Question

我想合并2个大文件但atm我的代码只更新了1个文件被复制后的进度是否有更好的方法来报告进度这是我的复制代码atm

 max = files.Count;
 MessageBox.Show("Merge Started");
 using (Stream output = File.OpenWrite(dest))
   {
      foreach (string inputFile in files)
        {
          using (Stream input = File.OpenRead(inputFile))
            {
              input.CopyTo(output);
              count++;
              progress = count * 100 / max;
              backgroundWorker2.ReportProgress(Convert.ToInt32(progress));
            }
        }
  }
MessageBox.Show("Merge Complete");

Answer 1

您可以以块的形式阅读该文件。

您应该通知BackgroundWorker。

using (Stream output = File.OpenWrite(dest))
{
    foreach (string inputFile in files)
    {
        using (Stream input = File.OpenRead(inputFile))
        {
            byte[] buffer = new byte[16 * 1024];

            int read;
            while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
            {
                output.Write(buffer, 0, read);

                // report progress back
                progress = (count / max + read / buffer.Length /* part of this file */) *  100;
                backgroundWorker2.ReportProgress(Convert.ToInt32(progress));
            }

            count++;
            progress = count * 100 / max;
            backgroundWorker2.ReportProgress(Convert.ToInt32(progress));
        }
    }
}

Answer 2

这是我最终使用感谢patrick帮助了很多的代码

            List<string> files = new List<string>();
            if (file1 != null && file2 != null)
            {
                files.Add(file1);
                files.Add(file2);
            }
            if (file3 != null)
            {
                files.Add(file3);
            }
            if (file4 != null)
            {
                files.Add(file4);
            }
                    max = files.Count;
                    MessageBox.Show("Merge Started");
                    using (Stream output = File.OpenWrite(dest))
                    {
                        foreach (string inputFile in files)
                        {
                            using (Stream input = File.OpenRead(inputFile))
                            {
                                byte[] buffer = new byte[32 * 1024];
                                int read;
                                while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
                                {
                                    output.Write(buffer, 0, read);
                                    count++;
                                    // report progress back
                                    progress = count * 100 / read;
                                    backgroundWorker2.ReportProgress(Convert.ToInt32(progress));
                                }
                            }
                        }
                    }
                    MessageBox.Show("Merge Complete");

stream.copyto与进度条报告

2 个答案: