public void expand()
{
if (!_isExpanded)
{
TreeNodeEventArgs e = new TreeNodeEventArgs(this, TreeNodeAction.Expand);
_owner._nodeBeforeExpand(this, e);
if (!e.Cancel)
{
_isExpanded = true;
_owner._nodeExpanded(this);
}
}
}
public void collapse()
{
if (_isExpanded)
{
TreeNodeEventArgs e = new TreeNodeEventArgs(this, TreeNodeAction.Collapse);
_owner._nodeBeforeCollapse(this, e);
if (!e.Cancel)
{
_isExpanded = false;
_owner._nodeCollapsed(this);
}
}
}