c# - 如何创建一个当值为 0 时隐藏的 ProgressBar？

Question

以下内容不太有效(ProgressValue 是 DataContext 中设置的值。)

<StatusBarItem Grid.Column="1">
    <StatusBarItem.Resources>
        <Style TargetType="ProgressBar">
            <Style.Triggers>
                <DataTrigger Binding="{Binding ProgressValue}" Value="0">
                    <Setter Property="Visibility" Value="Hidden"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </StatusBarItem.Resources>
    <ProgressBar Value="{Binding ProgressValue}" Grid.Column="1" Width="80" Height="13">
    </ProgressBar>
</StatusBarItem>

Answer 1

尝试在其 ValueChanged 事件中设置 ProgressBar 的 Visibility 属性:

private void progressBar1_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e) {
    progressBar1.Visibility = (progressBar1.Value == 0) ? Visibility.Hidden : Visibility.Visible;
}