在线求解答——C#多线程————————————————

Question

初次和线程打交道。想做一个这样的例子， 5个按钮分别控制5个进度条， 点击后各自显示进度，但是后台代码遇到问题， 晕了：贴出来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 Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        Thread MainThread;
        private void button1_Click(object sender, EventArgs e)
        {
          
            ProgressBar prb = sender as ProgressBar;
            Thread th1 = new Thread(new ThreadStart());
            th1.Start();
           
        }        private void Form2_Load(object sender, EventArgs e)
        {
            MainThread = Thread.CurrentThread;
            MainThread.Name = "主线程";
        }        void DoThings(ProgressBar prb)
        {
            for (int i = prb.Minimum; i < prb.Maximum; i++)
            {
                prb.Value = i;
            }
        }
    }
} 主要就是在button1的事件处理中， 对Thread的声明出了问题， 一定要用委托吗？不能直接调用后面写的Dothing方法？参数怎么办？http://wenwen.soso.com/z/q236069021.htm?cid=q.t2.m

Answer 1

刚发现了个错误。 sender并不是ProgressBar， 我写错了， 

Answer 2

private void Run(ProgressBar pb)
        {
            ThreadPool.QueueUserWorkItem(new WaitCallback(delegate {
                while (true)
                {
                    Invoke(new MethodInvoker(delegate {
                        if (pb.Value >= pb.Maximum)
                        {
                            pb.Value = 0;
                        }
                        else
                        {
                            pb.Value++;
                        }
                    }));                    Thread.Sleep(10);
                }
            }));
        }        private void button1_Click(object sender, EventArgs e)
        {
            Run(progressBar1);
        }        private void button3_Click(object sender, EventArgs e)
        {
            Run(progressBar2);
        }        private void button2_Click(object sender, EventArgs e)
        {
            Run(progressBar3);
        }        private void button4_Click(object sender, EventArgs e)
        {
            Run(progressBar4);
        }        private void button5_Click(object sender, EventArgs e)
        {
            Run(progressBar5);
        }

Answer 3

3# ZengHD
效果是有了， 但是更迷糊了， 像这 ThreadPool.QueueUserWorkItem(new WaitCallback(delegate {
都是内置的吗？那像我那样 声明一个线程 Thread th=new Thread();
后面括号里的该接什么呢？必须是委托？如果想直接给方法， 可以么， 那该如何写呢

Answer 4

而且 如果点击顺序是这样的go5，go4，go3，go2，go1， 那么， 这段代码还是会优先执行go1和go2， 为什么不是5个同时执行呢？我理想的效果是 5个线程， 分别负责5个Progressbar， 同时执行

Answer 5

class ThreadDemo
{
private static  Thread _thread1;
...
private static Thread _threadi;
void Main()
{
_thread1=new Thread(new ThreadStart(Thread1Start()));
_thread1.Start();
}
private void Thread1Start()
{
//TODO:add code;
}
}

Answer 6

 Thread t1 = new Thread(new ThreadStart(无参数方法名，不带括号));
            Thread t2 = new Thread(new ParameterizedThreadStart(有1个参数方法名，不带括号));

Answer 7

还是报错，
 错误 1 “DoThings”的重载均与委托“System.Threading.ParameterizedThreadStart”不匹配 C:\Documents and Settings\lijun\桌面\lijun\WindowsApplication1\WindowsApplication1\Form2.cs 31 37 WindowsApplication1Dothings的方法在1楼的代码里

Answer 8

关键在这里吧
Invoke(new MethodInvoker(