141107 WinForm operating files directory and files

File and folder operations:

First, the file class

1. Create:

FileStream fs = file.create (file path);

Remember, after the creation is complete, you need to turn off FS, otherwise people will not be able to use this file.

FileStream fs = File.create (@ "E:\aaa.txt");

Fs. Close ();

using (FileStream fs = File.create (@ "E:\aaa.txt"))

//{

StreamWriter SW = new StreamWriter (FS, Encoding.default);

Sw. WriteLine ("Hello World");

Sw. Close ();

//}

2. Delete

File.delete (@ "E:\aaa.txt");

3. Copying files

File.Copy (@ "E:\test.txt", @ "D:\new.txt");

4. Determine if the file exists

BOOL isexisted = file.exists (@ "E:\test.txt");

if (isexisted = = True)

{

MessageBox.Show ("File already exists");

}

Else

{

MessageBox.Show ("OK");

}

5. File movement

File.move (@ "E:\test.txt", @ "D:\aaa.txt");

6. Get creation Time

DateTime dt = File.getcreationtime (@ "D:\aaa.txt");

This. Text = dt. ToString ("Yyyy-mm-dd hh:mm:ss");

7. Get access Time

DateTime dt = File.getlastaccesstime (@ "D:\aaa.txt");

This. Text = dt. ToString ("Yyyy-mm-dd hh:mm:ss");

8. Get the last modified time

DateTime dt = File.getlastwritetime (@ "D:\aaa.txt");

This. Text = dt. ToString ("Yyyy-mm-dd hh:mm:ss");

9. Modify Creation Time

DateTime time = DateTime.Now.AddSeconds (10000);

File.setcreationtime (@ "D:\aaa.txt", time);

10. Modify the Access time

DateTime time = DateTime.Now.AddSeconds (-1000);

File.setlastaccesstime (@ "D:\aaa.txt", time);

11. Modify the last modified time

DateTime time = DateTime.Now.AddSeconds (-20000);

File.setlastwritetime (@ "D:\aaa.txt", time);

12. File name change

File.move (@ "D:\aaa.txt", @ "D:\test.txt");

13. Create a Directory

Directory.CreateDirectory (@ "D:\mydir");

14. Delete Directory

Directory.delete (@ "D:\mydir");

15. Whether the directory exists

MessageBox.Show (Directory.Exists (@ "D:\mydir"). ToString ());

16. Get subdirectories

string[] dirs = directory.getdirectories (@ "c:\windows");

foreach (string s in dirs)

{

Label1. Text + = "\ n" + s;

}

17. Get sub-Files

string[] files = directory.getfiles (@ "c:\windows");

foreach (string s in files)

{

Label1. Text + = "\ n" + s;

}

18. Get the root directory

This. Text = Directory.getdirectoryroot (@ "C:\WIndows");

19, access to the upper level

DirectoryInfo di = directory.getparent (@ "C:\windows\microsoft.net");

This. Text = di. Name;

Second, FileInfo class

1. Create a file

FileInfo file = new FileInfo (@ "E:\test.txt");

FileStream stream = file. Create ();

Stream. Close ();

2. Delete Files

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. Delete ();

3. Copying files

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. CopyTo (@ "D:\aaa.txt", true);

4. Moving files

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. MoveTo (@ "D:\test1.txt");

5. Whether the file exists

FileInfo info = new FileInfo (@ "E:\test.txt");

BOOL B = info. Exists;

MessageBox.Show (B.tostring ());

6. Get the file name

FileInfo info = new FileInfo (@ "E:\test.txt");

string s = info. FullName;

MessageBox.Show (s);

7. Get creation Time

FileInfo info = new FileInfo (@ "E:\test.txt");

DateTime dt = info. CreationTime;

MessageBox.Show (dt. ToString ());

8. Get access Time

FileInfo info = new FileInfo (@ "E:\test.txt");

DateTime dt = info. LastAccessTime;

DateTime dt = File.getlastaccesstime (@ "E:\test.txt");

MessageBox.Show (dt. ToString ());

9. Get modification Time

FileInfo info = new FileInfo (@ "E:\test.txt");

DateTime dt = info. LastWriteTime;

MessageBox.Show (dt. ToString ());

10. Set creation time

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. CreationTime = DateTime.Now.AddDays (1000);

11. Set the modification time

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. LastWriteTime = DateTime.Now.AddDays (1000);

12. Set Access time

FileInfo info = new FileInfo (@ "E:\test.txt");

Info. LastAccessTime = DateTime.Now.AddDays (1000);

13. Create a Directory

DirectoryInfo info = new DirectoryInfo (@ "E:\MyDir");

Info. Create ();

14. Delete Directory

DirectoryInfo info = new DirectoryInfo (@ "E:\MyDir");

Info. Delete ();

15. Mobile Directory

DirectoryInfo info = new DirectoryInfo (@ "E:\MyDir");

Info. MoveTo (@ "D:\YourDir");

16. Whether the directory exists

DirectoryInfo info = new DirectoryInfo (@ "E:\MyDir");

BOOL B = info. Exists;

This. Text = B.tostring ();

17. Get the target full name

DirectoryInfo info = new DirectoryInfo (@ "E:\MyDir");

This. Text = info. FullName;

This. Text = info. Name;

18. Get sub-Files

DirectoryInfo info = new DirectoryInfo (@ "C:\Windows");

fileinfo[] Files = info. GetFiles ();

fileinfo[] Files = info. GetFiles ("*.exe");

foreach (FileInfo data in files)

{

string s = "< file >" + data. FullName + "\ T" + data. Extension + "\ T" + data. Creationtime.tostring ();

LISTBOX1.ITEMS.ADD (s);

}

string[] files = Directory.GetFiles ();

19. Get subdirectories

DirectoryInfo info = new DirectoryInfo (@ "C:\Windows");

directoryinfo[] Dirs = info. GetDirectories ();

foreach (DirectoryInfo data in dirs)

{

string s = "< directory >" + data. FullName + "\ T" + data. Creationtime.tostring ();

LISTBOX1.ITEMS.ADD (s);

}

20. Get Driver Information

driveinfo[] drivers = driveinfo.getdrives ();

foreach (DriveInfo dr in drivers)

{

if (Dr. DriveType! = drivetype.cdrom)

{

LISTBOX1.ITEMS.ADD (Dr. Name + "\ t" + Dr. DriveType + "\ t" + Dr. Volumelabel + "\ t" + Dr. TotalSize + "\ t" + Dr. Totalfreespace + "\ t" + Dr. Driveformat);

}

Else

{

LISTBOX1.ITEMS.ADD (Dr. Name + "\ t" + Dr. DriveType);

}

}

141107 WinForm operating files directory and files