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我正在为一页中的两张底纸（BS）而苦苦挣扎。在第一个上，我想从 ListView 中选择（点击）带有名称和编号的项目，单击它后 BS1 将隐藏，BS2 将在同一个地方查看，带有两个标签（我选择的名称和编号）。

我应该在哪里写这个逻辑？在 MainPage.cs 中还是在 BottomSheet1.cs 和 BottomSheet2.cs 中？或者，也许你有其他想法？

我正在使用的 BottomSheet：http: //xamaringuyshow.com/2020/06/21/xamarin-forms-bottom-slider/

主页.xaml

<Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
        </Grid.RowDefinitions>
        <maps:Map x:Name="map" BackgroundColor="Gray" HorizontalOptions="Fill" VerticalOptions="Fill" Grid.Row="0" Grid.RowSpan="4"/>
        <local:BottomSheet1 x:Name="BottomSheetPanCakeLocal" VerticalOptions="EndAndExpand"  Grid.Row="1" Grid.RowSpan="3"></local:BottomSheetPanCake>
        <local:BottomSheet2 x:Name="BottomSheetUnitPanCakeLocal" Grid.Row="1" Grid.RowSpan="3"  VerticalOptions="EndAndExpand"></local:BottomSheetUnitPanCake>
    </Grid>
</ContentPage>

BottomSheet1.xaml

<RelativeLayout>
<Grid>
<ListView x:Name="UnitList" ItemsSource="{Binding Units}" RowHeight="60" ItemTapped="UnitList_ItemTapped" >                                
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                      <StackLayout>
                        <Grid>
                          <Grid.RowDefinitions>
                             <RowDefinition Height="*"></RowDefinition>
                                   <RowDefinition Height="*"></RowDefinition>
                                  </Grid.RowDefinitions>
                                   <Grid.ColumnDefinitions>
                                   <ColumnDefinition Width="80*" ></ColumnDefinition>
                                      <ColumnDefinition Width="20*"></ColumnDefinition>
                                        </Grid.ColumnDefinitions>

                                  <Label Text="{Binding name}" Grid.Row="0" Grid.Column="0" Margin="15, 10, 0, 0" Style="{StaticResource HighlightedTextsFont}" FontAttributes="Bold"></Label>
                                  <Label Text="{Binding number}" Grid.Row="1" Grid.Column="0" Margin="15, -3 ,0 ,12" Style="{StaticResource secondaryHeader}" ></Label>
                                  <Label Text=">" Grid.RowSpan="2" Grid.Column="1" HorizontalOptions="End" VerticalOptions="Center" TextColor="Gray" Padding="15"></Label>
                                                </Grid>
                                            </StackLayout>
                                        </ViewCell>
                                    </DataTemplate>
                                </ListView.ItemTemplate>
                            </ListView>
</Grid>
</RelativeLayout>

BottomSheet2.xaml

<RelativeLayout>
<Grid>
 <Label Text="{Binding name}" Grid.Row="0" Grid.Column="0" Style="{StaticResource mainHeader}" ></Label>
 <Label Text="{Binding number}" Grid.Row="1" Grid.Column="0" Style="{StaticResource secondaryHeader}" ></Label>
</Grid>
</RelativeLayout>
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