public delegate void dele();
  public partial class Form1 : Form
  {
    int idA;
    public dele getlab;
    public Form1()
    {
      InitializeComponent();
      idA = Thread.CurrentThread.ManagedThreadId;//UI界面主線程
      /*
       * Main函數(shù)為主線程，id標(biāo)示符與UI界面主線程相同。
       */
    }

    Thread thread;
    private void getbtu_Click(object sender, EventArgs e)//UI控件屬于主線程
    {
      int idB = Thread.CurrentThread.ManagedThreadId;
      getlab = new dele(getLabel);//委托添加方法
      getlab += new dele(gg);//委托在疊加一個(gè)方法
      getlab += new dele(kk);//委托在疊加一個(gè)方法
      //
      thread = new Thread(new ThreadStart(delegate
      {
        int idC = Thread.CurrentThread.ManagedThreadId;//Thread開辟一個(gè)子線程
        //gg();//方法直接在thread里面調(diào)用均為子線程
        //kk();//方法直接在thread里面調(diào)用均為子線程
        getlab();//委托直接在thread里面調(diào)用，委托里面的方法為子線程

        //以上因?yàn)槎及趖hread里面
        MessageBox.Show("顯示完成");

        //this.Invoke(getlab);
        /*錯(cuò)誤提示：主線程調(diào)用主線程當(dāng)然會(huì)假死*/
      }));
      thread.IsBackground = true;
      thread.Start();
    }
    public void kk()//委托中的方法 委托方法三
    {
      int idR = Thread.CurrentThread.ManagedThreadId;
      this.Invoke((dele)(() =>//修改UI界面值則需要加this.Invoke
      {         
          label2.Text = "ABC";
      }));
    }
    public void gg()//委托中的方法 委托方法二
    {
      int idP = Thread.CurrentThread.ManagedThreadId;
      this.Invoke((dele)(() =>//修改UI界面值則需要加this.Invoke
      {
          label3.Text = "QWE";
      }));
    }
    public void getLabel()//委托中的方法 委托方法一
    {    
      int idD = Thread.CurrentThread.ManagedThreadId;//子線程

      for (int i = 0; i <= 1000; i++)
      {
        Thread.Sleep(10);
        //this.Invoke為主線程，執(zhí)行子線程的內(nèi)容
        this.Invoke((dele)(() =>
        {
          getlabel.Text = i.ToString();
          int idE = Thread.CurrentThread.ManagedThreadId;//主線程
          Console.WriteLine("線程idE:" + idE);
        }));
        Console.WriteLine(i);
      }
      MessageBox.Show("顯示完成");
    }

    private void sleepbtu_Click(object sender, EventArgs e)//UI控件屬于主線程
    {
      int idF = Thread.CurrentThread.ManagedThreadId;
      try
      {
        if (thread.ThreadState != ThreadState.Suspended)
        {
          thread.Suspend();
        }
      }
      catch (Exception r)
      {
        MessageBox.Show(r.Message);
      }
    }

    private void setbtu_Click(object sender, EventArgs e)//UI控件屬于主線程
    {
      int idG = Thread.CurrentThread.ManagedThreadId;
      try
      {
        if (thread.ThreadState != ThreadState.Running)
        {
          thread.Resume();
        }
      }
      catch (Exception r)
      {
        MessageBox.Show(r.Message);
      }
    }

    public void getlabel_Click(object sender, EventArgs e)
    {

    }
  }