C#文件操作大全.docx

1、C#文件操作大全1.创建文件夹/using System.IO;Directory.CreateDirectory(%1);2.创建文件/using System.IO;File.Create(%1);3.删除文件/using System.IO;File.Delete(%1);4.删除文件夹/using System.IO;Directory.Delete(%1);5.删除一个目录下所有的文件夹/using System.IO;foreach (string dirStr in Directory.GetDirectories(%1)DirectoryInfo dir = new Direc

2、toryInfo(dirStr);ArrayList folders=new ArrayList();FileSystemInfo fileArr = dir.GetFileSystemInfos();for (int i = 0; i 0)%2 /chunk,chunk.Lengthwhile(chunk.Length0);fs.Close();catch/return -1;8.写入文件/using System.IO;FileInfo f = new FileInfo(%1);StreamWriter w = f.CreateText();w.WriteLine(%2);w.Flush(

3、);w.Close();9.写入随机文件/using System.IO;byte dataArray = new byte100000;/new Random().NextBytes(dataArray);using(FileStream FileStream = new FileStream(%1, FileMode.Create)/ Write the data to the file, byte by byte.for(int i = 0; i dataArray.Length; i+)FileStream.WriteByte(dataArrayi);/ Set the stream

4、position to the beginning of the file.FileStream.Seek(0, SeekOrigin.Begin);/ Read and verify the data.for(int i = 0; i FileStream.Length; i+)if(dataArrayi != FileStream.ReadByte()/写入数据错误return;/数据流+FileStream.Name+已验证10.读取文件属性/using System.IO;FileInfo f = new FileInfo(%1);/f.CreationTime,f.FullNamei

5、f(f.Attributes & FileAttributes.ReadOnly) != 0)%2else%311.写入属性/using System.IO;FileInfo f = new FileInfo(%1);/设置只读f.Attributes = myFile.Attributes | FileAttributes.ReadOnly;/设置可写f.Attributes = myFile.Attributes & FileAttributes.ReadOnly;12.枚举一个文件夹中的所有文件夹/using System.IO;foreach (string %2 in Directo

6、ry.GetDirectories(%1)%3/*DirectoryInfo dir = new DirectoryInfo(%1);FileInfo files = dir.GetFiles(*.*);foreach(FileInfo %2 in files)%3*/13.复制文件夹/*using System.IO;using System.Collections;*/string path = (%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 : %2+Path.DirectorySeparatorCha

7、r;string parent = Path.GetDirectoryName(%1);Directory.CreateDirectory(path + Path.GetFileName(%1);DirectoryInfo dir = new DirectoryInfo(%1.LastIndexOf(Path.DirectorySeparatorChar) = %1.Length - 1) ? %1 : %1 + Path.DirectorySeparatorChar);FileSystemInfo fileArr = dir.GetFileSystemInfos();Queue Folder

8、s = new Queue(dir.GetFileSystemInfos();while (Folders.Count0)FileSystemInfo tmp = Folders.Dequeue();FileInfo f = tmp as FileInfo;if (f = null)DirectoryInfo d = tmp as DirectoryInfo;Directory.CreateDirectory(d.FullName.Replace(parent.LastIndexOf(Path.DirectorySeparatorChar) = parent.Length - 1) ? par

9、ent : parent + Path.DirectorySeparatorChar, path);foreach (FileSystemInfo fi in d.GetFileSystemInfos()Folders.Enqueue(fi);elsef.CopyTo(f.FullName.Replace(parent, path);14.复制目录下所有的文件夹到另一个文件夹下/*using System.IO;using System.Collections;*/DirectoryInfo d = new DirectoryInfo(%1);foreach (DirectoryInfo di

10、rs in d.GetDirectories()Queue al = new Queue(dirs.GetFileSystemInfos();while (al.Count 0)FileSystemInfo temp = al.Dequeue();FileInfo file = temp as FileInfo;if (file = null)DirectoryInfo directory = temp as DirectoryInfo;Directory.CreateDirectory(path + directory.Name);foreach (FileSystemInfo fsi in

11、 directory.GetFileSystemInfos()al.Enqueue(fsi);elseFile.Copy(file.FullName, path + file.Name);15.移动文件夹/*using System.IO;using System.Collections;*/string filename = Path.GetFileName(%1);string path=(%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 : %2 + Path.DirectorySeparatorChar;

12、if (Path.GetPathRoot(%1) = Path.GetPathRoot(%2)Directory.Move(%1, path + filename);elsestring parent = Path.GetDirectoryName(%1);Directory.CreateDirectory(path + Path.GetFileName(%1);DirectoryInfo dir = new DirectoryInfo(%1.LastIndexOf(Path.DirectorySeparatorChar) = %1.Length - 1) ? %1 : %1 + Path.D

13、irectorySeparatorChar);FileSystemInfo fileArr = dir.GetFileSystemInfos();Queue Folders = new Queue(dir.GetFileSystemInfos();while (Folders.Count 0)FileSystemInfo tmp = Folders.Dequeue();FileInfo f = tmp as FileInfo;if (f = null)DirectoryInfo d = tmp as DirectoryInfo;DirectoryInfo dpath = new Directo

14、ryInfo(d.FullName.Replace(parent.LastIndexOf(Path.DirectorySeparatorChar) = parent.Length - 1) ? parent : parent + Path.DirectorySeparatorChar, path);dpath.Create();foreach (FileSystemInfo fi in d.GetFileSystemInfos()Folders.Enqueue(fi);elsef.MoveTo(f.FullName.Replace(parent, path);Directory.Delete(

15、%1, true);16.移动目录下所有的文件夹到另一个目录下/*using System.IO;using System.Collections;*/string filename = Path.GetFileName(%1);if (Path.GetPathRoot(%1) = Path.GetPathRoot(%2)foreach (string dir in Directory.GetDirectories(%1)Directory.Move(dir, Path.Combine(%2,filename);elseforeach (string dir2 in Directory.Get

16、Directories(%1)string parent = Path.GetDirectoryName(dir2);Directory.CreateDirectory(Path.Combine(%2, Path.GetFileName(dir2);string dir = (dir2.LastIndexOf(Path.DirectorySeparatorChar) = dir2.Length - 1) ? dir2 : dir2 + Path.DirectorySeparatorChar;DirectoryInfo dirdir = new DirectoryInfo(dir);FileSy

17、stemInfo fileArr = dirdir.GetFileSystemInfos();Queue Folders = new Queue(dirdir.GetFileSystemInfos();while (Folders.Count 0)FileSystemInfo tmp = Folders.Dequeue();FileInfo f = tmp as FileInfo;if (f = null)DirectoryInfo d = tmp as DirectoryInfo;DirectoryInfo dpath = new DirectoryInfo(d.FullName.Repla

18、ce(parent.LastIndexOf(Path.DirectorySeparatorChar) = parent.Length - 1) ? parent : parent + Path.DirectorySeparatorChar, %2);dpath.Create();foreach (FileSystemInfo fi in d.GetFileSystemInfos()Folders.Enqueue(fi);elsef.MoveTo(f.FullName.Replace(parent, %2);dirdir.Delete(true);17.以一个文件夹的框架在另一个目录创建文件夹和

19、空文件/*using System.IO;using System.Collections;*/bool b=false;string path = (%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 : %2 + Path.DirectorySeparatorChar;string parent = Path.GetDirectoryName(%1);Directory.CreateDirectory(path + Path.GetFileName(%1);DirectoryInfo dir = new Dir

20、ectoryInfo(%1.LastIndexOf(Path.DirectorySeparatorChar) = %1.Length - 1) ? %1 : %1 + Path.DirectorySeparatorChar);FileSystemInfo fileArr = dir.GetFileSystemInfos();Queue Folders = new Queue(dir.GetFileSystemInfos();while (Folders.Count 0)FileSystemInfo tmp = Folders.Dequeue();FileInfo f = tmp as File

21、Info;if (f = null)DirectoryInfo d = tmp as DirectoryInfo;Directory.CreateDirectory(d.FullName.Replace(parent.LastIndexOf(Path.DirectorySeparatorChar) = parent.Length - 1) ? parent : parent + Path.DirectorySeparatorChar, path);foreach (FileSystemInfo fi in d.GetFileSystemInfos()Folders.Enqueue(fi);el

22、seif(b) File.Create(f.FullName.Replace(parent, path);18.复制文件/using System.IO;File.Copy(%1,%2);19.复制一个文件夹下所有的文件到另一个目录/using System.IO;foreach (string fileStr in Directory.GetFiles(%1)File.Copy(%1.LastIndexOf(Path.DirectorySeparatorChar) = %1.Length - 1) ? %1 +Path.GetFileName(fileStr): %1 + Path.Dire

23、ctorySeparatorChar+Path.GetFileName(fileStr),(%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 +Path.GetFileName(fileStr): %2 + Path.DirectorySeparatorChar+Path.GetFileName(fileStr);20.提取扩展名/using System.IO;string %2=Path.GetExtension(%1);21.提取文件名/using System.IO;string %2=Path.GetF

24、ileName(%1);22.提取文件路径/using System.IO;string %2=Path.GetDirectoryName(%1);23.替换扩展名/using System.IO;File.ChangeExtension(%1,%2);24.追加路径/using System.IO;string %3=Path.Combine(%1,%2);25.移动文件/using System.IO;File.Move(%1,%2+Path.DirectorySeparatorChar+file.getname(%1);26.移动一个文件夹下所有文件到另一个目录/using System

25、.IO;foreach (string fileStr in Directory.GetFiles(%1)File.Move(%1.LastIndexOf(Path.DirectorySeparatorChar) = %1.Length - 1) ? %1 +Path.GetFileName(fileStr): %1 + Path.DirectorySeparatorChar+Path.GetFileName(fileStr),(%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 +Path.GetFileName

26、(fileStr): %2 + Path.DirectorySeparatorChar+Path.GetFileName(fileStr);27.指定目录下搜索文件/*using System.Text;using System.IO;*/string fileName = %1;DriveInfo drives = DriveInfo.GetDrives();string parent = Path.GetDirectoryName(%2);DirectoryInfo dir = new DirectoryInfo(%2.LastIndexOf(Path.DirectorySeparatorChar) = %2.Length - 1) ? %2 : %2 + Path.DirectorySeparatorChar);FileSystemInfo fileArr;tryfileArr = dir.GetFileSystemInfos();catch (Exception)continue;Queue Folders = new Queue(dir.GetF