问题描述
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我有一个int值为60的lblCountdown。我想使lblCountDown的int值以秒为单位减小,直到达到0。
这是我到目前为止的内容:
private int counter = 60;
private void button1_Click(object sender,EventArgs e)
{
int counter = 60;
timer1 = new Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000; // 1 second
timer1.Start();
label1.Text = counter.ToString();
}
private void timer1_Tick(object sender,EventArgs e)
{
counter--;
if (counter == 0)
timer1.Stop();
label1.Text = counter.ToString();
}
解决方法
为此使用计时器
private System.Windows.Forms.Timer timer1;
private int counter = 60;
private void btnStart_Click_1(object sender,EventArgs e)
{
timer1 = new System.Windows.Forms.Timer();
timer1.Tick += new EventHandler(timer1_Tick);
timer1.Interval = 1000; // 1 second
timer1.Start();
lblCountDown.Text = counter.ToString();
}
private void timer1_Tick(object sender,EventArgs e)
{
counter--;
if (counter == 0)
timer1.Stop();
lblCountDown.Text = counter.ToString();
}
, int segundo = 0;
DateTime dt = new DateTime();
private void timer1_Tick(object sender,EventArgs e){
segundo++;
label1.Text = dt.AddSeconds(segundo).ToString(\"HH:mm:ss\");
}
,
。
用法:
CountDownTimer timer = new CountDownTimer();
//set to 30 mins
timer.SetTime(30,0);
timer.Start();
//update label text
timer.TimeChanged += () => Label1.Text = timer.TimeLeftMsStr;
// show messageBox on timer = 00:00.000
timer.CountDownFinished += () => MessageBox.Show(\"Timer finished the work!\");
//timer step. By default is 1 second
timer.StepMs = 33;
当计时器对您无用时,别忘了to4。
源代码:
using System;
using System.Windows.Forms;
public class CountDownTimer : IDisposable
{
public Action TimeChanged;
public Action CountDownFinished;
public bool IsRunnign => timer.Enabled;
public int StepMs
{
get => timer.Interval;
set => timer.Interval = value;
}
private Timer timer = new Timer();
private DateTime _maxTime = new DateTime(1,1,30,0);
private DateTime _minTime = new DateTime(1,0);
public DateTime TimeLeft { get; private set; }
private long TimeLeftMs => TimeLeft.Ticks / TimeSpan.TicksPerMillisecond;
public string TimeLeftStr => TimeLeft.ToString(\"mm:ss\");
public string TimeLeftMsStr => TimeLeft.ToString(\"mm:ss.fff\");
private void TimerTick(object sender,EventArgs e)
{
if (TimeLeftMs > timer.Interval)
{
TimeLeft = TimeLeft.AddMilliseconds(-timer.Interval);
TimeChanged?.Invoke();
}
else
{
Stop();
TimeLeft = _minTime;
TimeChanged?.Invoke();
CountDownFinished?.Invoke();
}
}
public CountDownTimer(int min,int sec)
{
SetTime(min,sec);
Init();
}
public CountDownTimer(DateTime dt)
{
SetTime(dt);
Init();
}
public CountDownTimer()
{
Init();
}
private void Init()
{
TimeLeft = _maxTime;
StepMs = 1000;
timer.Tick += new EventHandler(TimerTick);
}
public void SetTime(DateTime dt) {
TimeLeft = _maxTime = dt;
TimeChanged?.Invoke();
}
public void SetTime(int min,int sec=0) => SetTime(new DateTime(1,min,sec));
public void Start() => timer.Start();
public void Pause() => timer.Stop();
public void Stop()
{
Pause();
Reset();
}
public void Reset()
{
TimeLeft = _maxTime;
}
public void Restart()
{
Reset();
Start();
}
public void Dispose() => timer.Dispose();
}
, 您将需要使用Timer并挂钩到Tick事件中以执行所需的操作。
http://msdn.microsoft.com/zh-CN/library/system.windows.forms.timer.aspx
, 如何使用.NET Framework中的Timer类?
http://msdn.microsoft.com/zh-CN/library/0tcs6ww8.aspx
, 嘿,请在您的项目中添加代码,这很容易,我想可以解决您的问题。
int count = 10;
private void timer1_Tick(object sender,EventArgs e)
{
count--;
if (count != 0 && count > 0)
{
label1.Text = count / 60 + \":\" + ((count % 60) >= 10 ? (count % 60).ToString() : \"0\" + (count % 60));
}
else
{
label1.Text = \"game over\";
}
}
private void Form1_Load(object sender,EventArgs e)
{
timer1 = new System.Windows.Forms.Timer();
timer1.Interval = 1;
timer1.Tick += new EventHandler(timer1_Tick);
}
, 您需要一个公共类供Form1初始化。
参见以下代码:
namespace TimerApp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private int counter = 60;
private void button1_Click(object sender,EventArgs e)
{
//Insert your code from before
}
private void timer1_Tick(object sender,EventArgs e)
{
//Again insert your code
}
}
}
我已经尝试过了,一切都很好
如果您需要帮助,请随时发表评论:)