public void DeleteInstructors(int[] instructorIds)
{
using (ClassAdministrationEntityContext context = new ClassAdministrationEntityContext(BUTEClassAdministrationService.Properties.Resources.connectionString))
{
var instructors = context.InstructorSet.Where(instructor => instructorIds.Contains(instructor.Id));
foreach (var instructor in instructors)
{
context.DeleteObject(instructor);
}
context.SaveChanges();
}
}
public void DeleteStudents(int[] studentIds)
{
using (ClassAdministrationEntityContext context = new ClassAdministrationEntityContext(BUTEClassAdministrationService.Properties.Resources.connectionString))
{
var students = context.StudentSet.Where(student => studentIds.Contains(student.Id));
foreach (var student in students)
{
context.DeleteObject(student);
}
context.SaveChanges();
}
}
public void DeleteGroups(int semesterId)
{
using (ClassAdministrationEntityContext context = new ClassAdministrationEntityContext(BUTEClassAdministrationService.Properties.Resources.connectionString))
{
var groups = context.GroupSet.Where(group => group.Semester.Id == semesterId);
foreach (var group in groups)
{
foreach (var student in group.Student)
{
student.Group = null;
}
}
foreach (var group in groups)
{
foreach (var student in group.Student)
{
context.DeleteObject(group);
}
}
context.SaveChanges();
}
}
