2

我有 3 个文本框（小时、分钟、秒）、一个开始、暂停和停止按钮，我正在使用标签来显示当前计时器。我也有一个间隔为1000. 我的问题是为什么不使用标签显示时间？其他一切正常，只是不会注册我已将值放入文本框中。

代码

启动定时器：

    private void startbutton_Click(object sender, EventArgs e)
    {
        if (paused != true) //Timer is not paused (active)
        {

            int.TryParse(textBoxhrs.Text, out hours);
            int.TryParse(textBoxmin.Text, out minutes);
            int.TryParse(textBoxsec.Text, out seconds);

            if (hours >= 1 || (minutes >= 1) || (seconds >= 1))

            //If there is at least one integer entered in any of the 3 boxes, executes; else - //throws an exception
            {
                startbutton.Enabled = true;
                pausebutton.Enabled = true; //changed the value to 'true'  
                stopbutton.Enabled = true; //changed the value to 'true'
                textBoxhrs.Enabled = false;
                textBoxmin.Enabled = false;
                textBoxsec.Enabled = false;
            }
            else
            {
                MessageBox.Show("Enter at least one integer!");
            }
        }
    }

    private void stopbutton_Click(object sender, EventArgs e)
    {
        // Stop the timer. 
        paused = false;
        timer1.Enabled = false;
        startbutton.Enabled = true; //changed to true
        stopbutton.Enabled = false; //changed to false
        pausebutton.Enabled = false; //changed to false
        textBoxsec.Clear();
        textBoxmin.Clear();
        textBoxhrs.Clear();
        textBoxhrs.Enabled = true;
        textBoxsec.Enabled = true;
        textBoxmin.Enabled = true;
        textBoxhrs.Enabled = true;
        lblHr1.Text = "00";
        lblMin1.Text = "00";
        lblSec1.Text = "00";
        MessageBox.Show("Timer is Stopped, to re-start press <Start>"); //updated to give user a chance to run the timer again after stoppage.

    }

暂停按钮：

    private void pausebutton_Click(object sender, EventArgs e)
    {
        // Pause the timer. 
        timer1.Enabled = false;
        paused = true; //
        startbutton.Enabled = true; // changed to true
        pausebutton.Enabled = false; //changed to false
    }

定时器：

    private void timer1_Tick(object sender, EventArgs e)
    {
        // Verify if the time didn't pass.
        if ((minutes == 0) && (hours == 0) && (seconds == 0))
        {
            // If the time is over, clear all settings and fields.
            // Also, show the message, notifying that the time is over.
            timer1.Enabled = false;
            MessageBox.Show(textBoxMsg.Text);
            pausebutton.Enabled = false;
            stopbutton.Enabled = false;
            startbutton.Enabled = true;
            textBoxMsg.Clear();
            textBoxsec.Clear();
            textBoxmin.Clear();
            textBoxhrs.Enabled = true;
            textBoxMsg.Enabled = true;
            textBoxsec.Enabled = true;
            textBoxmin.Enabled = true;
            textBoxhrs.Enabled = true;
            lblHr1.Text = "00";
            lblMin1.Text = "00";
            lblSec1.Text = "00";
        }
        else
        {
            // Else continue counting.
            if (seconds < 1)
            {
                seconds = 59;
                if (minutes == 0)
                {
                    minutes = 59;
                    if (hours != 0)
                        hours -= 1;

                }
                else
                {
                    minutes -= 1;
                }
            }
            else
                seconds -= 1;
            // Display the current values of hours, minutes and seconds in
            // the corresponding fields.
            lblHr1.Text = hours.ToString();
            lblMin1.Text = minutes.ToString();
            lblSec1.Text = seconds.ToString();
        }
    }
4

2 回答 2

2

代码还有其他问题，但是您看不到标签更新的原因是因为您从未真正启动计时器。

在开始单击中，您需要添加：

...
stopbutton.Enabled = true; //changed the value to 'true'
textBoxhrs.Enabled = false;
textBoxmin.Enabled = false;
textBoxsec.Enabled = false;

timer1.Start();  //<-- start the timer object
于 2012-05-13T23:59:03.360 回答
2

您需要做两件事才能使其正常工作：

您需要在 startbutton_Click 中启动计时器：

if (hours >= 1 || (minutes >= 1) || (seconds >= 1))

//If there is at least one integer entered in any of the 3 boxes, executes; else - //throws an exception
{
    startbutton.Enabled = true;
    ...
    timer1.Enabled = true;
}

您需要将计时器 Tick 事件连接到 timer1_Tick。您可以通过选择计时器并单击属性框架上的闪电工具栏图标来执行此操作，然后为 Tick 选择 timer1_Tick。

于 2012-05-14T00:02:16.573 回答