C#常用文件操作

C#常用文件操作 2008-2-10

C#写入/读出文本文件

publicvoidPage_Load(Objectsrc,EventArgse)

{

StreamWriterrw=File.CreateText(Server.MapPath(".")+"//myText.txt");

rw.WriteLine("追逐理想");

rw.WriteLine("kzlll");

rw.WriteLine(".NET笔记");

rw.Flush();

rw.Close();

}

打开文本文件

StreamReadersr=File.OpenText(Server.MapPath(".")+"//myText.txt");

StringBuilderoutput=newStringBuilder();

stringrl;

while((rl=sr.ReadLine())!=null)

{

output.Append(rl+" ");

}

lblFile.Text=output.ToString();

sr.Close();

 

C#追加文件

StreamWritersw=File.AppendText(Server.MapPath(".")+"//myText.txt");

sw.WriteLine("追逐理想");

sw.WriteLine("kzlll");

sw.WriteLine(".NET笔记");

sw.Flush();

sw.Close();

C#拷贝文件

stringOrignFile,NewFile;

OrignFile=Server.MapPath(".")+"//myText.txt";

NewFile=Server.MapPath(".")+"//myTextCopy.txt";

File.Copy(OrignFile,NewFile,true);

C#删除文件

stringdelFile=Server.MapPath(".")+"//myTextCopy.txt";

File.Delete(delFile);

C#移动文件

stringOrignFile,NewFile;

OrignFile=Server.MapPath(".")+"//myText.txt";

NewFile=Server.MapPath(".")+"//myTextCopy.txt";

File.Move(OrignFile,NewFile);

 

C#创建目录

//创建目录c:/sixAge

DirectoryInfod=Directory.CreateDirectory("c://sixAge");

//d1指向c:/sixAge/sixAge1

DirectoryInfod1=d.CreateSubdirectory("sixAge1");

//d2指向c:/sixAge/sixAge1/sixAge1_1

DirectoryInfod2=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

publicvoidDeleteFolder(stringdir)

{

if(Directory.Exists(dir))//如果存在这个文件夹删除之

{

foreach(stringdinDirectory.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

}

protectedvoidPage_Load(Objectsender,EventArgse)

{

stringDir="D://gbook//11";

DeleteFolder(Dir);//调用函数删除文件夹

}