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