1.在原有的DataTable上添加一行
DataTable dt = (DataTable)cboSelectTemplate.DataSource;
DataRow dr = dt.NewRow();
dr["paraCName"] = paraCName;
dr["remark"] = JsonConvert.SerializeObject(info);
dt.Rows.Add(dr);
原文：https://www.cnblogs.com/fzqm-lwz/p/11796122.html