读取数据库 生成Xml节点

 foreach (DataColumn v in dt.Columns)
            {
                sb.Append("sb.Append(\"<" + v.ColumnName.ToUpper() + ">\");\r\n");
                sb.Append("sb.Append(info." + v.ColumnName + ");\r\n");
                sb.Append("sb.Append(\"</" + v.ColumnName.ToUpper() + ">\");\r\n"); 
            }