using System; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; public class Populate: Page { public void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e) { if (e.Node.Depth > 4) return; for (int n = 0; n < (e.Node.Depth+1) * 2; n++) { string label = string.Empty; if (e.Node.Depth < 1) label = "Node"; else label = e.Node.Text; if (Char.IsDigit(label.ToCharArray()[label.Length-1])) { label += " " + (char)(n + 65); } else { label += " " + n; } TreeNode nod = new TreeNode(label); //TreeNode nod = new TreeNode("Node " + e.Node.Depth + " " + n); nod.PopulateOnDemand = true; e.Node.ChildNodes.Add(nod); } } }