如何用进度条实时显示数据库备份和还原的进度?

Question

这种东西网上很多
先Google一下吧

Answer 1

 //打开源文件
                    FileInfo fileToOpen = new FileInfo(sourceFileName);                    //保存到目标文件
                    FileInfo fileToSave = new FileInfo(destFileName);                    //读源文件
                    FileStream streamToRead = fileToOpen.Open(FileMode.Open, FileAccess.Read, FileShare.Read);                    //打开目标文件
                    FileStream streamToWrite = fileToSave.OpenWrite();
                    //设置正常一次读取的字节数
                    int bufferSize = 4096;                    //设置正常写文件时的字节数组
                    byte[] bufferNormal = new byte[bufferSize];
                    //总共写文件的次数
                    long readTimes = streamToRead.Length / bufferSize;                    //正常写文件N次后剩余的字节数目
                    int remainderSize = Convert.ToInt32(streamToRead.Length % bufferSize);                    //设置剩余写文件时的字节数组
                    byte[] bufferRemainder = new byte[remainderSize];
                    //循环写数据到目标文件中
                    for (long i = 0; i <= readTimes; i++)
                    {
                        //读源文件
                        streamToRead.Read(bufferNormal, 0, bufferSize);                        //写数据到目标文件
                        streamToWrite.Write(bufferNormal, 0, bufferSize);                        //s设置进度条的值
                        ProgressBar.Value = Convert.ToInt32(i * 100 / readTimes);
                        Application.DoEvents();                        //设置Lable上的进度值
                        lblProgress.Text = ProgressBar.Value.ToString() + "%";
                    }                    //剩余字节的读和写
                    if (remainderSize != 0)
                    {
                        streamToRead.Read(bufferRemainder, 0, remainderSize);
                        streamToWrite.Write(bufferRemainder, 0, remainderSize);
                    }                    //关闭文件的读写
                    streamToRead.Close();
                    streamToWrite.Close();
这个是真的，绝对实时