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  4. Expanding and collapsing the nodes of the TreeView control programmatically (VB)
<%@ Page Language="VB" %>
    
   Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        TreeView1.ExpandAll()
   End Sub
    
   Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        TreeView1.CollapseAll()
   End Sub



    TreeView Control


    
        


                         OnClick="Button1_Click" />
                         OnClick="Button2_Click" />
            
            
                 DataSourceId="SiteMapDataSource1">
        
        


    


File: Web.sitemap