ItemsControl with horizontal orientation

Do you know any controls inherited from the ItemsControl that have horizontal orientation of items?

Simply change the panel used to host the items:

<ItemsControl ...>
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal"/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
</ItemsControl>

While the promoted answer is great, here's an alternative if you want the items to stretch.

<ItemsControl.ItemsPanel>                              
    <ItemsPanelTemplate>
        <UniformGrid Rows="1" />
    </ItemsPanelTemplate>
</ItemsControl.ItemsPanel>   

This is an example of how to do horizontal scrolling within an ItemsControl.

Firstly the main window viewmodel class used to get/set the list of items we wish to display.

MainWindowViewModel.cs

using System.Collections.Generic;

namespace ItemsControl
{
   public class Item
   {
      public Item(string title)
      {
         Title = title;
      }
 
      public string Title { get; set; }
   }
 
   public class MainWindowViewModel
   {
      public MainWindowViewModel()
      {
         Titles = new List<Item>()
         {
            new Item("Slide 1"),
            new Item("Slide 2"),
            new Item("Slide 3"),
            new Item("Slide 4"),
            new Item("Slide 5"),
            new Item("Slide 6"),
            new Item("Slide 7"),
            new Item("Slide 8"),
         };
      }
 
      public List<Item> Titles { get; set; }
   }
}

The main window xaml for the view:

MainWindow.xaml

    <Window x:Class="ItemsControl.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ItemsControl"      
        mc:Ignorable="d"
        Title="MainWindow" Height="400" Width="400">
 
    <Window.DataContext>
        <local:MainWindowViewModel />
    </Window.DataContext>
 
    <Grid Margin="5">
        <ScrollViewer
            VerticalScrollBarVisibility="Disabled"
            HorizontalScrollBarVisibility="Auto">
 
            <ItemsControl
                x:Name="SearchResultList"                
                ItemsSource="{Binding Titles}">
 
                <ItemsControl.ItemsPanel>
                    <ItemsPanelTemplate>
                        <WrapPanel Orientation="Vertical"/>
                    </ItemsPanelTemplate>
                </ItemsControl.ItemsPanel>
 
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <Border
                            Margin="5"
                            BorderThickness="1"
                            BorderBrush="Aqua">
 
                            <TextBlock
                                Text="{Binding Title}"
                                HorizontalAlignment="Center"                               
                                VerticalAlignment="Top"
                                FontSize="12"
                                TextWrapping="Wrap"
                                TextAlignment="Center"
                                FontWeight="DemiBold"  
                                Width="150"
                                Height="150" />
                        </Border>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
 
            </ItemsControl>
        </ScrollViewer>
 
    </Grid>
</Window>

Depending on how high/wide your client area is, this will result in this kind of layout, overflow items scrolled horizontally:

More details can be found at this blog link, including an example on how to do the scrolling vertically:

http://www.technical-recipes.com/2017/how-to-orient-wrappanel-items-within-itemscontrol-lists-vertically-and-horizontally/

The top answer is good, but I couldn't get it to work with UserControls. If you need UserControls, this should help.

ItemsControl with Horizontal Usercontrols

My Version:

<Window.Resources>
    <DataTemplate x:Key="ItemTemplate2">
        <StackPanel>
            <uc:MyUserControl MinWidth="20" BorderBrush="Black" BorderThickness="0.1" />
        </StackPanel>
    </DataTemplate>

    <ItemsPanelTemplate x:Key="ItemsPanelTemplate1">
        <StackPanel Orientation="Horizontal" Margin="0,0,0,0"/>
    </ItemsPanelTemplate>
</Window.Resources>

<StackPanel>
    <ItemsControl x:Name="list_MyControls"
                  HorizontalAlignment="Left"
                  VerticalAlignment="Top"
                  Margin="0,8,0,0"
                  ItemTemplate="{StaticResource ItemTemplate2}"
                  ItemsPanel="{StaticResource ItemsPanelTemplate1}" />
</StackPanel>

To bind to data, you will need to add an ItemsSource to the ItemsControl in the XAML or code behind. Also note that uc: would be the xmlns:uc="NamespaceOfMyControl" declared at the top of the file.

For a long list with hundreds or even thousands of items, you should better use VirtualizingStackPanel to avoid performance issues.