creating trial or demo version application

shanwaj · January 19th, 2009, 08:27 AM

Hi to all,
I developed online accounting package.I want to give a trial or demo for my application
which is work for limited days (like 7 to 10 days).After trail version , it wont be work for them ,if the customer wants to buy my product ,they can contact me through given options.I searched many sites,I did not get any solution for my problem.Please any one can help me that how can i create a trail version or demo version it or provide me links .

Thanks in advance

dparsons · January 27th, 2009, 11:58 PM

Why not when you issue them a Demo Username and Password put an 'Expired' column on the row in the database? So if i sign up today, when my account is created, it will be set to expire n days from now. Your login code sproc might look something like:

sql Code:

SELECT Count(username) FROM Users WHERE (Username = @Username AND Password = @Password) AND Expired <= GetDate()

If the count returns 1 the user is still allowed to access the system otherwise they arent. Simple enough no?

hth.
-Doug

shanwaj · January 28th, 2009, 02:54 AM

Thank you Mr.Dparsons
Your suggestion helped me to creating demo version for limited time period.My team is like one man army team .I want to create a online trial application for clients which is expired on registry date of mechine.could you please provide me your valuble help for me.
Thanks in advance.
shanwaj

dparsons · January 28th, 2009, 10:21 AM

I am not sure what you are asking. Are you asking how to access the Registry on a clients machine from a website??

shanwaj · January 29th, 2009, 01:59 AM

Hi dparsons,
Yes it is similar to it.Some sites has given solution to creating trial application .Here I am giving the thread links below
http://www.eggheadcafe.com/community...e-for-you.aspx

http://www.aspcode.net/Creating-a-de...plication.aspx

http://www.codeverge.net/ng.asp-net-...et-application

in above threads i am getting little bit of confusion. I did not satisfy with codecoverge solution. In eggheadcafe site , it is showing a registration dialog window, how can I do it.You are providing your valuble time for helping me,could you please explain me briefly eggheadcafe example.

Thanks in advance

dparsons · January 29th, 2009, 01:39 PM

The EggHead article is a Windows Form application NOT an ASP.NET application so achieving that exact functionality in ASP.NET is not really possible. Further you have no direct way to access the registry on your clients machine without the use of an ActiveX control and, furthermore, that would only apply to people who are running windows. *nix environments do not use a registry. This is a silly idea anyway since the application in question would reside on a Web server and not the Client machine.

Out of the articles you posted I like the second one the best where he uses Pre-processor directives to determine what functionality should be prevelant for a given instance of the application.

hth.
-Doug

shanwaj · January 30th, 2009, 05:42 AM

Hi dparsons,
thanks for your reply,i am going to follow the second article.once again thank you very much .

shanwaj