Question

如何在Silverlight 3中实现MultiBinding？

Answer 1

这是一种工作方式略有不同：http://www.olsonsoft.com/blogs/stefanolson/post/Improvements-to-Silverlight-Multi-binding-support.aspx 它允许你编写这样的代码：

<TextBlock x:Name="Block" Foreground="White" FontSize="13"
           Margin="5,0,0,0">
    <local:BindingUtil.MultiBindings>
        <local:MultiBindings>
            <local:MultiBinding TargetProperty="Text" Converter="{StaticResource TitleConverter}">
                <Binding Path="Surname"/>                            
                <Binding Path="Forename"/>
            </local:MultiBinding>
            <local:MultiBinding TargetProperty="Visibility" Converter="{StaticResource TitleToVisibiltyConverter}">
                <Binding Path="Surname"/>                            
                <Binding Path="Forename"/>
            </local:MultiBinding>
        </local:MultiBindings>
    </local:BindingUtil.MultiBindings>
</TextBlock>

通常我不喜欢链接到人们的博客，但代码太大而无法发布。

Answer 2

这是一个允许最多5个绑定的实现：http://www.thejoyofcode.com/MultiBinding_for_Silverlight_3.aspx 它允许你编写这样的代码：

<binding:MultiBinding x:Name="mb" Converter="{StaticResource intsToBrushConverter}"
    NumberOfInputs="3"
    Input1="{Binding ElementName=red, Path=Value, Mode=TwoWay}"
    Input2="{Binding ElementName=green, Path=Value, Mode=TwoWay}"
    Input3="{Binding ElementName=blue, Path=Value, Mode=TwoWay}" />

<Border Background="{Binding ElementName=mb, Path=Output}" Margin="5"/>

Silverlight 3中的MultiBinding

2 个答案: