这是我的 GridView
<Grid Grid.Column="1" Margin="80,0,0,0">
<Grid.RowDefinitions>
<RowDefinition Height="50" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Text="aktualności" Style="{StaticResource PageSubheader}" />
<local:VariableGridView x:Name="listView" Grid.Row="1" Margin="0,2,0,0" IsItemClickEnabled="True" ItemClick="listView_ItemClick" >
<local:VariableGridView.ItemTemplate>
<DataTemplate>
<Grid>
<Border>
<Image Source="Templates/LightGray.png" Stretch="UniformToFill"/>
</Border>
<StackPanel VerticalAlignment="Top" >
<TextBlock Text="{Binding title}" Height="30" Margin="15,0,15,0"/>
<TextBlock Text="{Binding short}" TextWrapping="NoWrap" Margin="15,0,15,10"/>
</StackPanel>
</Grid>
</DataTemplate>
</local:VariableGridView.ItemTemplate>
<local:VariableGridView.ItemsPanel>
<ItemsPanelTemplate>
<VariableSizedWrapGrid ItemWidth="150" ItemHeight="150" Orientation="Vertical" Margin="0,0,80,0" MaximumRowsOrColumns="3"/>
</ItemsPanelTemplate>
</local:VariableGridView.ItemsPanel>
</local:VariableGridView>
</Grid>
本地类 (VariableGridView) 是用于在 Windows 应用商店中创建视图的小扩展。它工作正常。我不能做一件事。当指针在网格 ITEM 上方时如何更改边框?我找不到它。