如何以xamarin形式绑定boxview高度？

Question

我试图在listview（带有列的模板）中使用boxview控件绘制类似小条形图的东西。因此，在每个项目的一列中，我想绘制具有可变高度的boxview（取决于变量值）

这样的事情：

<ListView x:Name="lstView" RowHeight="75">
                      <ListView.ItemTemplate>
                              <DataTemplate>

                                 <ViewCell >
                                    <Grid RowSpacing="0">
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="*" />
                                            <RowDefinition Height="*" />
                                        </Grid.RowDefinitions>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="*" />
                                            <ColumnDefinition Width="*" />
                                         </Grid.ColumnDefinitions>

                                            <Label Text="{Binding Local}"  VerticalTextAlignment="End" HorizontalTextAlignment="Center" Grid.Row="0" Grid.Column="1" FontSize="10" TextColor="Navy" />
                                            <Label Text="Empate" Grid.Row="0" VerticalTextAlignment="End" HorizontalTextAlignment="Center" Grid.Column="3"  FontSize="10" TextColor="Navy"/>
                                            <Label Text="{Binding Visitante}" VerticalTextAlignment="End" HorizontalTextAlignment="Center" Grid.Row="0" Grid.Column="5" FontSize="10" TextColor="Navy"/>
                                            **<BoxView Grid.Row="0" Grid.Column="5" HeightRequest="{Binding PctLocal}" WidthRequest="15"/>;**
                                            <Label Text="{Binding PctEmpate}" VerticalTextAlignment="End" HorizontalTextAlignment="Center"   Grid.Row="0" Grid.Column="2" FontSize="10" />
                                            <Label Text="{Binding PctVisitante}" VerticalTextAlignment="End" HorizontalTextAlignment="Center"   Grid.Row="0" Grid.Column="4" FontSize="10" />
                                            <Label Text="{Binding LocalSupporters}" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Grid.ColumnSpan="2"  Grid.Row="1" Grid.Column="0" FontSize="10" />
                                            <Label Text="{Binding DrawSupporters}" VerticalTextAlignment="Center" HorizontalTextAlignment="Center"  Grid.Row="1" Grid.Column="2" Grid.ColumnSpan="2" FontSize="10" />
                                            <Label Text="{Binding AwaySupporters}" VerticalTextAlignment="Center" HorizontalTextAlignment="Center" Grid.Row="1" Grid.Column="4" Grid.ColumnSpan="2" FontSize="10" />
                                    </Grid>
                                </ViewCell>
                              </DataTemplate>
                        </ListView.ItemTemplate>
                </ListView>

我怎样才能做到这一点？