如何在UWP中设置automatic ScrollViewer down

Question

我正在做一个使用数据网格控件的UWP数据绑定技术的任务。但问题出在ScrollViewer上。我希望ScrollViewer在数据网格中添加任何新项目时自动向下滚动，最后索引数据网格列表应在底部显示新项目。

请在下面找到我已共享的快照：

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代码：

<controls:DataGrid x:Name="dgNewBill" RowBackgroundEvenBrush="Black" RowBackgroundOddBrush="Black" ItemsSource="{Binding objStockIssueItemList}" VerticalAlignment="Stretch" Height="478" SelectionMode="Single" TabNavigation="Local" HeaderBackground="Black" Background="Black" BorderThickness="1" BorderBrush="Gray" Grid.Row="2" Grid.ColumnSpan="12" Margin="0,0,0,0" Loading="dgNewBill_Loading" TabIndex="2" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollMode="Auto" KeyUp="dgNewBill_KeyUp" DoubleTapped="dgNewBill_DoubleTapped"> 
</controls:DataGrid>

Answer 1

Xaml：

<ScrollViewer x:Name="ScrollViewer" Width="400" Height="400" Background="LightGray">
    <StackPanel x:Name="StackPanel" SizeChanged="StackPanel_OnSizeChanged"/>
</ScrollViewer>

代码隐藏：

    private async void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
        for (int i = 0; i < 40; i++)
        {
            StackPanel.Children.Add(new TextBlock
            {
                Text = $"Item {i}",
                FontSize = 40
            });

            await Task.Delay(500);
        }
    }

    private void StackPanel_OnSizeChanged(object sender, SizeChangedEventArgs e)
    {
        ScrollViewer.ChangeView(0, ScrollViewer.ScrollableHeight, 1);
    }

看：

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