Multibinding WPF - wpf

Question

I am arranging few textblocks in a canvas based on it's locations. sample code snippet is provided below at bottom. For this process I need to access each textblock's Actualwidth and Actual Height inside ItemContainerStyle. I am struggling to access it's properties as below by element name, because it doesn't have a name. How to do it? Do I need to do through templates?
<MultiBinding Converter="{StaticResource BPositionConverter}" ConverterParameter="Left">
<Binding ElementName="TextBlock" Path="ActualHeight" /> <---Problem
<Binding ElementName="TextBlock" Path="ActualWidth" /> <---Problem
</MultiBinding>
--Full snippet
<ItemsControl ItemsSource="{Binding Locations}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="Point">
<TextBlock Text="{Binding}" Width="40" Height="20" />
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemContainerStyle>
<Style TargetType="ContentPresenter">
<Setter Property="Canvas.Left">
<Setter.Value>
<MultiBinding Converter="{StaticResource BPositionConverter}" ConverterParameter="Left">
<Binding ElementName="TextBlock" Path="ActualHeight" /> <---Problem
<Binding ElementName="TextBlock" Path="ActualWidth" /> <---Problem
</MultiBinding>
</Setter.Value>
</Setter>
</Style>
</ItemsControl.ItemContainerStyle>
</ItemsControl>

Answer 1

Since your data template consist of a single text element you can refer to self to get the actual width and height for the same
so remove the ElementName and apply RelativeSource, should work with this trick
<Style TargetType="ContentPresenter">
<Setter Property="Canvas.Left">
<Setter.Value>
<MultiBinding Converter="{StaticResource BPositionConverter}"
ConverterParameter="Left">
<Binding Path="ActualHeight"
RelativeSource="{RelativeSource Self}" />
<Binding Path="ActualWidth"
RelativeSource="{RelativeSource Self}" />
</MultiBinding>
</Setter.Value>
</Setter>
</Style>