线程简单示例

 
 

  
  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();
        }
    }
}