public void DeleteTg(int tgid)
{
TeacherDal teadal = new TeacherDal();
DBSession db = new DBSession();
ThemeDal thdal = new ThemeDal();
IQueryable <TeaGroup> iq = tgdal.GetEntities(u => u.TG_Id == tgid);
TeaGroup tg = new TeaGroup();
foreach (var item in iq)
{
tg = item;
}
if (tgdal.DeleteEntity(tg) != null)
{
IQueryable <Teacher> tiq = teadal.GetEntities(u => u.TeaGroup == tg);
foreach (var item in tiq)
{
item.TeaGroup = null;
}
IQueryable <Theme> theiq = thdal.GetEntities(u => u.TeaGroup == tg);
foreach (var item in theiq)
{
item.TeaGroup = null;
}
}
;
db.SaveChanges();
}
