如何在对项目进行分组的WPF ItemsControl上使用UI自动化? [英] How do I use UI Automation on a WPF ItemsControl that groups items?

问题描述

我正在使用 Microsoft UI自动化(即

I am using Microsoft UI Automation (i.e. AutomationElement) to run automated acceptance tests against my application. This has gone well, but I've hit a situation that doesn't appear to be exposed to the automation framework.

我有一个 ListBox )，我正在使用

I have an ItemsControl (although I could be using one of its derived controls, e.g. ListBox) and I am using CollectionViewSource to group items. Here is a complete window to demonstrate:

<Window x:Class="GroupAutomation.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Orchestra">
    <Window.Resources>

        <!-- Take some simple data -->
        <XmlDataProvider x:Key="SampleData" XPath="Orchestra/Instrument">
            <x:XData>
                <Orchestra xmlns="">
                    <Instrument Name="Flute" Category="Woodwind" />
                    <Instrument Name="Trombone" Category="Brass" />
                    <Instrument Name="French horn" Category="Brass" />
                </Orchestra>
            </x:XData>
        </XmlDataProvider>

        <!-- Add grouping -->
        <CollectionViewSource Source="{Binding Source={StaticResource SampleData}}" x:Key="GroupedView">
            <CollectionViewSource.GroupDescriptions>
                <PropertyGroupDescription PropertyName="@Category" />
            </CollectionViewSource.GroupDescriptions>
        </CollectionViewSource>
    </Window.Resources>

    <!-- Show it in an ItemsControl -->
    <ItemsControl ItemsSource="{Binding Source={StaticResource GroupedView}}" HorizontalAlignment="Left" Margin="4">
        <ItemsControl.GroupStyle>
            <GroupStyle>
                <GroupStyle.HeaderTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" />
                    </DataTemplate>
                </GroupStyle.HeaderTemplate>
            </GroupStyle>
        </ItemsControl.GroupStyle>
        <ItemsControl.ItemTemplate>
            <DataTemplate>
                <Border Padding="4" Margin="4" Background="#FFDEDEDE">
                    <StackPanel>
                        <Label Content="{Binding XPath=@Name}" />
                        <Button Content="Play" />
                    </StackPanel>
                </Border>
            </DataTemplate>
        </ItemsControl.ItemTemplate>
    </ItemsControl>
</Window>

这将产生一个窗口，其中包含按类别分组的项目，并且每个项目都有一个我想使用UI Automation单击的按钮:

This produces a window containing the items grouped into their categories, and each item has a button that I'd like to click with UI Automation:

_(来源: brizzly.com )

_{(source: brizzly.com)}

但是，如果我查看的是 UISpy. exe (或使用AutomationElement导航)，我只能看到这些组(即使在Raw视图中):

However, if I look in UISpy.exe (or navigate with AutomationElement) I only see the groups (even in the Raw view):

_{(来源: brizzly.com )}

_{(source: brizzly.com)}

如您所见，这些组在那里，但是它们不包含任何项目，因此没有地方可以找到这些按钮.我已经在WPF 3.5 SP1和WPF 4.0中进行了尝试，并获得了相同的结果.

As you can see, the groups are there but they contain no items, so there is nowhere to look for the buttons. I have tried this in both WPF 3.5 SP1 and WPF 4.0 and get the same result.

是否可以对分组的项目使用UI自动化，如果可以，如何使用?

Is it possible to use UI Automation on items that are grouped, and if so, how?

推荐答案

我遇到了这个问题，并通过实现

I came across this problem and managed to solve it by implementing a 'GenericAutomationPeer' from http://www.colinsalmcorner.com/post/genericautomationpeer--helping-the-coded-ui-framework-find-your-custom-controls and adding a special case for GroupItems.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Automation;
using System.Windows.Automation.Peers;
using System.Windows.Media;
using System.Xml;

namespace ClassLibrary1
{
    public class MyItemsControl : ItemsControl
    {
        protected override AutomationPeer OnCreateAutomationPeer()
        {
            return new GenericAutomationPeer(this);
        }
    }

    public class GenericAutomationPeer : UIElementAutomationPeer
    {
        public GenericAutomationPeer(UIElement owner) : base(owner)
        {
        }

        protected override List<AutomationPeer> GetChildrenCore()
        {
            var list = base.GetChildrenCore();
            list.AddRange(GetChildPeers(Owner));
            return list;
        }

        private List<AutomationPeer> GetChildPeers(UIElement element)
        {
            var list = new List<AutomationPeer>();
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(element); i++)
            {
                var child = VisualTreeHelper.GetChild(element, i) as UIElement;
                if (child != null)
                {
                    AutomationPeer childPeer;
                    if (child is GroupItem)
                    {
                        childPeer = new GenericAutomationPeer(child);
                    }
                    else
                    {
                        childPeer = UIElementAutomationPeer.CreatePeerForElement(child);
                    }
                    if (childPeer != null)
                    {
                        list.Add(childPeer);
                    }
                    else
                    {
                        list.AddRange(GetChildPeers(child));
                    }
                }
            }
            return list;
        }
    }

}

我希望这可以帮助仍在寻找答案的任何人！

I hope this helps anyone still searching for an answer!

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