带进度条的文件复制

您需要这样的东西：

    public delegate void ProgressChangeDelegate(double Persentage, ref bool Cancel);    public delegate void Completedelegate();    class CustomFileCopier    {        public CustomFileCopier(string Source, string Dest)        { this.SourceFilePath = Source; this.DestFilePath = Dest; onProgressChanged += delegate { }; onComplete += delegate { };        }        public void Copy()        { byte[] buffer = new byte[1024 * 1024]; // 1MB buffer bool cancelFlag = false; using (FileStream source = new FileStream(SourceFilePath, FileMode.Open, FileAccess.Read)) {     long fileLength = source.Length;     using (FileStream dest = new FileStream(DestFilePath, FileMode.CreateNew, FileAccess.Write))     {         long totalBytes = 0;         int currentBlockSize = 0;         while ((currentBlockSize = source.Read(buffer, 0, buffer.Length)) > 0)         {  totalBytes += currentBlockSize;  double persentage = (double)totalBytes * 100.0 / fileLength;  dest.Write(buffer, 0, currentBlockSize);  cancelFlag = false;  onProgressChanged(persentage, ref cancelFlag);  if (cancelFlag == true)  {      // Delete dest file here      break;  }         }     } } onComplete();        }        public string SourceFilePath { get; set; }        public string DestFilePath { get; set; }        public event ProgressChangeDelegate OnProgressChanged;        public event Completedelegate OnComplete;    }

只需在单独的线程中运行它并订阅

OnProgressChanged