如何在charp中为Quiz应用程序计算Reamaining时间（以分钟为单位） [英] How to calulate the Reamaining time in minutes for Quiz application in charp

问题描述

您好我正在开发一些Quiz应用程序，我想知道如何在用户点击开始测验按钮时向用户显示剩余时间为30分钟。在尖锐的Windows应用程序中.plz help

Hello I am Developing some Quiz application for that i want to know how to show the remaining time for user as 30 Minutes to the user when he clicks on the start quiz button .in c sharp windows application .plz help

推荐答案

那么？设置一个计时器和一个剩余时间变量：

So? Set up a Timer, and a time left variable:

private Timer time = new Timer();
private int timeRemaining;

在Form构造函数中添加所需的interval和事件处理程序：

In your Form constructor add the required interval, and the event handler:

time.Interval = 500;
time.Tick += new EventHandler(time_Tick);
timeRemaining = 30 * 60 * 2;
time.Start();

timeRemaining值为30分钟，以秒为单位，以每秒滴答为单位（间隔为500，每半秒）

然后Tick事件处理程序：

The timeRemaining value is 30 minutes, in seconds, in ticks per second (interval of 500 is every half second)
Then the Tick event handler:

void time_Tick(object sender, EventArgs e)
    {
    if (timeRemaining > 0)
        {
        timeRemaining--;
        int seconds = timeRemaining / 2;
        int minutes = seconds / 60;
        labTimeRemaining.Text = string.Format("{0:00}:{1:00}", minutes, seconds % 60);
        }
    }

有什么问题？

初始化 DatetTime 对象（比如完成），

What is the problem?
Initialize a DatetTime object (say finish) with

finish = DateTime.Now + TimeSpan.FromMinutes(30);

然后，稍后（只要你需要），剩余的分钟数将是

then, later (whenever you need it), the remaining minutes would be

int remaining = 0;
DateTime now = DateTime.Now;
if ( finish  > now)
  remaining = (int) (finish - now).TotalMinutes;

private void Form1_Load(object sender, EventArgs e)
{
    Watch w = new Watch(new TimeSpan(0, 30, 0)); // assign the time from where clock start.

    var rTime1 = w.RemainingTime; // further more you can use timer and in timer's elapsed event continuousely get w.RemaningTime
    Thread.Sleep(5000);
    rTime1 = w.RemainingTime;
    Thread.Sleep(10000);
    rTime1 = w.RemainingTime;
}

 public class Watch
{
    private DateTime _time;

    public Watch(TimeSpan time)
    {
        _time = DateTime.Now.Add(time);
    }

    public TimeSpan RemainingTime
    {
        get
        {
            var remainingTime = _time - DateTime.Now;

            if (remainingTime < TimeSpan.Zero)
            {
                return TimeSpan.Zero;
            }
            else
            {
                return remainingTime;
            }
        }
    }
}

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