private void GraphFieldItemChangedLost(Object sender, GantChangedEvent arg)
 {
     comboBoxSelectItem.SelectedItem = null;
     comboBoxSelectItem.Text = "";
     if (SelectLostItem != null)
         SelectLostItem(this, arg);
 }
 private void GraphFieldItemChanged(Object sender, GantChangedEvent arg)
 {
     if (arg.SelectedItem.Index > 0)
     {
         foreach (object item in comboBoxSelectItem.Items)
             if (((ComboBoxItem)item).Index == arg.SelectedItem.Index)
             {
                 comboBoxSelectItem.SelectedItem = item;
                 break;
             }
     }
     else
     {
         comboBoxSelectItem.Text = "";
     }
     if (SelectItem != null)
         SelectItem(this, arg);
 }