Ensuring Database Updates on Form Closure: Troubleshooting for Mac.

Question

When I attempt to insert details into the database upon closing the form or upon its disappearance event, the code doesn't execute as expected. However, the same code executes properly when triggered by a button click or when the form appears. I need assistance in ensuring that my application adds details to the database even when it is closed, particularly for Mac

Answer 1

Hello,

When you close the app, the lifecycle events of Window will be triggered. And you could update your local database in the Stopped method. (Or you can do the operation in the Backgrounding method)

For example:

// in the App class
protected override Window CreateWindow(IActivationState? activationState)
    {
		Window window = base.CreateWindow(activationState);
        window.Backgrounding += Window_Backgrounding;
        window.Stopped += Window_Stopped;
		return window;
    }
 
    private void Window_Stopped(object? sender, EventArgs e)
    {
        Console.WriteLine("Window_Stopped");
    }
    private void Window_Backgrounding(object? sender, BackgroundingEventArgs e)
    {
        Console.WriteLine("Window_Backgrounding");
    }

For more details, please see App lifecycle - .NET MAUI | Microsoft Learn

Best Regards,

Wenyan Zhang

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.