How to expand item in TreeVeiw

12-29-2008 8:43 AM |

  A try use this way:

                    treeViewSource.ItemsSource = items;

                    FCUWS.Item it = items[0];

                    TreeViewItem tvi = treeViewSource.ItemContainerGenerator.ContainerFromItem(it) as TreeViewItem;
                            if (tvi !=null)
                                  tvi.IsExpanded = true;

Re: How to expand item in TreeVeiw

01-01-2009 10:59 PM |

In fact before the TreeViewItem has expanded for one time, its children have not been generated. So that it container is null. When you have expanded the node once, this method will work.

I don't know other way to expand a TreeViewItem when page loaded or SelectionChanged, that is the TreeView control's limit, what a pity!

Regards!