protected void FillCategories(DataSet dsContent, ref Telerik.Web.UI.RadTreeView treeView) { treeView.DataBind(); if (treeView.Nodes.Count > 0) { if (dsContent.Tables.Count > 0) for (int i = 0; i < dsContent.Tables[0].Rows.Count; i++) { Telerik.Web.UI.RadTreeNode node = (Telerik.Web.UI.RadTreeNode)treeView.FindNodeByValue(dsContent.Tables[0].Rows[i]["CategoryID"].ToString()); if (node != null) node.Checked = true; } } }