On Tree Node Populate Event (C#)
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">
void TreeView1_TreeNodePopulate(object s, TreeNodeEventArgs e)
{
for (int i=0;i<5;i++)
{
TreeNode newNode = new TreeNode();
newNode.Text = String.Format("{0}.{1}", e.Node.Text, i);
newNode.PopulateOnDemand = true;
e.Node.ChildNodes.Add(newNode);
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>TreeView Populate On Demand</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<%=DateTime.Now.ToString("T") %>
<hr />
<asp:TreeView
ID="TreeView1"
ExpandDepth="0"
OnTreeNodePopulate="TreeView1_TreeNodePopulate"
Runat="server">
<Nodes>
<asp:TreeNode
PopulateOnDemand="true"
Text="Node 0" />
</Nodes>
</asp:TreeView>
</div>
</form>
</body>
</html>
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