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Posted 19 Oct 2005

Find and delete NTFS Alternate Data Streams (ADS )

, 19 Oct 2005
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A GUI extension of the NTFS library written by Richard Deeming.


Do you know what are NTFS Alternate Data Streams? If not, look at Accessing alternative data-streams of files on an NTFS volume, a Richard Deeming article. There you can download the sources and binaries of the NTFS.dll used in my project.

This project is a Windows GUI extension that allows you to Find and Remove all the interested data streams stored on your local drive or a network folder.

The data is returned in a DataGrid and you can sort it by stream name, size, location and file name.

Using the Form

The core of the form uses a recursive search, and each file found is stored into an ArrayList, and so is all the streams information of the file.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using NTFS;
using System.Threading;
private void DirSearch(string sDir, bool subFolders)
    foreach (string f in Directory.GetFiles(sDir))
     FileInfo FSInfo = new FileInfo(f);
     NTFS.FileStreams FS = new NTFS.FileStreams(f);
     foreach(NTFS.StreamInfo s in FS)
      FileInfoStruct fis;
      fis.File_Name = FS.FileName;
      fis.Stream_Name = s.Name;
      fis.Stream_Size = s.Size;
      fis.Location = FSInfo.DirectoryName;
      fis.Creation_Date = FSInfo.CreationTime;
    // update the results label
    String caption = "Results:  (" + 
                     this.fileInfoData1.FileInfo.Rows.Count.ToString() + 
    this.dataGridResult.CaptionText = caption;
    if (subFolders)
     foreach (string d in Directory.GetDirectories(sDir))
      DirSearch(d, subFolders);


This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)


About the Author

Marco Roello
Web Developer
Italy Italy
No Biography provided

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