WPF的进度条和百分比显示不一致

Question

        private void Copy_Click(object sender, RoutedEventArgs e)
        {
            //显示进度条的进度
            System.IO.FileStream SourceFile = new FileStream("MP3.txt", FileMode.Open, FileAccess.Read, FileShare.None);
            System.IO.FileStream DestFile = new FileStream("xswby.txt",FileMode.Append,FileAccess.Write,FileShare.None);
            byte[] buffer = new byte[2] ;
            progressBar1.Maximum = (int)SourceFile.Length/2;
            progressBar1.Minimum = 0;
            while (true)
            {
                int read = SourceFile.Read(buffer,0,buffer.Length);
                if (read <= 0)
                {
                    break;
                }
                DestFile.Write(buffer , 0 ,buffer.Length);
                progressBar1.Value++;
                label1.Content = progressBar1.Value.ToString()+"%";
            }
            //this.Close();
        }注：mp3的文件有120个字节。还有就是百分比重视显示60%，感觉好像是读了60次，所以才变成这样，但是进度条已经满了

Answer 1

怎么没人啊，不过我已经解决了！！！