private void SaveItem()
{
var newItem = new BusinessObject {
Name = SelectedItemName,
FirstName = SelectedItemFirstName,
Address = SelectedItemAddress,
PhoneNumber = SelectedItemPhoneNumber
};
DbService.AddItem(newItem.ConvertToItem());
newItem.ItemId = DbService.GetLastItemId();
Items.Add(newItem);
AddButtonVisibility = Constants.Visible;
SaveButtonVisibility = Constants.Collapsed;
LabelVisibility = Constants.Collapsed;
VisibilityTextBox = Constants.Collapsed;
}