One can use the treeview control, can be applied directly.

SkyTreeViewControl_open.bmp
temp.js
tree.bmp
treedemo.xml
TreeViewNodeXml.aspx
TreeViewNodeXml.aspx.cs
TreeViewNodeXml.aspx.resx
treeviewsample.htm
Web.config
bin
...\CS_Discovery.dll
...\CS_Discovery.pdb
obj
...\ASPNETTreeView.csproj.FileList.txt
...\ASPNETTreeView.csproj.FileListAbsolute.txt
...\Debug
...\.....\ASPNETTreeView.csproj.GenerateResource.Cache
...\.....\CS_Discovery.dll
...\.....\CS_Discovery.pdb
...\.....\CS_Discovery.SkyTreeViewControl.bmp
...\.....\CS_Discovery.SkyTreeViewControl.xslt
...\.....\CS_Discovery.TreeViewNodeXml.resources
...\.....\CS_Discovery._Default.resources
...\.....\Refactor
...\.....\TempPE
Properties
..........\AssemblyInfo.cs
ASPNETTreeView.csproj
ASPNETTreeView.csproj.user
customer.bmp
Default.aspx
Default.aspx.cs
Default.aspx.designer.cs
Default.aspx.resx
order.bmp
product.bmp
SkyDemo.mdb
SkyTreeNode.cs
SkyTreeNodeList.cs
SkyTreeViewControl.bmp
SkyTreeViewControl.cs
SkyTreeViewControl.xslt
SkyTreeViewControl_child.gif
SkyTreeViewControl_close.bmp
SkyTreeViewControl_collapse.gif
SkyTreeViewControl_default.bmp
SkyTreeViewControl_expend.gif
SkyTreeViewControl_lastchild.gif
SkyTreeViewControl_lastcollapse.gif
SkyTreeViewControl_lastexpend.gif
SkyTreeViewControl_line.gif

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