//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(""); 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();}获取文件的版本信息:
FileVersionInfo myFileVersionInfo1 = FileVersionInfo.GetVersionInfo("D:\\TEST.DLL");textBox1.Text="版本号: " + myFileVersionInfo1.FileVersion;更改文件属性,删除只读文件:
下例欲将E:\test.txt文件拷贝至D:\tmp\test.txt,但D:\tmp\test.txt已经存在。
//File.Copy(sourceFile,destinationFile,true); 用来拷贝文件
//当destinationFile已经存在时,无法将文件file1拷贝到目标文件,//因此先删除destination文件,File.Delete()方法不能删除只读文件,//因此,如果文件属性为只读(Attributes属性中会包含有"ReadOnly"),//先把文件属性重置为Normal,然后再删除:string file1="E:\\test.txt";string destinationFile="d:\\tmp\\test.txt";if(File.Exists(destinationFile)){ FileInfo fi=new FileInfo(destinationFile); if(fi.Attributes.ToString().IndexOf("ReadOnly")!=-1) fi.Attributes=FileAttributes.Normal; File.Delete(destinationFile);}File.Copy(file1,destinationFile,true);判断文件是否存在:File.Exists(string filePath)
判断目录是否存在:Directory.Exists("D:\\LastestVersion")
按行读取文件:
int fileCount=0;
// Open the file just specified such that no one else can use it.StreamReader sr = new StreamReader(textBox1.Text.Trim());while(sr.Peek() > -1)//StreamReader.Peek()返回下一个可用字符,但不使用它{ listBox1.Items.Add(sr.ReadLine()); fileCount++;}sr.Close();按行写入文件:
StreamWriter sw = new StreamWriter("D:\\result.txt");for(int i=0;i<10;i++){ sw.WriteLine("这是第"+i.ToString()+"行数据");}C#追加文件
StreamWriter sw = File.AppendText(Server.MapPath(".")+""); 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(".")+""; NewFile = Server.MapPath(".")+""; File.Copy(OrignFile,NewFile,true);C#删除文件
string delFile = Server.MapPath(".")+""; File.Delete(delFile);C#移动文件
string OrignFile,NewFile; OrignFile = Server.MapPath(".")+""; NewFile = Server.MapPath(".")+""; 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 }