C#文件操作

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C#常用的文件操作
C#写入/读出文本文件
public void Page_Load(Object src,EventArgs e)
{
   StreamWriter rw = File.CreateText(Server.MapPath(".")+"[url=file://mytext.txt/]//myText.txt[/url]");
   rw.WriteLine("追逐理想");
   rw.WriteLine("kzlll");
   rw.WriteLine(".NET笔记");
   rw.Flush();
   rw.Close();
}
打开文本文件
StreamReader sr = File.OpenText(Server.MapPath(".")+"[url=file://mytext.txt/]//myText.txt[/url]");
StringBuilder output = new StringBuilder();
string rl;
while((rl=sr.ReadLine())!=null)
{
output.Append(rl+"<br>");
}
lblFile.Text = output.ToString();
sr.Close();

C#追加文件
    StreamWriter sw = File.AppendText(Server.MapPath(".")+"[url=file://mytext.txt/]//myText.txt[/url]");
    sw.WriteLine("追逐理想");
    sw.WriteLine("kzlll");
    sw.WriteLine(".NET笔记");
    sw.Flush();
    sw.Close();
C#拷贝文件
        string OrignFile,NewFile;
        OrignFile = Server.MapPath(".")+"[url=file://mytext.txt/]//myText.txt[/url]";
        NewFile = Server.MapPath(".")+"[url=file://mytextcopy.txt/]//myTextCopy.txt[/url]";
        File.Copy(OrignFile,NewFile,true);
C#删除文件
        string delFile = Server.MapPath(".")+"[url=file://mytextcopy.txt/]//myTextCopy.txt[/url]";
        File.Delete(delFile);
C#移动文件
      string OrignFile,NewFile;
      OrignFile = Server.MapPath(".")+"[url=file://mytext.txt/]//myText.txt[/url]";
      NewFile = Server.MapPath(".")+"[url=file://mytextcopy.txt/]//myTextCopy.txt[/url]";
      File.Move(OrignFile,NewFile);
C#创建目录
          // 创建目录c:/sixAge
          DirectoryInfo d=Directory.CreateDirectory("c://sixAge");
          // d1指向c:/sixAge/sixAge1
          DirectoryInfo d1=d.CreateSubdirectory("sixAge1");
          // d2指向c:/sixAge/sixAge1/sixAge1_1
          DirectoryInfo d2=d1.CreateSubdirectory("sixAge1_1");
          // 将当前目录设为c:/sixAge
          Directory.SetCurrentDirectory("c://sixAge");
          // 创建目录c:/sixAge/sixAge2
          Directory.CreateDirectory("sixAge2");
          // 创建目录c:/sixAge/sixAge2/sixAge2_1
          Directory.CreateDirectory("sixAge2//sixAge2_1");

递归删除文件夹及文件
<%@ Page Language=C#%>
<%@ Import namespace="System.IO"%>
<Script runat=server>
public void DeleteFolder(string dir)
{
     if (Directory.Exists(dir))   //如果存在这个文件夹删除之
       {
           foreach(string d in Directory.GetFileSystemEntries(dir))
              {
                 if(File.Exists(d))
                 File.Delete(d);    //直接删除其中的文件
                 else
                 DeleteFolder(d);       //递归删除子文件夹
               }
            Directory.Delete(dir);    //删除已空文件夹
            Response.Write(dir+" 文件夹删除成功");
        }
     else
        Response.Write(dir+" 该文件夹不存在"); //如果文件夹不存在则提示
}
protected void Page_Load (Object sender ,EventArgs e)
{
string Dir="D://gbook//11";
DeleteFolder(Dir);           //调用函数删除文件夹
}
</Script>

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