File and folder operations

File and folder operations:

C/s:winform can manipulate client files
B/s:brower Server

Namespaces: Using System. IO;

1. File class:

Create: File.create (path); Create file, return FileStream

FileStream fs = file.create (path), after which it needs to be closed or not open, fs.close ();

Delete: File.delete (path); no return value

Copy files: file.copy (source file, target file);

Cut files: File.move (source file path, target path);

Determine if the file exists: file.exists (path); return Boolean, true means existing

File encryption: File.encrypt (); File.decrypt (); decrypt

File.getcreationtime (path); Get creation time, return datetime type Setcreationtime (path, datetime type); Modify creation time

File.getlastaccesstime (path); Last access time, return datetime type Setlastaccesstime (path, datetime type); Modify access time

File.getlastwritetime (path); Last modified time, return datetime type Setlastwritetime (path, datetime type); Modify modification Time

2. Directory classes, directories (folders)

Directory. CreateDirectory (path); Create directory

Directory. Delete (path); Remove directory

Directory. Exists (path), whether the directory exists

Three-time get and set

Directory. GetDirectories (path); Gets a subdirectory that returns a string array

Directory. GetFiles (path); Get Child Files! Name! , returns a string array, string[] s = Directory. GetFiles (path);

Directory. Getdirectoryroot (path); Get root directory

Directory. GetParent (path); Get Top level Directory

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FileInfo class

Is the instance method, need to create object new to use, above is the static method of file

Create file: FileInfo f = new FileInfo (path); FileStream s = f.create (); S.close ();

Delete file: FileInfo f = new FileInfo (path); F.delete ();

Copy file: FileInfo f = new FileInfo (path), F.copyto (target path, whether overwrite (true is overwrite));

Move file: FileInfo f = new FileInfo (path); F.moveto (target path);

File exists: FileInfo f = new FileInfo (path); bool B = f.exists; Boolean, is a property

Get file name: FileInfo f = new FileInfo (path); string s = F.fullname; property, file name with path

Get creation time: DateTime d = f.creationtime, three time is the same, all attributes

Set creation time: F. CreationTime = DateTime.Now.AddDays (100); All three of them are the same.

Get file size: F. Length

DirectoryInfo class

Create directory: DirectoryInfo d = new DirectoryInfo (path); D.create ();

Delete directory: D. Delete ();

Move directory: D. MoveTo (target path);

Whether the directory exists: bool B = d.exists;

Get directory full name: D. FullName;

Get the Sub file! Object Information! : fileinfo[] f = d.getfiles (); Returns an array of file objects, the contents of which are more detailed, D.getfiles ("*.exe") only get EXE files

Get subdirectory: directoryinfo[] dr = D.getdirectories ();

File and folder operations