Should we use CancellationToken with MVC/Web API controllers?

Question

There are different examples for async controllers. Some of them use CancellationToken in method definition:

public async Task ShowItem(i         


        

Answer 1

You could use this

public async Task MyReallySlowReport(CancellationToken cancellationToken)
{
    CancellationToken disconnectedToken = Response.ClientDisconnectedToken;
    using (var source = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, disconnectedToken))
    {
        IEnumerable items;
        using (ApplicationDbContext context = new ApplicationDbContext())
        {
            items = await context.ReportItems.ToArrayAsync(source.Token);
        }
        return View(items);
    }
}

taken from here.