Width of items in ItemsControl

Question

I have an ItemsControl with a DataTemplate that is bound to an ObservableCollection of integers.

<ItemsControl Name="DimsContainer" ItemTemplate="{StaticResource DimensionsTemplate}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal"/>
        </ItemsPanelTemplate>
   </ItemsControl.ItemsPanel>
</ItemsControl>

And in the Windows Resources:

<Window.Resources>
    <DataTemplate x:Key="DimensionsTemplate" >
        <TextBlock Text="{Binding}"
                       Padding="5"
                       VerticalAlignment="Center"
                       FontSize="32"/>
    </DataTemplate>
</Window.Resources>

My problem is that in code, I need to be able to determine the width of the TextBlocks (or whatever the element is if I change it later) in the ItemsControl. Does anyone have an idea how to do this?

When I do DimsContainer.Items[i] it gives me the bound item not the TextBlock.

Answer 1

You should be able to use instead:

DimsContainer.ItemContainerGenerator.ContainerFromIndex(i);

This won't give you the TextBlock itself, but it will give you the generated ContentPresenter that is wrapped around it by the ItemsControl to contain the ItemTemplate.