Controlling treeview items postback

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ASP.NET

XML

treeview

I am trying to make a useable treeview that has been populated from an XML source:

<asp:TreeView ID="TreeView1" runat="server" DataSourceID="Data">
    <DataBindings>
            <asp:TreeNodeBinding DataMember="City" ValueField="name" TextField="name" SelectAction=None>
            </asp:TreeNodeBinding>
            <asp:TreeNodeBinding DataMember="Device" ValueField="name" TextField="name" SelectAction=None>
            </asp:TreeNodeBinding>
            <asp:TreeNodeBinding DataMember="IP" ValueField="num" TextField="num">
            </asp:TreeNodeBinding>
             <asp:TreeNodeBinding DataMember="Model" ValueField="num" TextField="num" SelectAction=None>
            </asp:TreeNodeBinding>
        </DataBindings>
    </asp:TreeView>
<asp:XmlDataSource ID="Data" DataFile="C:\Data.xml" runat="server"/

I would like to have the IP be a link to open the web interface in a different frame but I am not sure how to control the postback behavior that I see when I run the project.

Can someone please point me in the right direction? I've been reading up on postback but haven't found out how to control a dynamically created treeview item.