单线程中如何判断线程是开始还是暂停

Question

ManualResetEvent通过信号量来控制线程

Answer 1

    public partial class Form1 : Form
    {
        Thread th1;
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            if (th1 == null)
            {
                th1 = new Thread(Thread1);
                th1.IsBackground = true;
                th1.Start();
            }
            else if ((th1.ThreadState & ThreadState.Suspended) == ThreadState.Suspended)
            {
                th1.Resume();
            }        }        private void Thread1()
        {
            int i = 0;
            Action a = ()=>this.richTextBox1.Text = i.ToString();
            while (true)
            {
                ++i;
                Thread.Sleep(1000);
                this.Invoke(a);
            }
        }        private void btnPause_Click(object sender, EventArgs e)
        {
            th1.Suspend();
        }
    }

Answer 2

Button1是开始btnPause是暂停，循环往richTextBox1打数字，就是利用suspend和resume方法。。不知道是不是你要的效果

Answer 3

而且所谓线程暂停,应该是暂停线程里面的代码逻辑
而只有在while循环的时候才需要所谓的暂停,没有循环的话,线程一下就跑完了
所以循环里面加个if就好了,如果是暂停状态,就执行sleep

Answer 4

谢谢@wmg494005678 你发的代码跟我想要的效果差不多  代码也很全面非常感谢你   
@Z65443344 你发给 我的逻辑很清晰也很好也非常感谢你

Answer 5

protected Thread thTest = null;        protected void btnRunOrPause_Click(object sender, EventArgs e)
        {
            if (thTest == null)
            {
                thTest = new Thread(new ThreadStart(RunOrPauseThread));
                thTest.IsBackground = true;
                thTest.Start();
            }
            else
            {
                switch ((int)thTest.ThreadState)
                {
                    case (int)ThreadState.Running:
                        thTest.Suspend();
                        break;
                    case (int)ThreadState.Suspended:
                        thTest.Resume();
                        break;
                    default: break;
                }
            }
        }        protected void RunOrPauseThread()
        { 
            // do something
        }

Answer 6

线程的暂停，继续，看楼上的好像貌似 写的比我简单的多的啊
        BackgroundWorker bw = null;
        //创建ManualResetEvent
        ManualResetEvent mr = new ManualResetEvent(true);//启动背景线程
         private void button1_Click(object sender, EventArgs e)
        {
            CP_load.Visible = true;            bw = new BackgroundWorker();
            bw.WorkerSupportsCancellation = true;
            bw.WorkerReportsProgress = true;            bw.DoWork += new DoWorkEventHandler(bw_DoWork);
            bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
            bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);            bw.RunWorkerAsync();        }//暂停继续
   private void button3_Click(object sender, EventArgs e)
        {
            Button b = (Button)sender;
            if (b.Text == "暂停")
            {
                mr.Reset();
                b.Text = "继续";
            }
            else
            {
                mr.Set();
                b.Text = "暂停";
            }        }  //线程中执行事件，控制暂停继续的地方
  void bw_DoWork(object sender, DoWorkEventArgs e)
        {
            for (int i = 0; i <= 1000; i++)
            {
                if (bw.CancellationPending)
                {
                    e.Cancel = true;
                    return;
                }
                this.Invoke((MethodInvoker)delegate
                {
                    this.richTextBox1.Text += i + Environment.NewLine;
                });
 
                bw.ReportProgress(i,i);                //接受指令
                mr.WaitOne();
            }
        }
//及时返回 百分比到UI上，更新UI。
      void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            
            CP_load.Value = (int)(((double)e.ProgressPercentage / (double)1000 * 100));
            CP_load.ProgressText = CP_load.Value.ToString();            if (CP_load.Value == 100)
            {
                CP_load.Visible = false;
            }        }