Question

我有一个像这样的ListView：

<ListView x:Name="ArtistsList"
          ItemsSource="{Binding Source={StaticResource ArtistsCVS}}"
          SelectionMode="None"
          ItemContainerStyle="{StaticResource ListViewContainerStrecher}"
          IsItemClickEnabled="True"
          ItemClick="ArtistsList_ItemClick">

    <ListView.ItemTemplate>
        <DataTemplate x:DataType="local:DAPP">
            <Grid AutomationProperties.Name="{Binding artist}"
                  AutomationProperties.HelpText="Navigate to artist info page.">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="80"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <Image Grid.Column="0"
                       MaxWidth="60"
                       Source="{Binding thumb}"
                       HorizontalAlignment="Center"/>

                <Grid Grid.Column="1" VerticalAlignment="Center">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>

                    <TextBlock Grid.Row="0" Text="{Binding artist}"/>
                </Grid>
            </Grid>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

当我尝试使用讲述人时，它会读取艺术家名称，但它不会阅读帮助文本。另外，我想知道是否可以将两个值绑定到AutomationProperties.Name？

例如，我有一个ArtistName和一个SongName然后例如使用AutomationProperties.Name = "{Binding ArtistName};{Binding songName}"然后它读取像艺术家（小暂停）SongName。

Answer 1

当我尝试使用讲述人时，它会读取艺术家名称，但它不会阅读帮助文本。

在ListView内设置AutomationProperties.HelpText attached property在这里不起作用。要解决此问题，我们可以使用自定义ListView和覆盖PrepareContainerForItemOverride方法来设置自动化属性。这也是为public class MyList : ListView { protected override void PrepareContainerForItemOverride(DependencyObject element, object item) { base.PrepareContainerForItemOverride(element, item); FrameworkElement source = element as FrameworkElement; source.SetBinding(AutomationProperties.NameProperty, new Binding { Path = new PropertyPath("Content.artist"), RelativeSource = new RelativeSource() { Mode = RelativeSourceMode.Self } }); AutomationProperties.SetHelpText(source, "Navigate to artist info page."); } }中的项添加辅助功能支持的推荐方法。

例如：

MyList

然后，您可以使用ListView代替AutomationProperties.Name，而无需再在AutomationProperties.HelpText中设置Grid和ArtistName。有关详细信息，请参阅XAML accessibility sample。

我想知道是否可以将两个值绑定到AutomationProperties.Name？

UWP没有开箱即用的多重绑定支持。但是如果songName和public class AutomationPropertiesConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, string language) { //Suppose ArtistName and songName are the properties of Song class var song = (Song)value; return $"{song?.ArtistName} - {song?.songName}"; } public object ConvertBack(object value, Type targetType, object parameter, string language) { throw new NotImplementedException(); } }来自一个模型或视图模型，那么我们可以使用转换器来实现这一点：

public class MyList : ListView
{
    protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
    {
        base.PrepareContainerForItemOverride(element, item);
        FrameworkElement source = element as FrameworkElement;

        //Suppose Song class is the DataType of the DataTemplate
        source.SetBinding(AutomationProperties.NameProperty, new Binding
        {
            Path = new PropertyPath("Content"),
            RelativeSource = new RelativeSource() { Mode = RelativeSourceMode.Self },
            Converter = new AutomationPropertiesConverter()
        });

        AutomationProperties.SetHelpText(source, "Navigate to artist info page.");
    }
}

使用转换器，如：

cd C:\folder
setlocal enabledelayedexpansion


SET /A COUNT=0

for %%a in (*.jpg) do (
    SET /A COUNT+=1
    ECHO !COUNT!
    set f=%%a
    IF !COUNT! GTR 9 (
        set f=!f:^00 (=!
    ) ELSE (
        set f=!f:^0 (=!
    )
    set f=!f:^)=!
    ren "%%a" "!f!"
)
pause

AutomationProperties.HelpText不适用于UWP ListView

1 个答案: