C#线程的暂停和停止问题 暂停后无法停止怎么解决？

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;
using System.Diagnostics;
namespace youlaiyouqu
{
    public partial class Form1 : Form
    {        public Form1()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
            th = new Thread(new ThreadStart(run));
            th.IsBackground = true;
        }
        Thread th;
        public void run()
        {
                    while (true)
                    {
                        for (int i = 0; i <= 32; i++)
                        {
                            this.pictureBox1.Left = this.pictureBox1.Left + i;
                            Thread.Sleep(122);
                        }
                        for (int i = 0; i < 26; i++)
                        {
                            this.pictureBox1.Top = this.pictureBox1.Top + i;
                            Thread.Sleep(100);
                        }
                        for (int i = 0; i <= 32; i++)
                        {
                            this.pictureBox1.Left = this.pictureBox1.Left - i;
                            Thread.Sleep(122);
                        }
                        for (int i = 0; i < 26; i++)
                        {
                            this.pictureBox1.Top = this.pictureBox1.Top - i;
                            Thread.Sleep(100);
                        }
                    }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (th != null)
            {
                th.Abort();
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {              
                if (this.button1.Text == "开始")
                {                    this.button1.Text = "暂停";
                    th.Start();
                    this.button2.Enabled = true;                }
                else if (this.button1.Text == "暂停")
                {
                    this.button1.Text = "继续";
                    th.Suspend();
                    this.button2.Enabled = false;
                }
                else if (this.button1.Text == "继续")
                {
                    this.button1.Text = "暂停";
                    th.Resume();
                    this.button2.Enabled = true;
                }
        }        private void button2_Click(object sender, EventArgs e)
        {
            if(this.button2.Text=="停止")
            {
                th.Abort();
                this.button1.Text = "开始";
                th = new Thread(new ThreadStart(run));
                th.IsBackground = true;
            }
            this.button1.Enabled = true;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            //OpenFileDialog ofDialog = new OpenFileDialog();
            //ofDialog.AddExtension = true;
            //ofDialog.CheckFileExists = true;
            //ofDialog.CheckPathExists = true;
            //ofDialog.Filter = "swf   文件   (*.swf)|*.swf|所有文件   (*.*)|*.*";
            //ofDialog.DefaultExt = "mp3";
            //if (ofDialog.ShowDialog() == DialogResult.OK)
            //{
            //    //   设定播放的文件名   
            //    this.axShockwaveFlash1.Movie = ofDialog.FileName;
            //    //   播放flash文件   
            //    this.axShockwaveFlash1.Play();
            //}   
            this.button1.Enabled = true;
            this.button2.Enabled = false;
        }
当我点开始 再点下就暂停  暂停后再点下停止 就报错 挂起的无法停止  怎么解决 还有在窗体背景中怎么插flash  和背景 音乐   网上找半天 都没看明白咋样插的 我注释了 可以帮小弟 写清楚么？

Answer 1

二、播放Flash动画    播放Flash动画的原理与声音差不多，也是直接引用Flash的dll，不过这个dll不能直接在“COM 组件”窗口中找到，需要我们手动添加，选择菜单中的“工具”--“自定义工具箱”，打开“自定义工具箱”窗口，在“COM 组件”中点击“浏览”键，然后选择“c:\\WINNT(WINDOWS)\\system32\\MacromedFlashswflash.ocx" 控件，确定后在工具箱中就可以看到“FlashFactory”，“ShockwaveFlash”两个新控件，我们需要使用的是 “ShockwaveFlash”，将其拖到新建的Form上，然后再设置一些属性即可。下面是简单的操作代码，即打开swf文件，并播放它：private void menuItem2_Click(object sender, System.EventArgs e)
{ OpenFileDialog ofDialog = new OpenFileDialog();
ofDialog.AddExtension = true;
ofDialog.CheckFileExists = true;
ofDialog.CheckPathExists = true;
ofDialog.Filter = "swf 文件 (*.swf)|*.swf|所有文件 (*.*)|*.*";
ofDialog.DefaultExt = "mp3";
if(ofDialog.ShowDialog() == DialogResult.OK)
{
  this.axShockwaveFlash1.Movie = ofDialog.FileName;
  this.axShockwaveFlash1.Play();
}
}
点击“浏览”键，然后选择“c:\\WINNT(WINDOWS)\\system32\\MacromedFlashswflash.ocx" 控件
 找到眼都花了 也没看见~~~~~~~~~~~~~~~

Answer 2

ShockwaveFlash 播放flash时背景透明疑难使用BackgroundColor這個屬性改为-1  來改變ShockwaveFlash元件的背景顏色在设计窗口中为白色 但是打开程序窗体后还是全黑的  下面的一些元件全覆盖啦 不知道咋办  怎么让ShockwaveFlash元件播放flash时背景透明  flash为最底层

Answer 3

20分问题到挺多啊
暂停和恢复微软已经不建议用Abort和Resume方法，你编译的时候应该有警告
我给个暂停的例子吧using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Threading;namespace AutoResetEventTest
{
    public partial class Form1 : Form
    {
        private ManualResetEvent manualResetEvent;
        private AutoResetEvent auto;
        private bool suspend;
        private AsyncOperation asyncOperation;        public delegate void InvokeDelegate(string str);        private InvokeDelegate invokeDelegate;
        const string str = "Test";
        private bool formClosed;        public Form1()
        {
            InitializeComponent();
            manualResetEvent = new ManualResetEvent(false);
            auto = new AutoResetEvent(true);
            asyncOperation = AsyncOperationManager.CreateOperation(null);
            invokeDelegate = new InvokeDelegate(this.SafeInvoke);
            this.FormClosed += delegate
                                   {
                                       this.formClosed = true;
                                       this.auto.Close();
                                   };
        }        private void btnStart_Click(object sender, EventArgs e)
        {
            this.btnStart.Enabled = false;
            this.btnSuspend.Enabled = true;
            ThreadPool.QueueUserWorkItem(delegate
                                             {
                                                 SafeInvoke();                                                 //this.BeginInvoke(invokeDelegate, new object[] { str });
                                             });
        }        private void btnSuspend_Click(object sender, EventArgs e)
        {
            this.btnSuspend.Enabled = false;
            this.btnResume.Enabled = true;
            this.suspend = true;
            manualResetEvent.Reset();
        }        private void SafeInvoke(string s)
        {
            while (true)
            {
                if (formClosed)
                    return;                Thread.Sleep(200);                if (suspend)
                    this.auto.WaitOne();
                this.txtMessageBox.AppendText(s);
            }
        }        private void SafeInvoke()
        {
            while (true)
            {
                if (formClosed)
                    return;                Thread.Sleep(200);                if (suspend)
                    //this.auto.WaitOne();
                    manualResetEvent.WaitOne();                asyncOperation.Post(delegate
                                    {
                                        this.txtMessageBox.AppendText(str);
                                    }, str);
            }        }        private void btnResume_Click(object sender, EventArgs e)
        {
            this.btnResume.Enabled = false;
            this.btnSuspend.Enabled = true;
            this.suspend = false;
            //this.auto.Set();
            manualResetEvent.Set();
        }
    }
}

Answer 4

窗体里有4个按钮 和一个richtextbox

Answer 5

//static AutoResetEvent myResetEvent = new AutoResetEvent(false);
//static AutoResetEvent ChangeEvent = new AutoResetEvent(false);
static ManualResetEvent myResetEvent = new ManualResetEvent(false);
static ManualResetEvent ChangeEvent = new ManualResetEvent(false);
myResetEvent.set(); myResetEvent.Reset();