'WPF Wrap Panel that outlines 4 columns at a time

I have a list view with a wrap panel as its itemsPanelTemplate. The items in the wrap panel are going to be displayed in pages in groups of 28. I would like to draw a box around every 28 items, or every 4 columns so that you "preview" the page layout more easily.
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If not a box, vertical lines after every 4th column would do. Thank you for taking the time to read my question.

c++sharpwpfxamlwrappanel


Solution 1:[1]

In order to add a border for each list view item (28 items each), you can define the ItemContainerStyle like this.

<ListView>
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <Setter Property="BorderBrush" Value="DarkGray"/>
            <Setter Property="BorderThickness" Value="1"/>
            <Setter Property="Margin" Value="3"/>
        </Style>
    </ListView.ItemContainerStyle>



</ListView>

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Andrew KeepCoding

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