[WPF] Binding RelativeSource, ElementName

CommandParameter Binding 시 ElementName 사용 예시

 

 

Command Binding 시 RelativeSource 사용 예시

<dxmvvm:Interaction.Behaviors>
    <dxmvvm:EventToCommand EventName="ItemClick"
                   Command="{Binding DataContext.ItemClickCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
                   PassEventArgsToCommand="True"/>
</dxmvvm:Interaction.Behaviors>

 

한 단계 위의 UserControl소스의 DataContext의 ItemClickCommand에 바인딩.

 

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■ Binding 태그 확장의 RelativeSource 속성을 사용하는 방법을 보여준다.

 

▶ TextBlock 자신이 바인딩 소스인 경우 (C#)

<TextBlock Text="{Binding RelativeSource={RelativeSource self}, Path=FontFamily}" />

여기서 self는 <TextBlock>

TextBlock의 DataContext를 접근하려는 경우는

<TextBlock Text="{Binding RelativeSource={RelativeSource self}, Path=DataContext.PropertyName}" />

이런 식으로 DataContext.프로퍼티네임 으로 접근

▶ TextBlock 기준 1단계 위의 StackPanel이 바인딩 소스인 경우 (C#)

<StackPanel TextBlock.FontSize="12" >
    <StackPanel
        HorizontalAlignment="Center"
        Orientation="Horizontal">
        <TextBlock Text="This TextBlock is inside a StackPanel with " />
        <TextBlock Text= "{Binding RelativeSource={RelativeSource AncestorType={x:Type StackPanel}}, Path=Orientation}" />
        <TextBlock Text=" orientation" />
    </StackPanel>
</StackPanel>

 

▶ TextBlock 기준 2단계 위의 StackPanel이 바인딩 소스인 경우 (C#)

<StackPanel TextBlock.FontSize="12" >
    <StackPanel
        HorizontalAlignment="Center"
        Orientation="Horizontal">
        <TextBlock Text="The parent StackPanel has " />
        <TextBlock Text= "{Binding RelativeSource={RelativeSource AncestorType={x:Type StackPanel}, AncestorLevel=2}, Path=Orientation}" />
        <TextBlock Text=" orientation" />
    </StackPanel>
</StackPanel>

 

▶ ControlTemplate 정의 엘리먼트가 바인딩 소스인 경우 (C#)

<ControlTemplate TargetType="{x:Type Button}">
    <Border
        x:Name="_pBorder"
        BorderThickness="2"
        BorderBrush="Black"
        CornerRadius="20">
        <Border.Background>
            <LinearGradientBrush
                StartPoint="0 0.5"
                EndPoint="1 0.5">
                <GradientStop Offset="0.0" Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Background.Color}" />
                <GradientStop Offset="0.9" Color="White" />
            </LinearGradientBrush>
        </Border.Background>
        <ContentPresenter
            Margin="2"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            RecognizesAccessKey="True" />
    </Border>
</ControlTemplate>

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https://icodebroker.tistory.com/692

[C#/WPF] Binding 태그 확장 : RelativeSource 속성 사용하기

 

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