C#文件写入,C#追加文件，C#拷贝文件，C#删除文件 ，C#移动文件 ，C#递归删除文件夹及文件

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>