C# winform三种定时方法

1. 直接用winform 的 timers

拖控件进去

代码

public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        int sum = 0;

        int qian;

        int bai;

        int shi;

        int ge;

 

private void Form1_Load(object sender, EventArgs e)//初始化

        {

            textBox1.Text = "00.00";

            timer1.Interval = 1000;

            timer1.Stop();

        }

 

private void button1_Click(object sender, EventArgs e)

        {

            Form2 f2 = new Form2();

            f2.Owner = this;

            this.Hide();

            f2.Show(); //窗体2返回在窗体2写代码 this.Hide();  this.Owner.Show();

        }

 

 private void button2_Click(object sender, EventArgs e)

        {

 

            timer1.Start();

        }

 private void timer1_Tick(object sender, EventArgs e)//winform的timer，不精确

        {

            sum++;

            qian = sum / 1000;

            bai = sum % 1000 / 100;

            shi = sum % 100 / 10;

            ge = sum % 10;

            textBox1.Text = qian.ToString() + bai.ToString() + "." + shi.ToString() + ge.ToString();

            

        }

 

 

2.使用System.Timers.Timer

先定义System.Timers.Timer t;

 

 private void Form1_Load(object sender, EventArgs e)//初始化

        {

            textBox1.Text = "00.00";

            t = new System.Timers.Timer(1000);

            t.Elapsed += new System.Timers.ElapsedEventHandler(theout);//到达时间的时候执行事件；

            t.AutoReset = true;//设置是执行一次（false）还是一直执行(true)；

       

        }

 private void button2_Click(object sender, EventArgs e)

        {

            t.Enabled = true;//是否执行System.Timers.Timer.Elapsed事件；

            //如果不写下面这句会有一个异常。

            //异常：线程间操作无效: 从不是创建控件"richtextbox"的线程访问它

            //但这不是最好的方法。如果只有一个进程调用richtextbox而已。就可以用下面这句

            //如果有多个线程调用richtextbox等控件。就要用委托。见thread第二种方法

 

            Control.CheckForIllegalCrossThreadCalls = false;

            

        }

private void theout(object sender, EventArgs e)

        {

            sum++;

            qian = sum / 1000;

            bai = sum % 1000 / 100;

            shi = sum % 100 / 10;

            ge = sum % 10;

            textBox1.Text = qian.ToString() + bai.ToString() + "." + shi.ToString() + ge.ToString();

        }

 

3.thread

       Thread th;//定义线程

 

private void Form1_Load(object sender, EventArgs e)//初始化

        {

            textBox1.Text = "00.00";

 

            th=new Thread(calculate);

            th.IsBackground = true;

           

         

        }

 

private void button2_Click(object sender, EventArgs e)

        {

 

            th.Start();

            //Control.CheckForIllegalCrossThreadCalls = false;  同2，不写会报错

            

        }

  private void calculate()//线程的第一种方法

        {

            while(true)

            {

                sum++;

                qian = sum / 1000;

                bai = sum % 1000 / 100;

                shi = sum % 100 / 10;

                ge = sum % 10;

                textBox1.Text = qian.ToString() + bai.ToString() + "." + shi.ToString() + ge.ToString();

                Thread.Sleep(1000);

            }

        }

 

 

下面第二种方法：

         private delegate void FlushClient();//定义委托

 

private void Form1_Load(object sender, EventArgs e)//初始化

        {

            textBox1.Text = "00.00";

 

            th = new Thread(CrossThreadFlush);//线程第二种方法

            th.IsBackground = true;

                 

        }

 private void CrossThreadFlush()//第二种方法

        {

            while (true)

            {

                Thread.Sleep(1000);

                ThreadFunction(); 

            }

        }

 

        private void ThreadFunction()//第二种方法

        {

            if (this.textBox1.InvokeRequired)//等待异步             

            {                 

                FlushClient fc = new FlushClient(ThreadFunction); 

                this.Invoke(fc);//通过代理调用刷新方法            

            }             

            else           

            {

                sum++;

                qian = sum / 1000;

                bai = sum % 1000 / 100;

                shi = sum % 100 / 10;

                ge = sum % 10;

                textBox1.Text = qian.ToString() + bai.ToString() + "." + shi.ToString() + ge.ToString();           

            } 

          }