Creating a Trial App with usage limit

[hamishwillee]

Nice question indeed - and winner of the current promotion. Well done.

I was wondering if anyone in the thread would like to create a wiki article covering in more detail the ideas and concepts here? I think "How do I create a trial app in Windows phone" which explores the difficulty of getting unique identifiers, server vs local storage, limiting on functionality rather than uses, in app purchase/advertising could make a very good story.

As a side note, I wonder if the in-app purchase could somehow be used here - ie is it possible to create a consumable (20 free goes) that can only be purchased once by a particular user?

[binu_ji]

Thanks Hamish for the device.

Surly need a wiki article for creating a trial app with usage/time limited applications. Since there is no help in web for this condition.

Binu

[Daniel Jones]

Congrats binu for your Lumia..

[Shayan Rais]

Hi binu_ji ;
Nice Question and congrats for your Lumia

Please can you share the code that how are you counting that the app is working for 20times.

Thanks

[Loukt]

Hi binu_ji ;
Nice Question and congrats for your Lumia

Please can you share the code that how are you counting that the app is working for 20times.

Thanks

You can do so easly by storing that in the IsolatedStorageSettings
and putting it in the app launch event.

var settings = IsolatedStorageSettings.ApplicationSettings;
bool reachedMax = false;
if(settings.contains("AppUseCount"))
{
    var i = (int) settings["AppUseCount"];
    reachedMax = (i>=20);
    settings["AppUseCount"] = i+1;
}
else 
{
    settings["AppUseCount"] =1;
}
settings.Save()
if(reachedMax) MessageBox.Show("You reached the trial limit.")

but by uninstalling and installing the app again, the counter is back to 0 and the user can try it again.

[binu_ji]

Hi binu_ji ;
Nice Question and congrats for your Lumia

Please can you share the code that how are you counting that the app is working for 20times.

Thanks

I used RadTrialApplicationReminder control from telerik, which take care of app usage counts.

[hamishwillee]

Hi Binu

Thanks Hamish for the device.

Surly need a wiki article for creating a trial app with usage/time limited applications. Since there is no help in web for this condition.

Binu

You're welcome. If you feel you could create such an article, I'd be happy to help tidy it up. Does anyone else volunteer?

[binu_ji]

The problem is i am an VB developer, and my code is also in VB. Is that ok?

[wizard_hu_]

The problem is i am an VB developer, and my code is also in VB. Is that ok?

That is absolutely no problem, and yes, using VB code in a Wiki article is perfectly ok.

[joaocardoso]

The problem is i am an VB developer, and my code is also in VB. Is that ok?

I'm also an VB developer so I welcome VB articles