Expanding and collapsing the nodes of the TreeView control programmatically (VB) : TreeView « Asp Control « ASP.Net






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Expanding and collapsing the nodes of the TreeView control programmatically (VB)


<%@ Page Language="VB" %>

<script runat="server" 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
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>TreeView Control</title>
</head>
<body>
    <form id="Form1" runat="server">
        <p>
            <asp:Button ID="Button1" Runat="server" Text="Expand Nodes" 
             OnClick="Button1_Click" />
            <asp:Button ID="Button2" Runat="server" Text="Collapse Nodes" 
             OnClick="Button2_Click" />
            <br />
            <br />
        <asp:TreeView ID="TreeView1" Runat="server" 
         DataSourceId="SiteMapDataSource1">
        </asp:TreeView>
        <asp:SiteMapDataSource ID="SiteMapDataSource1" Runat="server" /></p>
    </form>
</body>
</html>

File: Web.sitemap

<?xml version="1.0" encoding="utf-8" ?>
    
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
   
   <siteMapNode title="Home" description="Home Page" url="Default.aspx">
      <siteMapNode title="News" description="The Latest News" url="News.aspx">
         <siteMapNode title="U.S." description="U.S. News" url="News.aspx?cat=us" />
         <siteMapNode title="World" description="World News" url="News.aspx?cat=world" />
         <siteMapNode title="Technology" description="Technology News" url="News.aspx?cat=tech" />
         <siteMapNode title="Sports" description="Sports News" url="News.aspx?cat=sport" />
      </siteMapNode>
      <siteMapNode title="Weather" description="The Latest Weather" url="Weather.aspx" />
   </siteMapNode>
</siteMap>








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