WinForm file Operations

File and folder operations

C/s:winform can manipulate client files
b/S: Browser service brower Server

Namespaces:using System. IO;

1. File class: Files

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

To copy a file: file.copy (source file, target file);

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

determine if the file exists: file.exists (path); Returns a Boolean that indicates that an existing

file encryption: File.encrypt (); The file name becomes green or the current user can open the copy to another user that cannot be opened

file decryption: File.decrypt ();

file.getcreationtime (path); Gets the creation time , returning the datetime type setcreationtime(Path, datetime type); Modify creation Time　　

file.getlastaccesstime (path); Last access Time , returns the 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 a directory　　

Directory. Delete (path); Delete directory　　

Directory. Exists (path); whether the directory exists　　

Three-time get and set same file class

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

3. FileInfo class

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

To create a file: FileInfo f = new FileInfo (path); FileStream s = f.create (); s.close ();

To delete a file: FileInfo f = new FileInfo (path); f.delete ();

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

To move a file: FileInfo f = new FileInfo (path); F.moveto (target path);

whether the 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; All three times are the same, all are attributes

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

get file Size: F.length

4. DirectoryInfo class

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

To Delete a directory: D.delete ();

To move a 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 , in more detail,d.getfiles ("*.exe") only gets EXE files

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

Example: (with recursion)

1. Get all the files under the folder and output

        //get all the files under the folder and output        Private voidGetallfiles (stringpath) {            //Create folder Information ObjectDirectoryInfo DF =NewDirectoryInfo (path); //get all files under this folderfileinfo[] Fsz =DF.            GetFiles (); //Output File Information            foreach(FileInfo datainchFsz) {richTextBox1.Text+ = data. FullName +"|***|"; }            //get all subfolders under this folderdirectoryinfo[] Dsz =DF.            GetDirectories (); //Traverse            foreach(DirectoryInfo DatadinchDSZ) {getallfiles (Datad).             FullName); }        }

2. To a folder, get the number of all files in the folder

        Private voidButton1_Click (Objectsender, EventArgs e) {Label1. Text= FileCount (@"E:\test").        ToString (); }        Private intFcount =0; Private intFileCount (stringpath) {            //Create folder Information ObjectDirectoryInfo DWJJ =NewDirectoryInfo (path); //the number of files under the current folderFcount + =DWJJ. GetFiles ().            Length; //take all folders in the current directory            foreach(DirectoryInfo DinchDWJJ.            GetDirectories ()) {filecount (d.fullname); }            returnFcount; }

3. To a folder, get the number of folders under the file

        Private intDCount =0; Private intDircount (stringpath) {            //Create a folder information ObjectDirectoryInfo d =NewDirectoryInfo (path); //take all folders under this directorydirectoryinfo[] df =d.getdirectories (); //cumulative number of foldersDCount + =DF.            Length; //Traverse all Folders            foreach(DirectoryInfo WinchDF)            {Dircount (w.fullname); }            returnDCount; }        Private voidButton2_Click (Objectsender, EventArgs e) {Label2. Text= Dircount (@"E:\test").        ToString (); }

4. To a folder, get the folder size

        Private voidButton3_Click (Objectsender, EventArgs e) {Label3. Text= Dirsize (@"E:\test").        ToString (); }        Private LongSize =0; Private LongDirsize (stringpath) {            //Create a directory information ObjectDirectoryInfo d =NewDirectoryInfo (path); //take all files in the current directory            foreach(FileInfo datainchD.getfiles ()) {Size+=data.            Length; }            //take all folders in the current directory            foreach(DirectoryInfo datainchd.getdirectories ()) {dirsize (data.            FullName); }            returnsize; }

5. To a folder, delete the folder

        Private voidButton4_Click (Objectsender, EventArgs e) {Deletedir (@"E:\test"); }        Private voidDeletedir (stringpath) {            //Creating directory information ObjectsDirectoryInfo d =NewDirectoryInfo (path); //take all the files in that directory, delete            foreach(FileInfo datainchD.getfiles ()) {data.            Delete (); }            //Delete Subfolders            foreach(DirectoryInfo datainchd.getdirectories ()) {Deletedir (data.            FullName); }            //Delete an empty folderD.delete (); }

WinForm file Operations