三种timer控件的简单实例

 1 1.system.windows.forms

2.system.threading.timer

3.system.timers.timer

 

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

namespace winformTimer
{
public partial class Form1 : Form
{
//不精确 
public System.Windows.Forms.Timer timerEve;
public Form1()
{
InitializeComponent();
CheckForIllegalCrossThreadCalls = false;
}

private void button1_Click(object sender, EventArgs e)
{
timerEve = new System.Windows.Forms.Timer();
timerEve.Interval = 1000;
timerEve.Tick += timerEve_Tick;
timerEve.Start();
}

void timerEve_Tick(object sender, EventArgs e)
{
label1.Text = DateTime.Now.ToString();
}
public System.Timers.Timer timeEveTwo;
private void button2_Click(object sender, EventArgs e)
{
//Thread thread = new Thread(new ParameterizedThreadStart(theout));
//thread.Start();
timeEveTwo = new System.Timers.Timer(1000);
//到达时间，执行事件
timeEveTwo.Elapsed += new System.Timers.ElapsedEventHandler(theout);
//执行一次为false 一直执行为true
timeEveTwo.AutoReset = true;
timeEveTwo.Start();

}
public void theout(object source,System.Timers.ElapsedEventArgs e)
{
//if(label2.InvokeRequired)
//{
// Action<string> changetime = (s) => { label2.Text = s.ToString(); };
// label2.Invoke(changetime);
//}
//else
//{
label2.Text = DateTime.Now.ToString();
//}
}
//Callback：一个 TimerCallback 委托，表示要执行的方法。
//State：一个包含回调方法要使用的信息的对象，或者为空引用（Visual Basic 中为 Nothing）。
//dueTime：调用 callback 之前延迟的时间量（以毫秒为单位）。指定 Timeout.Infinite 以防止计时器开始计时。指定零 (0) 以立即启动计时器。
//Period：调用 callback 的时间间隔（以毫秒为单位）。指定 Timeout.Infinite 可以禁用定期终止。
public System.Threading.Timer threadtimer;

private void button3_Click(object sender, EventArgs e)
{
threadtimer = new System.Threading.Timer(new TimerCallback(timecall),null,0,1000);
}
private void timecall(object obj)
{
label3.Text = DateTime.Now.ToString(); 
}
}
}