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

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ASP.Net » Asp Control » TreeView 
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>

 
Related examples in the same category
1.A basic TreeView control
2.A TreeView control with the MSDN style applied to it
3.Binding a TreeView control to the Data.xml file
4.Add check boxes to leaf nodes (C#)
5.Add check boxes to leaf nodes (VB)
6.Applying custom images to the TreeView control
7.Expanding and collapsing the nodes of the TreeView control programmatically (C#)
8.Expanding specific nodes programmatically
9.Expanding nodes programmatically using the Expanded property
10.Displaying database data with a TreeView control.
11.Using Populate On Demand and AJAX
12.Formatting the TreeView Control
13.Using Styles with the TreeView control.
14.Applying styles to different TreeView node levels.
15.Adding nodes programmatically to the TreeView control (C#)
16.Adding nodes programmatically to the TreeView control (VB)
17.Custom TreeView Control
18.Database tree
19.TreeView Populate On Demand
20.Test TreeView
21.TreeView DataBindings
22.Dynamic tree view
23.ParentNodeStyle in a TreeView
24.DirectoryInfo TreeView
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