How, set Expiry date for my application

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1.22/5 (2 votes)

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C#

Hi,

I need to set Expiry date for my app.
Kindly help me to do so.

Thanx in advance

Posted 30-May-11 23:14pm

krishnaspmoorthy

Updated 19-Mar-18 1:21am

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yesotaso · Answer 1 · 2011-05-30T23:28:00

Solution 1

Checkout: Application Trial Maker[^]

Posted 30-May-11 23:28pm

yesotaso

OriginalGriff · Answer 2 · 2011-05-30T23:29:00

Solution 2

In your Main function (See Program.cs) read the expiry date you saved somewhere, and check it against DateTime.Now

What is the problem you are having with that?

Posted 30-May-11 23:29pm

OriginalGriff

Comments

krishnaspmoorthy 31-May-11 5:40am

But the user can change the system date... den no use of checking DateTime.Now

Member 10918596 19-Mar-18 7:20am

As per your requirement, what I see, you cannot check the online server for date. This is quite obvious for offline system.

So, you need to do few things -

set the registration date and expirydate in the form of high encypted data and save it somewhere in registry database.

While the Application opens each time, get the latest clock date and save the encrypted data in registry.

Ensure to check the Clock date and the Last Usage Date. If last usagedate < clockdate, then everything fine but if usagedate>clockdate, user has changed the clock date. So, don't update the registry.

Once the lastusagedate reaches the expiry date, pops a message "Your Trial has been expired.".

thatraja · Answer 3 · 2011-05-31T08:52:00

Look at these

Implementing trial app in C#[^]
Articles
License Key Generation[^]
Implementation of the Licensing System for a Software Product[^]
Using XML Digital Signatures for Application Licensing[^]
Discussions
Create an application that will expire after a trial period.[^]
How to create trial version of .NET software?[^]