Windows phone 8.1 listView复选框位置

Question

我有一个带有图像的ListView。Looks like this

在显示用于选择这些图像的复选框时，这些复选框与顶部对齐。但我想将复选框对齐图像的中心To be like this 如何在listview中对齐复选框？

<ListView Name="myList" ItemsSource="{Binding PetrolCompany}">
                <ListView.ItemTemplate>
                    <DataTemplate>
                        <Button BorderThickness="1">
                            <Grid VerticalAlignment="Center" Height="100">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="3*"/>
                                    <RowDefinition Height="*"/>
                                </Grid.RowDefinitions>
                                <Image Source="{Binding ImageSourse}"/>
                                <TextBlock Text="{Binding CompanyName}"/>
                            </Grid>
                        </Button>
                    </DataTemplate>
                </ListView.ItemTemplate>
            </ListView>