C#中把日志导出到txt文本的简单实例

/// <summary>
        /// 打日志
        /// </summary>
        /// <param name="log"></param>

        //首先还是要using system.io;    
        public void write(arraylist log)
            {
                      //将文件保存在桌面，文件名称为当前时间.txt
                filestream fs = new
                                  filestream("c:\\users\\ailin\\desktop\\" +
                                  datetime.now.tolongtimestring().replace(":", "") + ".txt", filemode.openorcreate, fileaccess.readwrite);
                    streamwriter sw = new streamwriter(fs, encoding.default);
                    foreach( string i in log)
                    {

                            sw.write(i.tostring());

                    }
                     datetime dt1 = datetime.now;
                     sw.writeline();
                     sw.writeline("操作人：cxx");
                     sw.writeline("日期："+convert.tostring(dt1));
                     sw.flush();
                     sw.close();
            }

            //string ssaveexcelname =
        //"c:\\" + datetime.now.toshortdatestring().replace("-", "") + datetime.now.tolongtimestring().replace(":", "") + ".xls";
         public static arraylist achg_slab_len = new arraylist();
            private void button2_click(object sender, eventargs e)
            {

                    arraylist cx = new arraylist();

                    for (int i = 0; i < ss1.activesheet.rowcount; i++)
                    {
                        for (int j = 0; j < ss1.activesheet.columncount; j++)
                        {
                           cx.add(ss1.activesheet.cells[i, j].text);
                           cx.add("  ");
                        }
                        cx.add("\r\n");

                    }
                    //执行导出日志的操作
                    write(cx);
                    return;

            }