我在数据模板中有带复选框的组合框。组合框ItemSource属性与ViewModel中的集合绑定。我想选中一个特定的复选框作为默认复选框。我该怎么做?
<ComboBox Grid.Column="1"
ItemsSource="{Binding MyCollection, Mode=OneWay}"
Style="{StaticResource MyComboboxStyle}"
Margin="5"
MinWidth="120">
<ComboBox.ItemTemplate>
<DataTemplate>
<CheckBox Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=UserControl}, Path=DataContext.MyCheckedCommand}"
CommandParameter="{Binding RelativeSource={RelativeSource Self}}"
Content="{Binding}"
IsChecked="false"
VerticalAlignment="Center"
Margin="3"/>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
我会在视图模型中创建一个布尔属性,然后在加载集合时,在集合中找到应该检查的对象,并将其设置为true。
public bool IsChecked { get; set; }
XAML:
<CheckBox Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=UserControl}, Path=DataContext.MyCheckedCommand}"
CommandParameter="{Binding RelativeSource={RelativeSource Self}}"
Content="{Binding}"
IsChecked="{Binding IsChecked}"
VerticalAlignment="Center"
Margin="3"/>
然而,这可能需要您将此属性与对象模型分开