在C#.net中仅显示搜索树节点

大家好，
在执行节点搜索时，我在widowsform应用程序中有树视图，我需要隐藏所有剩余节点，并且只需要显示搜索到的节点及其父节点.
grandParent
Parent1
child1
child2
child3.
parent2
child4
child5
如果搜索到的节点是< b>子3</b>.我需要把输出显示为..


grandParent
Parent1
child3
所有的小动物都要躲起来.
请问有人在帮我吗?
在此先感谢...

hi To ALL,
I have treeview in widowsform application when searching for node is performed i need to hide all the remainig node and i need to show only the searched node and its parent .like

grandParent
Parent1
child1
child2
child3.
parent2
child4
child5
if the searched node is <b>child 3</b> i need to show the out put as..


grandParent
Parent1
child3
all auother are to be Hide..
is any one worked on this pls Help me......
Thank in advance...