selected schedule info
Course_Schedule selection = lcSchedules[SelectedRowIndex()];
//Delete this selection
selection.IsActive = false;
SharedManager.Update(selection, s => s.IsActive);
//Refresh
RefreshGridView();
MessageBox.Show("Deleted schedule.");
}
}
public void FillGridView()
{
//Get all schedules
lcSchedules = ScheduleManager.GetAllSchedules();
//For each entry, add to data grid view
for (int i = 0; i < lcSchedules.Count; i++)
{
Course_Schedule curSchedule = lcSchedules[i];
Course curCourse = curSchedule.GetCourse();
User curTutor = curSchedule.GetTutor();
dgvSchedules.Rows.Add(curSchedule.CourseSchedule_ID, curCourse.Course_Name, curTutor.FullName, curSchedule.DT_From, curSchedule.DT_To);
}
dgvSchedules.Refresh();
}
public void FillLabels(int index)
{
//Selection
Course curCourse = lcCourses[index];
Course_Schedule curSchedule = lcSchedules[index];
Student_Course curStudentCourse = GlobalApplication.cMyUser.GetStudentCourse(curSchedule);
//Set label text
lbCourseName.Text = curCourse.Course_Name;
lbCourseCode.Text = curCourse.Course_Code;
lbGrade.Text = curStudentCourse.Grade;
lbTutorName.Text = curSchedule.GetTutor().FullName;
lbTutorEmail.Text = curSchedule.GetTutor().Email;
lbStartDate.Text = curSchedule.DT_From.ToString();
lbFinishDate.Text = curSchedule.DT_To.ToString();
lbDescription.Text = curCourse.Course_Description;
}
public static List <User> GetStudents(this Course_Schedule context)
{
using (KeunhongInstituteDBEntities dbContext = new KeunhongInstituteDBEntities())
{
//This holds student_courses of all students booked on this course_schedule.
var firstSelection = dbContext.Student_Course.Where(s => s.CourseSchedule_ID.Equals(context.CourseSchedule_ID) && s.IsActive);
List <User> students = new List <User>();
foreach (Student_Course sc in firstSelection)
{
User user = sc.GetStudent();
if (user != null)
{
students.Add(user);
}
}
return(students);
}
}
public void ManageCourse_Delete(object sender, EventArgs args)
{
//Return if no selection
if (!dgvCourses.SelectedRow())
{
MessageBox.Show("Please select a course.");
return;
}
//Confirm first
if (MessageBox.Show("Are you sure you want to delete this course?", "Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
//Select the target course
Course course = lcCourses[dgvCourses.SelectedRowIndex()];
//Disable it
course.IsActive = false;
SharedManager.Update(course, c => c.IsActive);
//Disable all schedules associated with this course
List <Course_Schedule> schedules = course.GetSchedules();
for (int i = 0; i < schedules.Count; i++)
{
Course_Schedule cs = schedules[i];
cs.IsActive = false;
SharedManager.Update(cs, x => x.IsActive);
//Disable all student courses associated with this schedule
List <Student_Course> studentCourses = cs.GetStudentCourses();
for (int j = 0; j < studentCourses.Count; j++)
{
Student_Course sc = studentCourses[j];
sc.IsActive = false;
SharedManager.Update(sc, x => x.IsActive);
}
}
MessageBox.Show("Course deleted successfully.");
RefreshCourse();
}
}
