下面是treeview的用法

TreeView组件是由多个类来定义的，TreeView组件是由命名空

间"System.Windows.Forms"中的"TreeView"类来定义的，而其中的

节点(即Node)，是由命名空间"System.Windows.Forms"中

的"TreeNode"来定义的。所以当在程序中创建一个TreeView对象，

其实只是创建了一个可以放置节点的"容器"。而在这个容器中加入-The following is a TreeView use treeview from a number of types of components are defined, TreeView components are from the namespace " System.Windows.Forms"　in the " TreeView"　to define the category, and one of the nodes (that is, Node), are from the namespace " System.Windows.Forms"　in the " TreeNode"　defined. In the proceedings so as to create a TreeView object, in fact, only the creation of a node can be placed " containers."　And add at the container