MultiBinding

<StackPanel>
    <Slider x:Name="sl1" Minimum="10" Maximum="100"/>
    <Slider x:Name="sl2" Minimum="10" Maximum="100"/>
    <Label x:Name="label13" Background="Yellow" Foreground="Black">
        <Label.Content>
            <TextBlock>
                <TextBlock.Text>
                    <MultiBinding StringFormat="{}This is {0:N2} x {1:N2}">
                        <Binding ElementName="sl1" Path="Value" />
                        <Binding ElementName="sl2" Path="Value" />
                    </MultiBinding>
                </TextBlock.Text>
            </TextBlock>
        </Label.Content>
    </Label>
</StackPanel>

在上面的例子中，移动滑块，Label的两个值对应发生变化
用占位符把两个滑块的值拼接在一起
通过:N2来保留两位小数

示例代码

https://github.com/zLulus/NotePractice/tree/dev3/WPF/WpfDemo/MultiBinding