protected override void OnDropDownOpened(EventArgs e)
{
base.OnDropDownOpened(e);
DropDownForm.UpdatePerferedSize(Size);
var expression = Expression;
object selectedItem = null;
foreach (var item in _listBox.Items)
{
var valueItem = item as ScriptValueList.ValueItem;
if (valueItem == null)
{
continue;
}
var itemExpression =
ScriptValueHelper.TextToObject(valueItem.Text, typeof(ScriptStringValue), valueItem.IsExpression).ToString();
if (expression == itemExpression)
{
selectedItem = item;
break;
}
}
_listBox.SelectedItem = selectedItem;
}
private void UpdateDropDown()
{
DropDownForm.Items.Clear();
foreach (object v in _enumValues)
{
DropDownForm.Items.Add(new DropDownListBox.Item(v.ToString(), v));
}
DropDownForm.UpdatePerferedSize(Size);
}