How to set an Expiry Date for web application using ASP.Net

Question

Hi Friends Am developing web based Application using ASP.NET C# i need to set Expiry Date for Application after Particular date for example if Application is Hosted in Server on 01/Jan/2015 it Should Expire in Particular Date What we are setting in Application is their any Solution Please Share ASAP. Note : It Should not work Based on System Date Regards. R.V.Rajagopalan

Rajagopalan R V · Answer

Hi Francis Requirement is like that if we change date also in server it should not affect the license details and Both Application and DB Server also with client only and they work in only LAN Network so they don't Have Internet Connection to access UTC Time or IST to set License expiry Date in coding Regards R.V.Rajagopalan

Francis · Answer

it will show well if Server date is Changed to 14/12/2015 again Application will work to avoid this am looking for new idea I don't know why you are changing the date in Server(DB server whichh is on your end). am looking for without internet and system DateTime to get Today date with out internet means What type of application you are using then? Also as per my logic you never use Datetime.Now function. -

Rajagopalan R V · Answer

Hi Francis What you said is correct when i want to check current date and time i need to use DateTime.Now but if i use this it will get server Time based on this Process will go on For example Product is Licensed upto 15/12/2015 and today date is 16/12/2015 it should show license Expired  ok it will show well if Server date is Changed to 14/12/2015 again Application will work to avoid this am looking for new idea And i have tried Based on Indian Standard Time through Internet it made suceessfully  But am looking for without internet and system DateTime to get Today date Regards R.V.Rajagopalan

Francis · Answer

Firstly i want to know that Have you got my idea? Since you are developing internet (web) application it is hosted somewhere in client base. right? In that case if a user login to the system at that time it will interact with your DB server and check for that particular client the date is expire or not. If not it will allow to login otherwise not.

Rajagopalan R V · Answer

Hi Francis  it's not a common DB it's like a product DB Server also their with Client Side so only we need to do in Application because after Publishing of our code they can't find any expiry dates Regards R.V.Rajagopalan

Francis · Answer

I meant that you should store the Installation Date and Expiry Date on your DB SERVER. Not on client DB Server. The application always (say whenever the user login) interact with your DB Server and check for that particular client stored Expire Date is not greater than the CURRENT DATE OF YOUR DB SERVER. Regarding DATE it will always consider YOUR SERVER DATE (Which should be in a correct date always). Not on client's SERVER Date. Hope you got my point! If not let me know :)

Rajagopalan R V · Answer

Hi Francis Thanq for your Reply on this post  we are also using same concept like encryption and saving it in DB Table and Based on that we are setting Expiry Date but in this if we change Server Date Again Application is working but it should work like that based on server date Regards. R.V.Rajagopalan

Francis · Answer

Yes. You can do it. Just encrypt it and store your installation date and expiry date somewhere with in the application so whenever the user login check the expiry date and proceed further. In the above scenario you must relay on system or DB server date. As an alternative since you are using web application whenever the application installed on the server make an entry to your DB table (like client name installation date and expiry date). So whenever the application starts or user login it should interact with your DB and check for the expiration date. If anything fails (if it unable to contact your DB server or the application expired). This is the simple idea that i have expreienced previously. Hope this helps!