Screenreader WPF Groupstyles

时间:2013-10-11 19:50:21

标签: c# wpf automation screen-readers

我正在尝试为AutomationProperties.Name控件模板中的控件设置GroupStyle属性,但它似乎什么也没产生。我把它设置在我的模板中的Expander上,但即使我只是放入一些没有绑定的文本,它也没有任何说明。我也尝试在GroupItem上放置一个setter,但也没有用。我有点失落。我希望小组项目上的属性可以解决它。

XAML:

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="WpfApplication8.MainWindow"
        x:Name="win"
        Title="MainWindow"
        Width="640"
        Height="480">

  <Grid x:Name="LayoutRoot">
    <ListBox x:Name="lstbx"
             Margin="71,45,99,78"
             ItemsSource="{Binding ElementName=win,
                                       Path=Samples}">
      <ListBox.GroupStyle>
        <GroupStyle>
          <GroupStyle.ContainerStyle>
            <Style TargetType="{x:Type GroupItem}">
              <Setter Property="AutomationProperties.Name"
                      Value="this is a test" />
              <Setter Property="KeyboardNavigation.TabNavigation"
                      Value="Cycle" />
              <Setter Property="Template">
                <Setter.Value>
                  <ControlTemplate TargetType="{x:Type GroupItem}">
                    <Expander Name="templateLstBxExpander"
                              AutomationProperties.Name="test test test"
                              IsExpanded="True">

                      <Expander.Header>
                        <StackPanel Orientation="Horizontal">
                          <Label Name="templateLstBxExpanderHeader"
                                 Content="{Binding Path=Name}"
                                 FontWeight="Bold" />
                        </StackPanel>
                      </Expander.Header>
                      <ItemsPresenter />
                    </Expander>
                  </ControlTemplate>
                </Setter.Value>
              </Setter>
            </Style>
          </GroupStyle.ContainerStyle>
        </GroupStyle>
      </ListBox.GroupStyle>
    </ListBox>
  </Grid>
</Window>

XAML.cs:

using System;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Collections.Generic;
using System.Collections.ObjectModel;
namespace WpfApplication8
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
    public static readonly DependencyProperty sampleProperty = DependencyProperty.Register(
        "Samples", typeof(ObservableCollection<sample>), typeof(MainWindow), new PropertyMetadata(new ObservableCollection<sample>()));

    public ObservableCollection<sample> Samples
    {
        get
        {
            return (ObservableCollection<sample>)this.GetValue(sampleProperty);
        }

        set
        {
            this.SetValue(sampleProperty, value);
        }
    }      

    public MainWindow()
    {
        this.InitializeComponent();

         CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lstbx.ItemsSource);
        PropertyGroupDescription groupDescription = new PropertyGroupDescription("Location");
        view.GroupDescriptions.Add(groupDescription);      
        sample test = new sample();
        test.Location = "one";
        test.Name = "blah blah";
        Samples.Add(test);
        sample test2 = new sample();
        test2.Location = "two";
        test2.Name = "ya ya";
        Samples.Add(test2);

    }
}
}

sample.cs:

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfApplication8
{
public class sample
{


    public string Name { set; get; }
    public string Location{ set; get; }

}

3 个答案:

答案 0 :(得分:0)

尝试将AutomationProperties.HelpTextName一起设置。

答案 1 :(得分:0)

问题在于屏幕阅读器应该如何达到该值。可以通过MSAA从光标访问Groupitems,但不能通过UIA访问。 UIA是用于WPF中可访问性的主要API。

UIA和WPF的核心问题是,当试图读取光标找到的控件时(其他方式是焦点和插入符号),通常会返回主窗口。

作为屏幕阅读器的开发人员,处理此问题的最佳方法是同时使用MSAA和UIA。如果UIA没有返回任何有价值的东西,请回到使用MSAA。

答案 2 :(得分:-2)

您可以使用DisplayMemberPath="Name"

    <ListBox x:Name="lstbx" Margin="71,45,99,78" ItemsSource="{Binding ElementName=win, Path=Samples}" DisplayMemberPath="Name" >

enter image description here

或者您可以使用.ToString()

public class sample
{
    public string Name { set; get; }

    public string Location { set; get; }

    public override string ToString()
    {
        return Name;
    }
}