C#文件创建、移动、删除、复制
C#文件创建、移动、删除、复制
//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("文件夹：" + item + "
");
DirectoryInfo directoryinfo = new DirectoryInfo(item);
Response.Write("名称：" + https://www.360docs.net/doc/2919037540.html, + "
");
Response.Write("路径：" + directoryinfo.FullName + "
");
Response.Write("创建时间：" + directoryinfo.CreationTime + "
");
Response.Write("上次访问时间：" + https://www.360docs.net/doc/2919037540.html,stAccessTime + "
");
Response.Write("上次修改时间：" + https://www.360docs.net/doc/2919037540.html,stWriteTime + "
");
Response.Write("父文件夹：" + directoryinfo.Parent + "
");
Response.Write("所在根目录：" + directoryinfo.Root + "
");
Response.Write("
");
}
//所有子文件
foreach (string item in Directory.GetFiles(Server.MapPath("a")))
{
Response.Write("文件：" + item + "
");
FileInfo fileinfo = new FileInfo(item);
Response.Write("名称：" + https://www.360docs.net/doc/2919037540.html, + "
");
Response.Write("扩展名：" + fileinfo.Extension +"
");
Response.Write("路径：" + fileinfo.FullName +"
");
Response.Write("大小：" + fileinfo.Length +"
");
Response.Write("创建时间：" + fileinfo.CreationTime +"
");
Response.Write("上次访问时间：" + https://www.360docs.net/doc/2919037540.html,stAccessTime +"
");
Response.Write("上次修改时间：" + https://www.360docs.net/doc/2919037540.html,stWriteTime +"
");
Response.Write("所在文件夹：" + fileinfo.DirectoryName +"
");
Response.Write("文件属性：" + fileinfo.Attributes +"
");
Response.Write("
");
}
}
//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("https://www.360docs.net/doc/2919037540.html,/");
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(".")+"\\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
string OrignFile,NewFile;
OrignFile = Server.MapPath(".")+"\\myText.txt";
NewFile = Server.MapPath(".")+"\\myTextCopy.txt";
File.Copy(OrignFile,NewFile,true);
C#删除文件
string delFile = Server.MapPath(".")+"\\myTextCopy.txt";
File.Delete(delFile);
C#移动文件
string OrignFile,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
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"%>