CODEWITHSUNDEEP
c#filewinapi
hackp0int
hackp0int

Reputation: 4169

Lock file from being changed by no one except me?

I need to lock my password dictionary file, i want to lock file from being deleted and changed.

How should i do it? In C# WinApi or any thing else?

Upvotes: 3

Views: 708

Answers (4)

Chibueze Opata
Chibueze Opata

Reputation: 10054

If you are looking for a WINAPI alternative, see this answer. It actually addresses problem that could encountered using FileStream.Lock.

Upvotes: 0

Rohit
Rohit

Reputation: 3638

You can open file with FileShare.None and keep it as long as you want it to be locked

var stream = new FileStream("file.ext",FileMode.Open,
          FileAccess.ReadWrite,FileShare.None);
//file is locked 


stream.Close(); //lock is release.

http://msdn.microsoft.com/en-us/library/5h0z48dh.aspx

Upvotes: 2

Ria
Ria

Reputation: 10367

While your program is running you can use FileStream.Lock and FileStream.UnLock for locking the file.

Upvotes: 2

Hassan Boutougha
Hassan Boutougha

Reputation: 3929

why don't you set security on your file (allowing only users you want) and in your code use impersonation. Impersonation will allow your application to use user credentials to access your file

use Impersonator class from url http://www.codeproject.com/Articles/10090/A-small-C-Class-for-impersonating-a-User

using (new Impersonator("Username", "Domainname", "Password")) 
{ 
  string pwdfile= File.ReadAllText("c:\dictionaryfile.pwd"); 
  Console.WriteLine(pwdfile); 
}

Upvotes: 1

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