C # Delete files, clean delete files

C # Removes the files used by the program, cleans the deleted files, deletes the files completely, and unlocks the files

Open in shared read-write mode when the file is opened

FileStream InputStream = new FileStream (name, FileMode.Open, FileAccess.Read, fileshare.readwrite);  P.backgroundimage = new Bitmap (InputStream);   Inputstream.dispose ();                  Delete file public void Wipefile (string filename, int timestowrite) {try { The IF (file.exists (filename)) {//Settings file property is normal, which is to prevent the file from being read-only File.set                      Attributes (filename, fileattributes.normal); Calculates the number of sectors double sectors = math.ceiling (new FileInfo (filename).                      length/512.0);                      Create a virtual cache of the same size byte[] Dummybuffer = new byte[512];                      Create an encrypted random number generator RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider (); Open this file for FileStream FileStream InputStream = new FileStream (filename, FileMode.Open, Fileaccess.wri                      TE, Fileshare.readwrite); for (int curRentpass = 0; Currentpass < Timestowrite;                           currentpass++) {//file stream location inputstream.position = 0; Loop all sectors for (int sectorswritten = 0; Sectorswritten < sectors; sec torswritten++) {//fill the garbage data into the RNG in the stream.                              GetBytes (Dummybuffer);                          Writes to the file stream Inputstream.write (dummybuffer, 0, dummybuffer.length);                      }}//Empty file Inputstream.setlength (0);                      Close file stream Inputstream.close ();                      Clearing the original date requires a datetime dt = new DateTime (2037, 1, 1, 0, 0, 0);                      File.setcreationtime (filename, DT);                      File.setlastaccesstime (filename, DT); File.setlaStwritetime (filename, DT);                  Delete file file.delete (filename);  }} catch (Exception) {}}

　　

Reprinted from Http://blog.csdn.net/pigkeli/article/details/28877279?utm_source=tuicool

C # Delete files, clean delete files