使用WPF样式来简化重复的MultiBindings

Question

我正在显示几个测试的结果.每个测试有2个变量,显示结果的文本和颜色随两者而变化.我有这个工作,但有很多重复的MultiBinding正在进行,我想看看有没有办法使用Style来简化XAML.

这是我的代码的简化外观:

//TestResults.cs excerpt
public class TestResults
{
    private Test1Result test1 = new Test1Result();
    public Test1Result Test1 { get { return test1; } }

    private Test2Result test2 = new Test2Result();
    public Test2Result Test2 { get { return test2; } }
}

//TestCtrl.xaml.cs excerpt
public class TestCtrl : UserControl
{
    private TestResults results = new TestResults();
    public TestResults Results { get { return results; } }
}

<!-- TestCtrl.xaml excerpt -->
<UserControl x:Class="Tester.TestCtrl" x:Name="TestResultsCtrl" ...>

<!-- lots of stuff -->

<TextBlock Grid.Row="6">
    <TextBlock.Text>
        <MultiBinding Converter="{StaticResource TestToTextConverter}" >
            <Binding Path="Results.Test1.Temperature" ElementName="TestResultsCtrl" />
            <Binding Path="Results.Test1.Time" ElementName="TestResultsCtrl" />
        </MultiBinding>
    </TextBlock.Text>
    <TextBlock.Foreground>
        <MultiBinding Converter="{StaticResource TestToBrushConverter}">
            <Binding Path="Results.Test1.Temperature" ElementName="TestResultsCtrl" />
            <Binding Path="Results.Test1.Time" ElementName="TestResultsCtrl" />
        </MultiBinding>
    </TextBlock.Foreground>
</TextBlock>

<TextBlock Grid.Row="7">
    <TextBlock.Text>
        <MultiBinding Converter="{StaticResource TestToTextConverter}" >
            <Binding Path="Results.Test2.Temperature" ElementName="TestResultsCtrl" />
            <Binding Path="Results.Test2.Time" ElementName="TestResultsCtrl" />
        </MultiBinding>
    </TextBlock.Text>
    <TextBlock.Foreground>
        <MultiBinding Converter="{StaticResource TestToBrushConverter}">
            <Binding Path="Results.Test2.Temperature" ElementName="TestResultsCtrl" />
            <Binding Path="Results.Test2.Time" ElementName="TestResultsCtrl" />
        </MultiBinding>
    </TextBlock.Foreground>
</TextBlock>

<!-- lots more repetitions here -->

我想定义一个Style,以便我可以更容易地将MultiBindings应用于TextBlocks.每个中唯一的区别是我在Binding Path值中指定的测试.我的目标是:

<Style x:Key="TestResultsStyle" TargetType="{x:Type TextBlock}">
    <!-- do binding stuff here -->
</Style>

<TextBlock Grid.Row="6" 
    Style="{StaticResource TestResultsStyle}" <!--set Test1 path here --> />
<TextBlock Grid.Row="7" 
    Style="{StaticResource TestResultsStyle}" <!--set Test2 path here --> />

这有可能类似吗？

Answer 1

你可以这样做:

<Style x:Key="TestResultsStyle" TargetType="{x:Type TextBlock}">
    <Setter Property="Text">
        <Setter.Value>
            <MultiBinding Converter="{StaticResource TestToTextConverter}" >
                <Binding Path="Temperature" />
                <Binding Path="Time" />
            </MultiBinding>
        </Setter.Value>
    </Setter>
    <!-- Same for Foreground -->
</Style>

<TextBlock Grid.Row="6" 
    DataContext="{Binding ElementName=TestResultsCtrl, Path=Results.Test1}"
    Style="{StaticResource TestResultsStyle}" />
<TextBlock Grid.Row="7" 
    DataContext="{Binding ElementName=TestResultsCtrl, Path=Results.Test2}"
    Style="{StaticResource TestResultsStyle}" />

在这里,您将"Test"作为Style使用的默认绑定上下文传递.