CODEWITHSUNDEEP
asp.net-coreblazormiddleware
Carorus
Carorus

Reputation: 537

Blazor middleware to run after navigating to any page

I have written a middleware class but currently only runs when I start the application, I want it to run every time the app navigates to a different page.

Thanks!

Upvotes: 1

Views: 1641

Answers (1)

Cory Podojil
Cory Podojil

Reputation: 854

You have to use the NavigationManager.LocationChanged event for this type of middleware as Blazor utilizes websockets to render the UI, not traditional HTTP requests which is what you were expecting. Example of MainLayout.razor or any component that will only rendered once:

@implements IDisposable
@inject NavigationManager NavMgr

<h1>My Component</h1>

@code
{
    public OnInitialized()
    {
        // Bind the LocationChanged event
        NavMgr.LocationChanged += OnLocationChanged;
    }
    private void OnLocationChanged(object sender, LocationChangedEventArgs args)
    {
       // My code to execute when navigation has changed
    }
    public void Dispose()
    {
        // Always unbind the event on component disposal
        NavMgr.LocationChanged -= OnLocationChanged;   
    }
}

Upvotes: 2

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