System Date creating probliem in windows form

Question

0.00/5 (No votes)

See more:

i am making a Gym management system in windows form ( .Net ) . when application is start i check a date ( when user is registered ) with current System date . if current date is 1 month greater than Register date then user will be able to pay fee .. but my problem is this if user change a system date than my logic is failed what i do please suggest me ??

Posted 29-Aug-12 7:22am

Arsalaan Ahmed

Add a Solution

3 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)

Matt T Heffron · Answer 1 · 2012-08-29T09:00:00

I think Christian's solution is close, but his solution doesn't detect if the user resets the date to some time between the registration date and the expiration date. (Assuming I completely understand his.)

So, I'd save another date/time ("last used") every once-in-awhile and complain if the current system time is ever more than a reasonable amount (a couple of hours?) before the "last used" time.
Be sure to do the checking of the date/time as UTC to avoid any Daylight Savings Time type issues.
And, of course, don't make it easy for the user to change these saved values.

The risk here is that users may have a legitimate reason to reset the system time back by the larger amount. (But I can't think of any!)

Vinod Viswanath · Answer 2 · 2012-08-29T18:21:00

Hello,

You can have a registry key which will increment after every day's. SO even if user changes computer's date, this key help you to identify the days. And also you can have some encryption algorithms which will avoid user to manually edit the registry key.
Hope this will help you.

Thanks!!!!!!

Christian Amado · Answer 3 · 2012-08-29T07:40:00

Solution 1

When you install your software you must save the dates (the date for registered software & date expiration).

So you can ask if date is superior to date expiration "pay fee" if actual_date < date of registered software "pay fee"

This is only and idea.

Regards.

Posted 29-Aug-12 7:40am

Christian Amado

Comments

Christian Amado 29-Aug-12 14:09pm

Oh, thanks for downvoted.

System Date creating probliem in windows form

3 solutions

Solution 2

Solution 3

Solution 1

Add your solution here

Preview 0