C# winform三種定時方法

1. 直接用winform 的 timers

拖控件進去

代碼

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(); //窗體2返回在窗體2寫代碼 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，不精確

        {

            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

先定義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);//到達時間的時候執行事件；

            t.AutoReset = true;//設置是執行一次（false）仍是一直執行(true)；

       

        }

 private void button2_Click(object sender, EventArgs e)

        {

            t.Enabled = true;//是否執行System.Timers.Timer.Elapsed事件；

            //若是不寫下面這句會有一個異常。

            //異常：線程間操做無效: 從不是建立控件"richtextbox"的線程訪問它

            //但這不是最好的方法。若是隻有一個進程調用richtextbox而已。就能夠用下面這句

            //若是有多個線程調用richtextbox等控件。就要用委託。見thread第二種方法

 

            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;//定義線程

 

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，不寫會報錯

            

        }

  private void calculate()//線程的第一種方法

        {

            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);

            }

        }

 

 

下面第二種方法：

         private delegate void FlushClient();//定義委託

 

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

        {

            textBox1.Text = "00.00";

 

            th = new Thread(CrossThreadFlush);//線程第二種方法

            th.IsBackground = true;

                 

        }

 private void CrossThreadFlush()//第二種方法

        {

            while (true)

            {

                Thread.Sleep(1000);

                ThreadFunction(); 

            }

        }

 

        private void ThreadFunction()//第二種方法

        {

            if (this.textBox1.InvokeRequired)//等待異步             

            {                 

                FlushClient fc = new FlushClient(ThreadFunction); 

                this.Invoke(fc);//經過代理調用刷新方法            

            }             

            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();           

            } 

          }