WPF TreeView 后台C#选中指定的Item， 需要遍历

  

        private TreeViewItem FindTreeViewItem(ItemsControl container, object item)

        {

            if (null == container || null == item)

            {

                return null;

            }

            if (container.DataContext == item)

            {

                return container as TreeViewItem;

            }

            int count = container.Items.Count;

            for (int i = 0; i < count; i++)

            {

                TreeViewItem subContainer = (TreeViewItem)container.ItemContainerGenerator.ContainerFromIndex(i);

                if (null == subContainer)

                {

                    continue;

                }

                // Search the next level for the object.

                TreeViewItem resultContainer = FindTreeViewItem(subContainer, item);

                if (null != resultContainer)

                {

                    return resultContainer;

                }

            }

            return null;

        }

/////使用上述方法遍历 ， 然后设置IsSelected属性

   private static void SelectedItemChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

        {

            //

            SelectedProtocolControl spc = d as SelectedProtocolControl;

            if (null != spc)

            {

                if (e.NewValue != spc.trvSelectedProtocol.SelectedItem)

                {

                    //TreeViewItem tviNew = spc.trvSelectedProtocol.ItemContainerGenerator.ContainerFromItem(e.NewValue) as TreeViewItem;

                    TreeViewItem tviNew = spc.FindTreeViewItem(spc.trvSelectedProtocol, e.NewValue);

                    if (null != tviNew)

                    {

                        tviNew.IsSelected = true;

                    }

                }

                if (null != e.OldValue)

                {

                    //TreeViewItem tviOld = spc.trvSelectedProtocol.ItemContainerGenerator.ContainerFromItem(e.OldValue) as TreeViewItem;

                    TreeViewItem tviOld = spc.FindTreeViewItem(spc.trvSelectedProtocol, e.OldValue);

                    if (null != tviOld)

                    {

                        tviOld.IsSelected = false;

                    }

                }

            }

            System.Diagnostics.Debug.WriteLine("SelectedItemChanged...");

        }