private void btnUpdate_Click(object sender, EventArgs e)
{
bgWorker.RunWorkerAsync();
}
private void bgWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackUpDatabase.BackUp(this.txtPath.Text);
for (int i = 0; i <= 100; i++)
{
// Report progress to 'UI' thread
bgWorker.ReportProgress(i);
// Simulate long task
System.Threading.Thread.Sleep(100);
}
}
private void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressBar1.Value = e.ProgressPercentage;
lblProgress.Text = String.Format("Progress: {0} %", e.ProgressPercentage);
}
代码正在运行,但我怀疑进度不是确切的时间过程。我在这里错过了什么吗?
答案 0 :(得分:0)
你的问题有点模糊,不过不好给它一个裂缝:
听起来我需要两个后台工作人员,一个用于实际备份,另一个用于实时报告时间。
幸运的是,有一个在后台线程中运行的计时器! System.Timers.Timer。
您已经有一个线程设置来完成工作,所以您只需创建计时器,然后启动/更新/停止它。
下面是代码如何工作:
private Timer _Timer;
private DateTime _Start;
private void InitTimer()
{
_Start = DateTime.Now;
_Timer = new Timer(100);
_Timer.AutoReset = false;
_Timer.Elapsed += new ElapsedEventHandler(Timer_Elapsed);
_Timer.Start();
}
private void Timer_Elapsed(object sender, ElapsedEventArgs e)
{
TimeSpan diff = DateTime.Now - _Start;
this.Invoke(new MethodInvoker(delegate()
{
lblProgress.Text = String.Format("Time: {0}", diff);
}));
}
//starts the worker thread
private void btnUpdate_Click(object sender, EventArgs e)
{
InitTimer();
bgWorker.RunWorkerAsync();
}
//Does the backup
private void bgWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackUpDatabase.BackUp(this.txtPath.Text);
}
//Stops the timer when the backup finishes
private void bgWorker_WorkCompleted(object sender, RunWorkerCompletedEventArgs e)
{
_Timer.Stop();
}
我还没有测试过这段代码,我可能会以此为基础:)但请尽情享受:)
编辑:
考虑一下这个问题,如果OP希望获得百分比,他需要将备份分解为步骤并手动报告。