WPF TreeView 组织架构自动绑定数据 wpf treeview自动展开

/// <summary>
        /// 
        /// </summary>
        /// <param name="control">TreeView控件</param>
        /// <param name="expandNode">true:展开 false:收缩</param>
        private void SetNodeExpandedState(ItemsControl control, bool expandNode)
        {
            try
            {
                if (control != null)
                {
                    foreach (object item in control.Items)
                    {
                        TreeViewItem treeItem = control.ItemContainerGenerator.ContainerFromItem(item) as TreeViewItem;

                        if (treeItem != null && treeItem.HasItems)
                        {

                            treeItem.IsExpanded = expandNode;
                            if (treeItem.ItemContainerGenerator.Status != System.Windows.Controls.Primitives.GeneratorStatus.ContainersGenerated)
                            {
                                treeItem.UpdateLayout();
                            }

                            SetNodeExpandedState(treeItem as ItemsControl, expandNode);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Eastups.Utility.Logger.Write(LogType.Error, ex.Message.ToString());
            }
        }