C# 代码笔记_文件

       string Route = @"D:\ksy\ksy\WebSite1\";//文件地址
        string File_name = "userfaceqwe.png";
        string New_File_name = "000.png";

        if (System.IO.File.Exists(Route+File_name))
        {
            System.IO.File.Move(Route + File_name, Route + New_File_name);
        } 

写日志用的

             string mapPath = @"/Log1";
             string fileName = string.Format("{0}/{1}.txt", mapPath, DateTime.Now.ToString("yyyy-MM-dd"));
             List<string> messages = new List<string>();

             messages.Add("-------------------------------------------------------------");
             messages.Add(" 反反复复付付付付付付付付付:" + Request.Form[" "] + "，状态：" + Request.QueryString["trade_status"] + " 宝 号:" + Request.Form[" "] + "总 " + Request.Form["total_fee"] + "responseTxt=" + responseTxt + " notify_url_log:sign=" + Request.Form["sign"] + "&mysign=" + mysign + " notify回来的参数：");
             foreach (string pastring in sArrary)
             {
                 messages.Add(pastring);
             }

             if (Directory.Exists(Server.MapPath(urlconvertor(mapPath))) == false)//如果不存在就创建file文件夹
             {
                 Directory.CreateDirectory(Server.MapPath(urlconvertor(mapPath)));//吧路径转成相对路径
             }
             File.AppendAllLines(HttpContext.Current.Server.MapPath(fileName), messages, System.Text.Encoding.UTF8);

     private string urlconvertor(string imagesurl1)
     {
         string tmpRootDir = Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录
         string imagesurl2 = imagesurl1.Replace(tmpRootDir, ""); //转换成相对路径
         imagesurl2 = imagesurl2.Replace(@"\", @"/");
         return imagesurl2;
     }