DEV Community: S-Shanmathi

How can I save the time , when the browser closed by the user in mvc identity

S-Shanmathi — Mon, 31 Oct 2022 16:39:07 +0000

ASP.NET MVC IDENTITY:

I have tried to unload the event on the Layout page but it is not triggered, Alternatively, I have also used session time out in 'inproc', to save the logout time WHEN THE USER DOESN'T LOGOFF AND CLOSES THE BROWSER/TAB.

In Global.asax I have used session_end() event to end the session in one minute and logoff automatically after 1 minute in my MVC IDENTITY.

The requirement is that I need to store the time of browser/tab close by the user as LogOFF time in the database.

Is there any event to do the same?

How can I downgrade Flutter version 2.8.1 to 1.22.6? Is it possible?

S-Shanmathi — Wed, 23 Feb 2022 05:57:04 +0000

I'm currently working with the flutter updated version (2.8.1), but I need to downgrade to a lower version. When I tried, it showed a stable version not available. Could anyone suggest me any ideas?

Flutter: Providing non-objects.

S-Shanmathi — Sat, 19 Feb 2022 07:59:30 +0000

**> Providing non-Objects
Typically, when working with the Provider package, you provide objects based on your custom classes.

This makes sense because you can implement the ChangeNotifier mixin in your classes to then trigger *notifyListeners() * whenever you want to update all places in your app that listen to your data.

But you're not limited to providing objects - you can provide ANY kind of value (lists, numbers, strings, objects without *ChangeNotifier * mixing, ...).

Example:

Provider(builder: (ctx) => 'Hi, I am a text!', child: ...);

Of course, if you're using Provider Package v4 or greater, it would be create: ... instead of builder: ...

You might wonder, how this text can change though - it's a constant text after all. It certainly doesn't implement the ChangeNotifier **mixin (the **String class, which is built into Dart, indeed doesn't - just like numbers, booleans, etc.).

It's important to note, that the above snippet uses Provider, NOT ChangeNotifierProvider. The latter indeed only works with objects based on classes that use the ChangeNotifier mixin. And this is the most common use case because you typically want to be your global data changeable (and have the app UI react to that).

But in case you just want to provide some global (constant) value which you can then conveniently use like this:

print(Provider.of(context)); // prints 'Hi, I am a text!'; does never update!
you can do that.