protected void Page_Load(object sender, EventArgs e) { string dirName = @"C:\Builds"; HierarchicalFolderIEnumearable folders = new HierarchicalFolderIEnumearable(dirName); buildPlatformsTreeView.DataSource = folders; buildPlatformsTreeView.DataBind(); buildPlatformsTreeView.Nodes[0].Select(); buildPlatformsTreeView_SelectedNodeChanged(null, null); }