多线程的简单问题

Question

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private Thread myThread = new Thread(new ThreadStart(runWork));  //错误 1 字段初始值设定项无法引用非静态字段、方法或属性“WindowsApplication1.Form1.runWork()” D:\测试\测试例程(C#)\WindowsApplication1\Form1.cs 19 46 WindowsApplication1        private delegate void MyInvoke(int percent);
        private MyInvoke showResult = new MyInvoke(showInvoke);  //错误 1 字段初始值设定项无法引用非静态字段、方法或属性“WindowsApplication1.Form1.runWork()” D:\测试\测试例程(C#)\WindowsApplication1\Form1.cs 19 46 WindowsApplication1
        private void runWork()
        {
            for(int i = 0; i< 100; i++)
            {
                BeginInvoke(showResult, i);
                Thread.Sleep(100);
            }
        }        private void showInvoke(int percent)
        {
            textBoxPercentage.Text = percent + "%";
            progressBarPercentage.Value = percent;
            if(percent == 100)
            {
                MessageBox.Show("任务完成！");
                myThread.Abort();
            }
        }        private void Form1_Load(object sender, EventArgs e)
        {
            progressBarPercentage.Minimum = 0;
            progressBarPercentage.Maximum = 100;
        }        private void buttonStart_Click(object sender, EventArgs e)
        {
            myThread.Start();
        }
    }
}

Answer 1

private Thread myThread = new Thread(new ThreadStart(runWork));  放到
private void Form1_Load(object sender, EventArgs e)中

Answer 2

 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();myThread=new Thread(new ThreadStart(runWork)); 
 showResult=new MyInvoke(showInvoke); 
        }        private Thread myThread =null;  
        private delegate void MyInvoke(int percent);
        private MyInvoke showResult =null;        private void runWork()
        {
            for(int i = 0; i< 100; i++)
            {
                BeginInvoke(showResult, i);
                Thread.Sleep(100);
            }
        }        private void showInvoke(int percent)
        {
            textBoxPercentage.Text = percent + "%";
            progressBarPercentage.Value = percent;
            if(percent == 100)
            {
                MessageBox.Show("任务完成！");
                myThread.Abort();
            }
        }        private void Form1_Load(object sender, EventArgs e)
        {
            progressBarPercentage.Minimum = 0;
            progressBarPercentage.Maximum = 100;
        }        private void buttonStart_Click(object sender, EventArgs e)
        {
            myThread.Start();
        }
    }