Question

我正在尝试在程序中添加进度条。

FileLoadPB.Maximum = mainClass.values.realXPos.Count;
for (int i = 0; i < mainClass.values.realXPos.Count; ++i)
{
    FileLoadPB.Value += i;
    ComponentList.Items.Add(new MappedPoint { pointNum = i + 1, xPoint = mainClass.values.realXPos[i], yPoint = mainClass.values.realYPos[i] });
}

每次将对象添加到ListView时，我希望FileLoadPB进度条按“i”递增。这可行，但它实际上并没有显示栏的进展。它只在循环开始时显示为空，完整和结束。我已经在BackgroundWorker上阅读了一些内容，但是我不确定如何实现它。

Answer 1

以下代码只是一个假人来说明如何使用BackgroundWorker。希望它有所帮助

public partial class MainWindow : Window {
    BackgroundWorker backgroundWorker = new BackgroundWorker();
    List<int> listDummy = new List<int>();

    public MainWindow() {
        InitializeComponent();

        backgroundWorker.WorkerReportsProgress = true;
        backgroundWorker.ProgressChanged += backgroundWorker_ProgressChanged;
        backgroundWorker.DoWork += backgroundWorker_DoWork;
    }

    void backgroundWorker_DoWork(object sender, DoWorkEventArgs e) {
        var numberOfItems = 111;
        for (int i = 0; i < numberOfItems; i++) {
            listDummy.Add(i);
            Thread.Sleep(500);

            backgroundWorker.ReportProgress(Convert.ToInt32((double)i / numberOfItems * 100));
        }
    }

    void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) {
        progressBar1.Value = e.ProgressPercentage;
    }

    private void Button_Click(object sender, RoutedEventArgs e) {
        backgroundWorker.RunWorkerAsync();
    }
}

添加进度条C＃WPF

1 个答案: