C#.net windows development

Question

0.00/5 (No votes)

See more:

I developed a win application using vs2008 in c# & sql server2005..
now i want to implement a license feature in my project,means i want to give a software to client for 1 year license after 1 year again insert the license for 1 or 2 years...
can anybody help me

if anybody having the code for this then please sare it with me asap
[email removed]

Posted 9-Aug-11 5:21am

vishaalmandge

Updated 9-Aug-11 5:23am

LittleYellowBird

v2

Add a Solution

Comments

LittleYellowBird 9-Aug-11 11:24am

Hi, there is no need to include your email as you will be notified via the email address that you registered with when there are any answers, and you will get lots of spam! So I have removed it for you. :)

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Wendelius · Answer 1 · 2011-08-09T05:30:00

Solution 1

Have you already checked this article: License Key Generation[^]. You could additionally use time stamps somewhere proper place (file dates, registry etc) for expiration check.

Posted 9-Aug-11 5:30am

Wendelius

Comments

BobJanova 9-Aug-11 12:18pm

Good link.

The OP should bear in mind that if he is shipping a .Net assembly, it is fairly trivial for someone to decompile it and reverse-engineer the license requirements. So don't rely on such a mechanism to prevent piracy. In addition, expiring licenses are a huge pain if the company that issues them disappears (unless they are trivial to reverse engineer in which case they are pointless.)

Wendelius 9-Aug-11 12:47pm

Good points, thanks for the addition!

Ravi Bhavnani 9-Aug-11 15:04pm

Actually, it's pretty easy to release an obfuscated assembly, reducing the risk of decompilation. Further, signing the license with a public/private key pair adequately prevents modification of the license (whose content can even be in plaintext).

/ravi

Not Active · Answer 2 · 2011-08-09T05:31:00

Solution 2

Bing[^]

Posted 9-Aug-11 5:31am

Not Active

v2