c# - 带网格线的 Winrt 自定义网格控件

Question

我想做一个自定义网格控件，因为默认不支持显示网格线。我为此找到了一个 wpf 解决方案，但 winrt 缺少 wpf 支持的一些功能。 wpf 解决方案中的代码是这样的:

     protected override void OnRender(DrawingContext dc)
    {
        if (ShowCustomGridLines)
        {
            foreach (var rowDefinition in RowDefinitions)
            {
                dc.DrawLine(new Pen(GridLineBrush, GridLineThickness), new Point(0, rowDefinition.Offset), new Point(ActualWidth, rowDefinition.Offset));
            }

            foreach (var columnDefinition in ColumnDefinitions)
            {
                dc.DrawLine(new Pen(GridLineBrush, GridLineThickness), new Point(columnDefinition.Offset, 0), new Point(columnDefinition.Offset, ActualHeight));
            }
            dc.DrawRectangle(Brushes.Transparent, new Pen(GridLineBrush, GridLineThickness), new Rect(0, 0, ActualWidth, ActualHeight));
        }
        base.OnRender(dc);
    }

但是我不能重写onrender方法，winrt中也没有drawingcontext。那么如何将网格线绘制到我的网格中呢？感谢您的帮助!

Answer 1

如果您不想在每个元素周围放置边框，我所做的基本上就是您所做的，但在 xaml 中基本上只是绘制它们，例如；

<Border BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="20"/>    
            <RowDefinition Height="20"/>
            <RowDefinition Height="20"/>
            <RowDefinition Height="20"/>
            <RowDefinition Height="20"/>        
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="20"/>
            <ColumnDefinition Width="20"/>
            <ColumnDefinition Width="20"/>
            <ColumnDefinition Width="20"/>
            <ColumnDefinition Width="20"/>
        </Grid.ColumnDefinitions>
        <!-- Horizontal Lines -->
        <Rectangle Grid.ColumnSpan="5" Height="1" VerticalAlignment="Bottom" Fill="Black"/>
        <Rectangle Grid.Row="1" Grid.ColumnSpan="5" Height="1" VerticalAlignment="Bottom" Fill="Black"/>
        <Rectangle Grid.Row="2" Grid.ColumnSpan="5" Height="1" VerticalAlignment="Bottom" Fill="Black"/>
        <Rectangle Grid.Row="3" Grid.ColumnSpan="5" Height="1" VerticalAlignment="Bottom" Fill="Black"/>
        <Rectangle Grid.Row="4" Grid.ColumnSpan="5" Height="1" VerticalAlignment="Bottom" Fill="Black"/>
        <!-- Vertical Lines -->
        <Rectangle Grid.RowSpan="5" Width="1" HorizontalAlignment="Right" Fill="Black"/>
        <Rectangle Grid.Column="1" Grid.RowSpan="5" Width="1" HorizontalAlignment="Right" Fill="Black"/>
        <Rectangle Grid.Column="2" Grid.RowSpan="5" Width="1" HorizontalAlignment="Right" Fill="Black"/>
        <Rectangle Grid.Column="3" Grid.RowSpan="5" Width="1" HorizontalAlignment="Right" Fill="Black"/>
    </Grid>
</Border>

通过这种方式，您可以按照自己喜欢的方式排列单元格，并且可以减少必须将所有内容嵌套在边框中的情况。希望能帮助到你。干杯!