0

我在 viewmodel 中有这样的属性:

public class TestObject
{
    public Color Color { get; set; }
    public IList<Items> { get; set; }
    ...
}

视图中的列表框如下:

<ListBox ItemsSource="{Binding TestObject.Items}" ....

和这样的列表框样式:

<Style TargetType="ListBoxItem">
           ...
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Border x:Name="LayoutRoot" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="SelectionStates">
                                    <VisualState x:Name="Unselected"/>
                                    <VisualState x:Name="Selected">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentContainer" Storyboard.TargetProperty="Foreground" Duration="0">
                                                <DiscreteObjectKeyFrame  KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <SolidColorBrush Color="{**Binding to TestObject.Color ???}**" />
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="Border" Storyboard.TargetProperty="Background" Duration="0">
                                                <DiscreteObjectKeyFrame  KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        <SolidColorBrush Color="{**Binding to TestObject.Color ???}**"/>
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>

...

所以请...我如何绑定 ItemsSource 绑定?

4

1 回答 1

0

我不确定你问题的控制风格部分......但通常如果我想绑定到当前项目之外的东西,那么我会使用一个ElementName技巧来使其工作 - 例如

 <Grid Name='RootLayout'>
     <ListBox ItemsSource='{Binding Items}'>
          <ListBox.ItemTemplate>
               <DataTemplate>
                    <TextBlock Text="{Binding Title}" Foreground="{Binding DataContext.PriorityColor, ElementName=RootLayout}" />
               </DataTemplate>
          </ListBox.ItemTemplate>
     </ListBox>
 </Grid>

我通常也不会将 Color 直接包含在我的 ViewModel 中,而是使用如下转换器:

 <TextBlock Text="{Binding Title}" Foreground="{Binding DataContext.Priority, ElementName=RootLayout, Converter={StaticResource PriorityToColorConverter}}" />

如果您正在执行跨平台视图模型,这将特别有用 - 因为颜色和画笔类不会在 WP7 和 WinRT 之间共享,更不用说在 MonoTouch 和 MonoDroid 之间共享了。

于 2012-07-27T09:50:18.397 回答