ant-design-blazor/components/statistic/CountDown.razor.cs
2020-09-20 11:45:58 +08:00

48 lines
1.2 KiB
C#

using System;
using System.Text.RegularExpressions;
using System.Threading;
using Microsoft.AspNetCore.Components;
namespace AntDesign
{
public partial class CountDown : StatisticComponentBase<DateTime>
{
[Parameter]
public string Format { get; set; } = "hh:mm:ss";
[Parameter]
public EventCallback OnFinish { get; set; }
private Timer _timer;
private const int REFRESH_INTERVAL = 1000 / 30;
private TimeSpan _countDown = TimeSpan.Zero;
protected override void OnInitialized()
{
base.OnInitialized();
_countDown = Value - DateTime.Now;
_timer = new Timer(StartCountDownForTimeSpan);
_timer.Change(0, REFRESH_INTERVAL);
}
private void StartCountDownForTimeSpan(object o)
{
_countDown = _countDown.Add(TimeSpan.FromMilliseconds(-REFRESH_INTERVAL));
if (_countDown.Ticks <= 0)
{
_countDown = TimeSpan.Zero;
_timer.Dispose();
if (OnFinish.HasDelegate)
{
OnFinish.InvokeAsync(o);
}
}
InvokeStateHasChanged();
}
}
}