/// <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;             }