求组,字符串写入文件,怎样实现新增而不是覆盖
字符串写入文件,怎样实现新增而不是覆盖,代码:
StreamWriter sw = File.CreateText(Server.MapPath("../11.txt"));//存入11.txt文件
sw.Write(timeStr + System.Environment.NewLine);
sw.Write("跳闸信息:"+paras + System.Environment.NewLine);
sw.Write("返回信息:"+a + System.Environment.NewLine + System.Environment.NewLine);
sw.Close();
sw.Dispose();