C# 多线程（入门级示例）

【实例截图】

【核心代码】

 public partial class 多线程和委托 : Form
    {
        public 多线程和委托()
        {
            InitializeComponent();
        }

        Thread drawThread = null;
        delegate void drawDelegate(int i);

        //开启子线程  
        private void btnTest_Click(object sender, EventArgs e)
        {
            closeThread();

            drawThread = new Thread(new ThreadStart(draw));
            drawThread.IsBackground = true;
            drawThread.Start();
        }

        //draw子线程，循环调用test函数,并且等待一会  
        private void draw()
        {
            try
            {
                for (int i = 0; i < 100000000; i )
                {
                    test(i);
                    Thread.Sleep(100);
                }
            }
            catch (System.Exception e1)
            {
                return;
            }

            closeThread();
        }

        //test函数，向textBox中添加数据  
        private void test(int i)
        {
            if (textBox1.InvokeRequired)
            {
                drawDelegate d = new drawDelegate(test);
                Invoke(d, new object[] { i });
            }
            else
            {
                textBox1.AppendText(i.ToString() "\r\n");
            }
        }

        //结束子线程  
        private void closeThread()
        {
            if (drawThread != null)
            {
                if (drawThread.IsAlive)
                {
                    drawThread.Abort();
                }
            }
        }

        //窗体关闭时，关闭子线程  
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            closeThread();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            closeThread();

            drawThread = new Thread(new ThreadStart(draw));
            drawThread.IsBackground = true;
            drawThread.Start();
        }


        private void 多线程和委托_FormClosing(object sender, FormClosingEventArgs e)
        {
            closeThread();
        }