How Can a Separator Be Added Between Items in an Itemscontrol

How can a separator be added between items in an ItemsControl

<ItemsControl ItemsSource="{Binding Numbers}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <!-- could use a WrapPanel if more appropriate for your scenario -->
            <StackPanel Orientation="Horizontal"/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock x:Name="commaTextBlock" Text=", "/>
                <TextBlock Text="{Binding .}"/>
            </StackPanel>
            <DataTemplate.Triggers>
                <DataTrigger Binding="{Binding RelativeSource={RelativeSource PreviousData}}" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="commaTextBlock" Value="Collapsed"/>
                </DataTrigger>
            </DataTemplate.Triggers>
        </DataTemplate>

    </ItemsControl.ItemTemplate>
</ItemsControl>

I arrived at your question because I was looking for a solution in Silverlight, which does not have a previous data relative source.

(WPF) How can a separator be added between items in an ItemsControl - Bug Fixing

It was not easy,but I realized what shall I do to fix this bug. My idea is to use custom Convertor, but I haven't any clever thoughts How to send ConverterParameter into convertor. But I've found solution.
Here is my convertor:

public class SeparatorConverter : IValueConverter
{
    private Visibility _visible;
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var element = (TextBlock) value;
        element.Loaded += ElementLoaded;
        return _visible;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return null; //not needed
    }
    private static void ElementLoaded(object sender, RoutedEventArgs e)
    {
        var element = sender as TextBlock;
        var parentItemsControl = element.FindParent(x => x is ItemsControl) as ItemsControl;
        var parentPanel = element.FindParent(x => x is Panel) as Panel;

        if (parentItemsControl == null || element == null || parentPanel== null)
            return;

        var itemText = parentPanel.FindName("MyTextBlock") as TextBlock;
        var collection = parentItemsControl.ItemsSource as IEnumerable<string>;

        if (itemText == null || collection == null)
            return;

        var list = collection.ToList();
        if (list.IndexOf(itemText.Text) == list.Count() - 1) // Can be incorrect because we can have two same items
           element.Visibility = Visibility.Collapsed;
    }
}

Find parent function:

public static DependencyObject FindParent(this DependencyObject element, Func<DependencyObject, bool> filter)
    {
        DependencyObject parent = VisualTreeHelper.GetParent(element);

        if (parent != null)
        {
            if (filter(parent))
            {
                return parent;
            }

            return FindParent(parent, filter);
        }

        return null;
    }

Here is my XAML code:

  <Coverters:SeparatorConverter x:Key="SeparatorVisibilityConverter">
    </Coverters:SeparatorConverter>
    <ItemsControl Grid.Row="1" ItemsSource="{Binding Value, IsAsync=False}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapPanel>
            </WrapPanel>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <WrapPanel>
                <TextBlock x:Name="MyTextBlock" Text="{Binding}" Style="{StaticResource TextBlockInListViewItem}"  TextWrapping="WrapWithOverflow"/>
                <TextBlock x:Name="commaTextBlock" Style="{StaticResource TextBlockInListViewItem}" Text=", " Visibility="{Binding RelativeSource={RelativeSource Self},
                            Converter={StaticResource SeparatorVisibilityConverter}}"/>
            </WrapPanel>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

Ok. Any way, If you have another idea how to fix this bug, you could post your answer here=)

WPF how to put separator below each item in horizontal stackpanel

make the first stackpanel vertical and put the content control and the label inside of a horizontal stackpanel. something like this:

<StackPanel>
    <StackPanel Orientation="Horizontal">
        <ContentControl  Content="{StaticResource  Appbar_Suitcase}" />
        <Label Content="{Binding Name}"/>
    </StackPanel>

    <Separator Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />
</StackPanel>

ListView separator between items

You need to use a DataTemplateSelector for this. First you need to create Two DataTemplate's

For example: In a simple ItemsControl which I want to show you a list of String, My Two DataTemplate's would look like below.

<Page.Resources>  
    <DataTemplate x:Name="AllItems">  
        <Border BorderBrush="{StaticResource SystemControlBackgroundBaseLowBrush}" BorderThickness="0,0,0,2">  
            <TextBlock Text="{Binding ''}" Padding="10" Margin="10,0" />  
        </Border>  
    </DataTemplate>  
    <DataTemplate x:Name="LastItems">  
            <TextBlock Text="{Binding ''}" Padding="10" Margin="10,0" />  
    </DataTemplate>  
</Page.Resources>

Now I create a DataTemplateSelector and Check if the Item that I need to apply the DataTemplate is Last one or not.

public class ItemsDataTemplateSelector: DataTemplateSelector
{
    public DataTemplate AllItems { get; set; }
    public DataTemplate LastItems { get; set; }

    protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
    {
        DataTemplate _returnTemplate = new DataTemplate();
        var itemsControl = ItemsControl.ItemsControlFromItemContainer(container);
        if (itemsControl.IndexFromContainer(container) == (itemsControl.ItemsSource as List<String>).Count-1)
        {
            _returnTemplate = LastItems;
        }
        else
        {
            _returnTemplate = AllItems;
        }
        return _returnTemplate;
    }
}

Now my ItemsControl Implementation would be

<ItemsControl x:Name="listView">  
    <ItemsControl.ItemTemplateSelector>  
        <local:ItemsDataTemplateSelector AllItems="{StaticResource AllItems}" LastItems="{StaticResource LastItems}" />  
    </ItemsControl.ItemTemplateSelector>  
</ItemsControl>

Here is how i set the ItemsSource to ItemsControl

List<String> items = new List<string>();  
for (int i = 1; i <= 5; i++)  
{  
    items.Add("Item " + i.ToString());  
}  
listView.ItemsSource = items;  

Below is your output. You can see Last Item does not have a Border

Separator in ItemsControl renders in different shades for each item

Try SnapsToDevicePixels="True"

<ItemsControl ItemsSource="{Binding Path=Items}" SnapsToDevicePixels="True">

If this doesn't help you can also try with

• UseLayoutRounding="True" (WPF 4)
• RenderOptions.EdgeMode="Aliased" (Turn of anti-aliasing)

Text separator between ListView in WPF

Duplicate of How can a separator be added between items in an ItemsControl, try this:

<ItemsControl Name="theListBox">
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <StackPanel Orientation="Horizontal"/>
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <StackPanel Orientation="Horizontal">
                    <TextBlock x:Name="seperator" Text=" | "/>
                    <TextBlock Text="{Binding}"/>
                </StackPanel>
                <DataTemplate.Triggers>
                    <DataTrigger Binding="{Binding RelativeSource={RelativeSource PreviousData}}" Value="{x:Null}">
                        <Setter Property="Visibility" TargetName="seperator" Value="Collapsed"/>
                    </DataTrigger>
                </DataTemplate.Triggers>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>

Stretching the items of an ItemsControl

You have two columns in your main (outer) grid, yet you use only the first column.
The second column uses all the remaining space.

---

Related Topics