public void OnGet(int id)
{
Course = _courseSerervice.GetCourseById(id);
var groups = _courseSerervice.GetGroupForManageCourse();
ViewData["Groups"] = new SelectList(groups, "Value", "Text", Course.GroupId);
List <SelectListItem> subgroup = new List <SelectListItem>()
{
new SelectListItem()
{
Text = "انتخاب کنید", Value = ""
}
};
subgroup.AddRange(_courseSerervice.GetSubGroupForManageCourse(Course.GroupId));
var subgroups = _courseSerervice.GetSubGroupForManageCourse(Course.GroupId);
ViewData["SubGroups"] = new SelectList(subgroups, "Value", "Text", Course.SubGroup ?? 0);
var teachers = _courseSerervice.GetTeachers();
ViewData["Teachers"] = new SelectList(teachers, "Value", "Text", Course.TeacherId);
var levels = _courseSerervice.GetLevels();
ViewData["Levels"] = new SelectList(levels, "Value", "Text", Course.LevelId);
var status = _courseSerervice.GetStatus();
ViewData["Statues"] = new SelectList(status, "Value", "Text", Course.StatusId);
}