如果要隐藏组的成员线程，可以使用树控件折叠组。
If you want to hide the member threads for a group, you can use the tree control to collapse the group.
第一个修改是使用树控件替换 “Refine By”（元数据）选项的显示。
The first is to replace the display of "Refine By" (metadata) options with a tree control.
然后，在后面的小节中，将了解如何使用树控件显示和选择元数据条件，从而改进文档搜索的用户界面。
Then in a later section, see how the user interface can be improved for document search by using a tree control for displaying and selecting the metadata conditions.
以前树形控件是通过清单和链接创建的，因此用户必须使用制表键跳到每个树项目。
Previously, tree controls were created out of lists and links so the user had to TAB to each tree item.
可以使用其中一些核心小部件作为UI控件，比如菜单小部件、选项卡集、树小部件等等。
You can use some of the core widgets as UI controls, such as the menu widget, tabs set, tree widget, and more.
最后，为树节点添加一些悬停文本并指定呈现它们时使用的css样式，这将导致产生具有可用的一致外观的树控件，如图4中所示。
Finally, adding some hover text to the tree nodes and specifying the CSS style to be used in rendering them results in a tree control with a usable, consistent look and feel, as shown in Figure 4.
换句话说，您必须使用FindControl来访问控件树。
In other words, you would have to access the control tree using FindControl.
遗憾的是，髧层次树也是工具箱中最容易被错误使用的控件之一。
Unfortunately, hierarchical trees are one of the most inappropriately used controls in the toolbox.
遗憾的是，层次树也是工具箱中最容易被错误使用的控件之一。
Unfortunately, hierarchical trees are one of the most inappropriately used controls in the toolbox.
遗憾的是，层次树也是工具箱中最容易被错误使用的控件之一。
Unfortunately, hierarchical trees are one of the most inappropriately used controls in the toolbox.
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