TreeView递归取值

  string jingyuan = "";
        string jinghui = "";
        private void DiGui(TreeNode tn)
        {
            if (tn.Checked && tn.ImageUrl.Contains("jinghui"))
            {
                jinghui += tn.Text+",";
            }
            if (tn.Checked && tn.ImageUrl.Contains("jingyuan"))
            {
                jingyuan += tn.Text + ",";
            }
            foreach (TreeNode tnSub in tn.ChildNodes)
            {
                DiGui(tnSub);
            }
        }

 private bool DoAdd()
        {

            foreach (TreeNode node in TreeView1.Nodes)//递归获取TreeView节点值
            {
                DiGui(node);
            }
            JscriptMsg(jinghui+"|"+jingyuan, "");
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