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在項目的列表框中,可以將一個項目指定爲主項目。在模板中,我有一個綁定到參數化命令的按鈕(集合中的特定項目是傳遞給datacontext中的命令的參數),僅當項目當前不是主項目時纔可見。如果項目是主項目,我想顯示一個靜態圖像。由於我無法將圖像綁定到命令以綁定按鈕,我想我可以將圖像的Visibility屬性綁定到按鈕的Visibility屬性的「反向」。 (即當按鈕是可見的,圖像是隱藏的,反之亦然。)但我無法弄清楚如何做到這一點。該按鈕是模板內網格內圖像的同胞。這裏是我的模板......如何綁定到兄弟控件的屬性?
<DataTemplate>
<StackPanel Orientation="Vertical">
<Grid>
<Grid.ColumnDefinitions>
...
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Path=FormattedNumber}" Style="{StaticResource FieldDataTextBlock}" FontWeight="Bold" />
<!-- How can I make this image aware of the following button's state? -->
<Image Grid.Column="2" Source="/Resources/Star.Pressed.png" Visibility="{Binding RelativeSource={RelativeSource AncestorType=Grid}, Path={}}" Width="20" Height="20" />
<Button Grid.Column="2" x:Name="btnMakePrimary" Style="{StaticResource StarButton}" Command="{Binding ElementName=lstPhoneNumbers, Path=DataContext.MakePrimaryPhoneNumberCommand}" CommandParameter="{Binding}" ToolTip="Set as display number." Visibility="{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Converter={StaticResource BoolVisibility}}" />
<Button Grid.Column="4" Style="{StaticResource DetailsButton}" Command="{Binding ElementName=lstPhoneNumbers, Path=DataContext.ViewPhoneNumberCommand}" CommandParameter="{Binding}" />
<Button Grid.Column="6" Style="{StaticResource DeleteButton}" Command="{Binding ElementName=lstPhoneNumbers, Path=DataContext.DeletePhoneNumberCommand}" CommandParameter="{Binding}" />
</Grid>
<Grid >
<Grid.ColumnDefinitions>
...
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="{Binding Path=PhoneTypeString}" Style="{StaticResource FieldDataTextBlock}" />
<TextBlock Grid.Column="2" Text="(notes)" Foreground="Blue" ToolTip="{Binding Path=PhoneNumberNote}" Visibility="{Binding Path=HasNote, Converter={StaticResource BoolVisibility}}" />
</Grid>
</StackPanel>
</DataTemplate>
要麼,或有將圖像綁定到,需要一個參數父的datacontext的方法呢?
謝謝。
Ĵ