[Blazor] Dispose page before initializing the navigated page

[danielchalmers]

You have a page that implements IDisposable and you call NavigationManager.NavigateTo("/NewPage").

The OnInitialized() event on NewPage is called before Dispose() on the previous page.

Is it possible to reverse the order without forcing a reload?

[MariovanZeist]

Hi @danielchalmers
You could add the NavigationLock component to your page, and handle the OnBeforeInternalNavigation event.
(Or call the NavigationManager.RegisterLocationChangingHandler(OnLocationChanging) function to register a function that gets called before the navigation takes place. (be sure to dispose it though). [See here] (https://learn.microsoft.com/en-us/aspnet/core/blazor/fundamentals/routing?view=aspnetcore-8.0#handleprevent-location-changes)

[danielchalmers]

Thank you, that works but it doesn't trigger on refresh which complicates things a little.

[javiercn]

It's not possible, we can only dispose the previous page/component when it is no longer part of the document.