Question

c#实现5分钟倒计时实例

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
DateTime fiveM = new DateTime();
Timer timer = new Timer();

public Form1()
{
InitializeComponent();
timer.Tick += new EventHandler(timer_Tick);
fiveM = DateTime.Parse("00:05:00");
label1.Text = fiveM.Hour.ToString("00") + ":" + fiveM.Minute.ToString("00") + ":" + fiveM.Second.ToString("00");
timer.Interval = 1000;
timer.Start();
}

void timer_Tick(object sender, EventArgs e)
{
if (fiveM !=Convert.ToDateTime("00:00:00"))
{
fiveM = fiveM.AddSeconds(-1);
label1.Text = fiveM.Hour.ToString("00") + ":" + fiveM.Minute.ToString("00") + ":" + fiveM.Second.ToString("00");
}
else
timer.Stop();
}
}
}
有现成的datetime类干嘛还要复杂化,楼上的?楼主,直接copy就OK,拉一个label

Answer 2

可以给个思路你，先获取当前时间，用DateTime。
在当前时间加上5分钟。
开启Timer控件开始计时。
每过1秒钟就执行一次TICK事件。
然后用加上了5分钟的这个时间减去当前时间就是倒计时剩余时间了

Answer 3

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
DateTime fiveM = new DateTime();
Timer timer = new Timer();

public Form1()
{
InitializeComponent();
timer.Tick += new EventHandler(timer_Tick);
fiveM = DateTime.Parse("00:05:00");
label1.Text = fiveM.Hour.ToString("00") + ":" + fiveM.Minute.ToString("00") + ":" + fiveM.Second.ToString("00");
timer.Interval = 1000;
timer.Start();
}

void timer_Tick(object sender, EventArgs e)
{
if (fiveM !=Convert.ToDateTime("00:00:00"))
{
fiveM = fiveM.AddSeconds(-1);
label1.Text = fiveM.Hour.ToString("00") + ":" + fiveM.Minute.ToString("00") + ":" + fiveM.Second.ToString("00");
}
else
timer.Stop();
}
}
}

Answer 4

timer 没一秒执行一次.. 开一个线程. sleep(1000) 同样每一秒执行一次.然后用位图INVOKE到主线程调用窗体内容. 还有让自己SLEEP(1000) 让主线程自己睡1秒. 循环1*60*5 次即可. 方法甚多..

Answer 5

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication14
{
public partial class Form1 : Form
{
int i = 300,mm,ss;
public Form1()
{
InitializeComponent();
}

private void timer1_Tick(object sender, EventArgs e)
{
i--;
mm = i / 60;
ss = i - mm * 60;
label1.Text = Convert.ToString(mm)+"分"+Convert.ToString(ss)+"秒";

}

private void Form1_Load(object sender, EventArgs e)
{
timer1.Start();
}
}
}
这个是所有的代码，控件自己会弄把