Gaps between items in my ListBox

Rasto picture Rasto · Jan 16, 2011 · Viewed 26.2k times · Source

When I create ListBox with horizontal items ordering for example like this:

<DockPanel>
    <ListBox>
        <ListBox.ItemsPanel>
            <ItemsPanelTemplate>
                <VirtualizingStackPanel Orientation="Horizontal" />
            </ItemsPanelTemplate>
        </ListBox.ItemsPanel>
        <ListBoxItem>
            <Button Content="Hello" />
        </ListBoxItem>
        <ListBoxItem>
            <Button Content="Hello" />
        </ListBoxItem>
    </ListBox>
</DockPanel>

I have small gaps between buttons in the list as indicated by the arrows on following picture:

Picture showing gaps

How can I get rid of those gaps please ? I need to have items in ListBox just next to each other. I have tried changing ItemTemplate of the ListBox but it did not help.

Answer

Jobi Joy picture Jobi Joy · Jan 16, 2011

This is because of the padding inside the default ItemContainerStyle for ListBoxItem. To remove this you can override the ItemContainerStyle. For example just try the below Empty ItemContainerStyle to your ListBox and you can see the margin is no more.

    <ListBox >
        <ListBox.ItemsPanel>
            <ItemsPanelTemplate >
                <VirtualizingStackPanel IsItemsHost="True" Orientation="Horizontal"/>
            </ItemsPanelTemplate>
        </ListBox.ItemsPanel>
        <ListBox.ItemContainerStyle>
            <Style TargetType="{x:Type ListBoxItem}">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="{x:Type ListBoxItem}">
                            <ContentPresenter/>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListBox.ItemContainerStyle>
        <Button Content="hello1" Width="75"/>
        <Button Content="Hello2" Width="75"/>
    </ListBox>