彻底删除文件代码,CSharp代码库,德仔网

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【CSharp】彻底删除文件

作者:netCode / 发布于2015/8/21/ 587


	public class AbsoluteFile
	 {
	 public event EventHandler FinishDeleteFileEvent = null;

	 public event EventHandler FinishDeleteFolderEvent = null;

	 public event EventHandler DeleteErrorEvent = null;

	 public string ErrorString = string.Empty;

	 public void DoAbsoluteDeleteFile(object filePath)
	 {
	 try
	 {
	 string filename = filePath.ToString();

	 if (string.IsNullOrEmpty(filename))
	 {
	 return;
	 }

	 if (File.Exists(filename))
	 {
	 File.SetAttributes(filename, FileAttributes.Normal);
	
	 double sectors = Math.Ceiling(new FileInfo(filename).Length / 512.0);
	
	 byte[] dummyBuffer = new byte[512];
	
	 RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
	
	 FileStream inputStream = new FileStream(filename, FileMode.Open);

	 inputStream.Position = 0;
	
	 for (int sectorsWritten = 0; sectorsWritten < sectors; sectorsWritten++)
	 {
	 rng.GetBytes(dummyBuffer);

	 inputStream.Write(dummyBuffer, 0, dummyBuffer.Length);

	 sectorsWritten++;
	 }

	 inputStream.SetLength(0);

	 inputStream.Close();
	
	 DateTime dt = new DateTime(2049, 1, 1, 0, 0, 0);

	 File.SetCreationTime(filename, dt);

	 File.SetLastAccessTime(filename, dt);

	 File.SetLastWriteTime(filename, dt);

	 File.Delete(filename);

	 WipeDone();
	 }
	 }
	 catch (Exception e)
	 {
	 WipeError(e);
	 }
	 }

	 public void DoDeleteFolder(object folder)
	 {
	 string folderPath = folder.ToString();

	 if (string.IsNullOrEmpty(folderPath))
	 {
	 return;
	 }

	 DirectoryInfo direct = new DirectoryInfo(folderPath);

	 FileSystemInfo[] filesystem = direct.GetFileSystemInfos();

	 if (filesystem == null || filesystem.Length == 0)
	 {
	 direct.Delete();
	 }
	 else
	 {
	 foreach (FileSystemInfo fileItem in filesystem)
	 {
	 if (fileItem is FileInfo)
	 {
	 this.DoAbsoluteDeleteFile(fileItem.FullName);
	 }
	 else
	 {
	 DoDeleteFolder(fileItem.FullName);
	 }
	 }
	 }

	 if (this.FinishDeleteFolderEvent != null)
	 {
	 this.FinishDeleteFolderEvent(this, null);
	 }
	 }

	 private void WipeError(Exception e)
	 {
	 if (DeleteErrorEvent != null)
	 {
	 ErrorString = e.Message;

	 DeleteErrorEvent(this, null);
	 }
	 }

	 private void WipeDone()
	 {
	 if (FinishDeleteFileEvent != null)
	 {
	 FinishDeleteFileEvent(this, null);
	 }
	 }
	 }

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