为什么一段时间后应用程序冻结？

Question

我正在制作SCADA屏幕（c＃wpf）。我有很多动画/文本框和标签更改等。但是主要问题是关于我的图表（Winform图表）。我必须每2秒更新一次（它有8行）。因此，一段时间后，它会使ui线程无响应。

对于更快的UI线程我该怎么做？

private static BackgroundWorker backgroundWorker; 
private void window_Loaded(object sender, RoutedEventArgs e)
{
            backgroundWorker = new BackgroundWorker
            {
                WorkerReportsProgress = true,
                WorkerSupportsCancellation = true
            };

            backgroundWorker.DoWork += backgroundWorker_DoWork;   
            backgroundWorker.ProgressChanged += backgroundWorker_ProgressChanged;   
            backgroundWorker.RunWorkerCompleted += backgroundWorker_RunWorkerCompleted;
            backgroundWorker.RunWorkerAsync();
}

    private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        int i = 0;


        while (counter >= 1)
        {
            i++;

            //CHECK FOR CANCELLATION FIRST
            if (backgroundWorker.CancellationPending)
            {
                //CANCEL
                e.Cancel = true;
            }
            else
            {
                simulateHeavyJob();
                backgroundWorker.ReportProgress(i);
            }
        }
    } 
private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e){            
 Random x = new Random();
        int ajn = x.Next(0, 100);
        if (Randıman0.active)
        {

            cpuChart.Series[Makineler[0].isim].Points.AddXY(DateTime.Now, ajn-5);

            if (cpuChart.Series[Makineler[0].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[0].isim].Points.RemoveAt(0);

        }
        if (Randıman1.active)
        {
            cpuChart.Series[Makineler[1].isim].Points.AddXY(DateTime.Now, ajn+5); 

            if (cpuChart.Series[Makineler[1].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[1].isim].Points.RemoveAt(0);

        }

        if (Randıman2.active)
        {
            cpuChart.Series[Makineler[2].isim].Points.AddXY(DateTime.Now, ajn+10);

            if (cpuChart.Series[Makineler[2].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[2].isim].Points.RemoveAt(0);

        }

        if (Randıman3.active)
        {
            cpuChart.Series[Makineler[3].isim].Points.AddXY(DateTime.Now, ajn-10);

            if (cpuChart.Series[Makineler[3].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[3].isim].Points.RemoveAt(0);

        }

        if (Randıman4.active)
        {
            cpuChart.Series[Makineler[4].isim].Points.AddXY(DateTime.Now, ajn+20);

            if (cpuChart.Series[Makineler[4].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[4].isim].Points.RemoveAt(0);

        }

        if (Randıman5.active)
        {
            cpuChart.Series[Makineler[5].isim].Points.AddXY(DateTime.Now, ajn-20);

            if (cpuChart.Series[Makineler[5].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[5].isim].Points.RemoveAt(0);

        }

        if (Randıman6.active)
        {
            cpuChart.Series[Makineler[6].isim].Points.AddXY(DateTime.Now, ajn+15);

            if (cpuChart.Series[Makineler[6].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[6].isim].Points.RemoveAt(0);

        }

        if (Randıman7.active)
        {
            cpuChart.Series[Makineler[7].isim].Points.AddXY(DateTime.Now, ajn-15);

            if (cpuChart.Series[Makineler[7].isim].Points.Count > 1800)
                cpuChart.Series[Makineler[7].isim].Points.RemoveAt(0);

        }


    }
    private void simulateHeavyJob()
    {
        Thread.Sleep(2000);

    }

    private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        if (e.Cancelled)
        {
            /*
            display("You have Cancelled");*/
        }
        else
        {
           // display("Work completed successfully");
        }
    }

我的图表每隔一分钟也向左滑动一次：

 Dispatcher.Invoke(() => { cpuChart.ChartAreas[0].AxisX.Minimum = minDate.ToOADate(); });
 Dispatcher.Invoke(() => { cpuChart.ChartAreas[0].AxisX.Maximum = maxDate.ToOADate(); });