public void Update()
{
DGR.ItemsSource = null;
CB_WorkingGroup.ItemsSource = null;
CB_People.ItemsSource = null;
using (var db = new ResourceModel())
{
DGR.ItemsSource = db.GetComputer();
CB_WorkingGroup.ItemsSource = db.GetWorking_Group();
CB_People.ItemsSource = db.GetPeople();
}
}
