C#文件和文件夹操作

//1.文件夹创建、移动、删除---------
//创建文件夹
Directory.CreateDirectory(Server.MapPath("a"));
Directory.CreateDirectory(Server.MapPath("b"));
Directory.CreateDirectory(Server.MapPath("c"));
//移动b到a
Directory.Move(Server.MapPath("b"), Server.MapPath("a\\b"));
//删除c
Directory.Delete(Server.MapPath("c"));

//2.文件创建、复制、移动、删除---------
//创建文件
//使用File.Create创建再复制/移动/删除时会提示：文件正由另一进程使用,因此该进程无法访问该文件
//改用 FileStream 获取 File.Create 返回的 System.IO.FileStream 再进行关闭就无此问题
FileStream fs;
fs = File.Create(Server.MapPath("a.txt"));
fs.Close();
fs = File.Create(Server.MapPath("b.txt"));
fs.Close();
fs = File.Create(Server.MapPath("c.txt"));
fs.Close();
//复制文件
File.Copy(Server.MapPath("a.txt"), Server.MapPath("a\\a.txt"));
//移动文件
File.Move(Server.MapPath("b.txt"), Server.MapPath("a\\b.txt"));
File.Move(Server.MapPath("c.txt"), Server.MapPath("a\\c.txt"));
//删除文件
File.Delete(Server.MapPath("a.txt"));

//3.遍历文件夹中的文件和子文件夹并显示其属性---------
if(Directory.Exists(Server.MapPath("a")))
{
     //所有子文件夹
     foreach(string item in Directory.GetDirectories(Server.MapPath("a")))
     {
         Response.Write("<b>文件夹：" + item + "</b><br/>");
         DirectoryInfo directoryinfo = new DirectoryInfo(item);
         Response.Write("名称：" + directoryinfo.Name + "<br/>");
         Response.Write("路径：" + directoryinfo.FullName + "<br/>");
         Response.Write("创建时间：" + directoryinfo.CreationTime + "<br/>");
         Response.Write("上次访问时间：" + directoryinfo.LastAccessTime + "<br/>");
         Response.Write("上次修改时间：" + directoryinfo.LastWriteTime + "<br/>");
         Response.Write("父文件夹：" + directoryinfo.Parent + "<br/>");
         Response.Write("所在根目录：" + directoryinfo.Root + "<br/>");
         Response.Write("<br/>");
     }

     //所有子文件
     foreach (string item in Directory.GetFiles(Server.MapPath("a")))
     {
         Response.Write("<b>文件：" + item + "</b><br/>");
         FileInfo fileinfo = new FileInfo(item);
         Response.Write("名称：" + fileinfo.Name + "<br/>");
         Response.Write("扩展名：" + fileinfo.Extension +"<br/>");
         Response.Write("路径：" + fileinfo.FullName +"<br/>");
         Response.Write("大小：" + fileinfo.Length +"<br/>");
         Response.Write("创建时间：" + fileinfo.CreationTime +"<br/>");
         Response.Write("上次访问时间：" + fileinfo.LastAccessTime +"<br/>");
         Response.Write("上次修改时间：" + fileinfo.LastWriteTime +"<br/>");
         Response.Write("所在文件夹：" + fileinfo.DirectoryName +"<br/>");
         Response.Write("文件属性：" + fileinfo.Attributes +"<br/>");
         Response.Write("<br/>");
     }
}
//4.文件读写---------
if (File.Exists(Server.MapPath("a\\a.txt")))
{
     StreamWriter streamwrite = new StreamWriter(Server.MapPath("a\\a.txt"));
     streamwrite.WriteLine("木子屋");
     streamwrite.WriteLine("http://www.mzwu.com/");
     streamwrite.Write("2008-04-13");
     streamwrite.Close();

     StreamReader streamreader = new StreamReader(Server.MapPath("a\\a.txt"));
     Response.Write(streamreader.ReadLine());
     Response.Write(streamreader.ReadToEnd());
     streamreader.Close();
}