倒计时计时器

@page "/"

<h1>Timer</h1>

<p>@counter</p>

<button @onclick="StartTimer">Start</button>

@code {

    private static System.Timers.Timer aTimer;

    private int counter = 60;

    public void StartTimer()

    {

        aTimer = new System.Timers.Timer(1000);

        aTimer.Elapsed += CountDownTimer;

        aTimer.Enabled = true;

    }

    public void CountDownTimer(Object source, System.Timers.ElapsedEventArgs e)

    {

        if (counter > 0)

        {

            counter -= 1;

        }

        else

        {

            aTimer.Enabled = false;

            // 倒计时结束后需要触发的功能，写在这里

        }

      InvokeAsync(StateHasChanged);// 强制刷新

    }

}