private void DataBind() { str_JykCode = xtbiz.GetXtCsz("JykCode");//检验科代码 DataTable dt_tj_lclxb = lisbiz.Get_TJ_LCLXB(); foreach (DataRow dr in dt_tj_lclxb.Rows) { TreeNode node1 = new TreeNode(dr["mc"].ToString()); string str_lclx = dr["lclx"].ToString(); DataTable dt_tj_tjxmb = lisbiz.Get_TJ_TJXMB(str_JykCode, str_lclx); foreach (DataRow drs in dt_tj_tjxmb.Rows) { TreeNode node2 = new TreeNode(); node2.Text = drs["mc"].ToString(); node2.Tag = drs["tjxm"].ToString(); node1.Nodes.Add(node2); } tv_jyxm.Nodes.Add(node1); } }