如何在Blazor应用程序中防止计时器泄漏?

我在stackoverflow中发布了一个问题的答案 C# counter to count up to a target number .答案如下:

您可以创建一个计时器服务,它可以在多种情况下为您服务:

创建服务类:

public class BlazorTimer
    {
        private Timer _timer;

        internal void SetTimer(double interval)
        {
            _timer = new Timer(interval);
            _timer.Elapsed += NotifyTimerElapsed;
            _timer.Enabled = true;
            _timer.Start();
        }

        private void NotifyTimerElapsed(object sender, ElapsedEventArgs e)
        {
            OnElapsed?.Invoke();
        }

        public event Action OnElapsed;
    }

将服务添加到程序中的DI容器中。主要方法,如瞬态:

builder.Services.AddTransient(config =>
        {
            var blazorTimer = new BlazorTimer();
            blazorTimer.SetTimer(1000);
            return blazorTimer;
        });

用法

@page "/"

@implements IDisposable
@inject BlazorTimer Timer

@count.ToString()


@code{
private int count = 0;

protected override void OnInitialized()
{
    Timer.OnElapsed += NotifyTimerElapsed;

    base.OnInitialized();
}

private void NotifyTimerElapsed()
{
    // Note: WebAssembly Apps are currently supporting a single thread, which 
    // is why you don't have to call
    // the StateHasChanged method from within the InvokeAsync method. But it 
    // is a good practice to do so in consideration of future changes, such as 
    // ability to run WebAssembly Apps in more than one thread.
    InvokeAsync(() => { count++; StateHasChanged(); });
}

public void Dispose()
{
    Timer.OnElapsed -= NotifyTimerElapsed;
}

}

然而,有人告诉我

BlazorTimer正在泄漏\u计时器。计时器可识别

取消订阅Blazor组件中实现的Dispose方法中的事件处理程序是否会导致 BlazorTimer泄漏\u计时器。实际上,我并不完全理解“BlazorTimer正在泄漏\u计时器。计时器是IDisposable的”,所以让我问一下,如何防止计时器泄漏,同时使用代码取消订阅Blazor组件中实现的Dispose方法中的事件处理程序?除了跳过事件处理程序的取消订阅之外,是否有其他方法可以防止此泄漏。