FileCopy不会在进度条上显示复制的文件进度。它在复制操作完成时显示

问题描述

我有应用文件的Windows应用程序，进度条显示复制的进度。但是无法更新进度条。当复制操作完成时它会更新。

  public   partial   class  FileCopy：Form 
 {
  private  BackgroundWorker bw =  new  BackgroundWorker（ ）; 
  public  FileCopy（）
 {
 InitializeComponent（）; 
 bw.WorkerReportsProgress =  true ; 
 bw.WorkerSupportsCancellation =  true ; 
 bw.DoWork + =  new  DoWorkEventHandler（bw_DoWork）; 
 bw.ProgressChanged + =  new  ProgressChangedEventHandler（bw_ProgressChanged）; 
 bw.RunWorkerCompleted + =  new  RunWorkerCompletedEventHandler（bw_RunWorkerCompleted）; 
 
} 
 onstartButtonClick（）
 {
线程readerThread = 新线程（ new  ThreadStart（readData））; 
 readerThread.Start（）; 
线程writerThread =  new 线程（ new  ThreadStart（writeData））; 
 writerThread.Start（）; 
 writerThread.Join（）; 
 readerThread.Join（）; 
} 
 readData（）
 {
  while （length >   0 ）
 {
 data = br.ReadBytes（data.Length）; 
 Buffer.putData（data）; 
 length = length  -  data.Length; 
 Console.WriteLine（ 读取{0}，data.Length）; 
 bw.ReportProgress（ 10 ）; 
} 
 Buffer.STOP =  false ; 
 Buffer._reset.Set（）; 
} 
  private   void  bw_ProgressChanged（ object  sender，ProgressChangedEventArgs e）
 {
  this  .BeginInvoke（ new 操作（（）= >  
 {
 Console.WriteLine（ 内部开始调用）; 
 progressBar1.Value = e.ProgressPercentage; 
 Application.DoEvents（）; 
}） ）; 
 
} 
  public   void  writeData（）
 {
  while （Buffer.STOP）
 {
  if （ Buffer.STOP！=  false ）
 {
 Buffer._reset.WaitOne（）; 
  byte  [] data = Buffer.takeData（）; 
  if （data！=  null && Buffer.STOP ==  true ）
 {
 fs.Write（data， 0 ，data.Length）; 
 fs.Flush（）; 
} 
 Console.WriteLine（ 写入文件： +数据。长度）; 
 Buffer._reset.Reset（）; 
} 
} 
} 
} 
 静态  class 缓冲区
 {
  public   static   byte  [] _data =  new   byte  [ 10240 ]; 
  public   static  AutoResetEvent _reset =  new  AutoResetEvent（ false ）; 
 私有 静态  bool  _isStop =  true ; 
 
  public   static   bool  STOP 
 {
  get  
 {
  return  _isStop; 
} 
  set  
 {
 _isStop =  value  ; 
} 
} 
  public   static   void  putData（ byte  [] data）
 {
 _data = data; 
 Console.WriteLine（ 数据长度： + data.Length）; 
 _reset.Set（）; 
} 
  public   static   byte  [] takeData（）
 {
  return  _data; 
} 
} 
 

进度在运营结束时更新。

能否请您提出解决方案??

解决方案

I have windows application for coping file with progress bar showing copied progress.But could not update progress bar.Its get updated when copy operation is get completed.

public partial class FileCopy : Form
{
  private BackgroundWorker bw = new BackgroundWorker();
 public FileCopy()
       {
           InitializeComponent();
           bw.WorkerReportsProgress = true;
           bw.WorkerSupportsCancellation = true;
           bw.DoWork += new DoWorkEventHandler(bw_DoWork);
           bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
           bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);

       }
 onstartButtonClick()
 {
   Thread readerThread = new Thread(new ThreadStart(readData));
   readerThread.Start();
   Thread writerThread = new Thread(new ThreadStart(writeData));
   writerThread.Start();
   writerThread.Join();
   readerThread.Join();
 }
 readData()
 {
   while (length > 0)
   {
    data = br.ReadBytes(data.Length);
    Buffer.putData(data);
    length = length - data.Length;
    Console.WriteLine("Reading {0}", data.Length);
    bw.ReportProgress(10);
   }
    Buffer.STOP = false;
    Buffer._reset.Set();
 }
private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
       {
           this.BeginInvoke(new Action(() =>
           {
               Console.WriteLine("Inside Begin Invoke");
               progressBar1.Value = e.ProgressPercentage;
               Application.DoEvents();
           }));

       }
 public void writeData()
 {
    while (Buffer.STOP)
   {
     if (Buffer.STOP != false)
     {
          Buffer._reset.WaitOne();
          byte[] data = Buffer.takeData();
          if (data != null && Buffer.STOP == true)
          {
            fs.Write(data, 0, data.Length);
            fs.Flush();
          }
          Console.WriteLine("Writing to file :" + data.Length);
          Buffer._reset.Reset();
       }
   }
  }
}
 static class Buffer
   {
       public static  byte[] _data = new byte[10240];
       public static AutoResetEvent _reset = new AutoResetEvent(false);
       private static bool _isStop = true;

       public static bool STOP
       {
           get
           {
               return _isStop;
           }
           set
           {
               _isStop = value;
           }
       }
       public static void putData(byte[] data)
       {
           _data = data;
           Console.WriteLine("Data Length :" + data.Length);
           _reset.Set();
      }
       public static byte[] takeData()
       {
           return _data;
       }
   }

Progress is updated at end of operation.
Can you please suggest solution??

解决方案

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