带标签倒计时的C＃计时器。 [英] C# Timer with a label countdown.

问题描述

嘿，

所以我一直在研究我的项目几个小时，并考虑一个计时器。所以它应该像这样工作，在一个应用程序应该是一个标签，标签为5:00分钟，这是一个倒计时零，我应该使用什么代码？顺便说一句，我使用VB.NET 2017

So i've been working on my project for few hours, and thinking about a timer. So it should work like that, in an app should be a label with an 5:00 Minute label, which is counting down to zero, what code should i have to use? Btw i use VB.NET 2017

推荐答案

嗨GeyBen420，

Hi GeyBen420,

请参考：

Please refer to this:

Public Class Form3
    Private startTime As DateTime
    Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Label1.Text = TimeSpan.FromMinutes(5).ToString("mm\:ss")
        Timer1.Interval = 1000
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        startTime = DateTime.Now
        Timer1.Start()
    End Sub

    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
        Label1.Text = (TimeSpan.FromMinutes(5) - (DateTime.Now - startTime)).ToString("mm\:ss")
    End Sub
End Class

问候，

Frankie

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