C# 对文件操作自我总结

if (System.IO.Directory.Exists(Server.MapPath(System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString())) == false) //判断文件夹是否存在 { System.IO.Directory.CreateDirector

 if (system.io.directory.exists(server.mappath(system.datetime.now.year.tostring() + "-" + system.datetime.now.month.tostring() + "-" + system.datetime.now.day.tostring())) == false)  //判断文件夹是否存在
 {
     system.io.directory.createdirectory(server.mappath(system.datetime.now.year.tostring() + "-" + system.datetime.now.month.tostring() + "-" + system.datetime.now.day.tostring()));  //创建文件夹
 }
 system.io.directory.delete(server.mappath(system.datetime.now.year.tostring() + "-" + system.datetime.now.month.tostring() + "-" + system.datetime.now.day.tostring()), true);  //删除文件夹

 if (System.IO.File.Exists(Server.MapPath(System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + "/chenes.txt")))
 {//存在文件
     System.IO.File.Delete(Server.MapPath(System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + "/chenes.txt"));
 }
 else
 {
     //不存在文件
     System.IO.File.CreateText(Server.MapPath(System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString() + "-" + System.DateTime.Now.Day.ToString() + "/chenes.txt"));//创建该文件
 }