WPF Live-Regions 仅适用于讲述人? [英] WPF Live-Regions just for Narrator?

问题描述

我有一个带有 AutomationProperties.LiveSettings="Assertive" 的文本块 (ContentTextBlock).我只是在测试和检查这个功能有多大用处.而且……到目前为止我很失望.

I have a textblock (ContentTextBlock) with AutomationProperties.LiveSettings="Assertive". I'm just testing and checking how useful this feature is. And... am disappointed so far.

private void Button_Click(object sender, RoutedEventArgs e)
{
   ContentTextBlock.Text += " test";
    var peer = UIElementAutomationPeer.FromElement(ContentTextBlock);
    if(peer == null)
    {
    peer = UIElementAutomationPeer.CreatePeerForElement(ContentTextBlock);
peer.RaiseAutomationEvent(AutomationEvents.LiveRegionChanged);
    }
peer.RaiseAutomationEvent(AutomationEvents.LiveRegionChanged);
}

使用讲述人时，这如宣传的那样工作.每当单击按钮时，讲述人都会宣布 TextBlock 文本(test"test test"test test test")......但是当我使用 NVDA 或 JAWS 时，没有任何反应，尽管屏幕阅读器版本相对最新.他们真的没有添加对实时区域的任何支持，还是我只是遗漏了一个重要点?

When using Narrator, this works as advertised. Whenever clicking the button, Narrator announces the TextBlock text ("test" "test test" "test test test")... But when I use NVDA or JAWS, nothing happens, although the screenreader versions are relatively up-to-date. Did they really not add any support for live-regions or am I just missing an important point?

推荐答案

虽然我没有设法让实时区域工作，但我找到了另一种解决方法:

Whilst I didn't manage to get live regions to work, I found another workaround:

Davy Kager 的 Tolk

Tolk 是一个库，它可以，其中包括

Tolk is a library which can, among oterrs

• 检测正在运行的受支持的屏幕阅读器(如果有)
• 将字符串传递给屏幕阅读器的语音引擎和盲文.
• 还支持 SAPI

要在您的 C# 项目中包含 Tolk，请从上面的链接下载它，然后在您的项目中包含 tolk.cs(来自 src/dotnet)，并将 tolk.dll(它位于 bin 中)包含在您的可执行文件(或 PATH 变量中的某处)的文件夹中.确保 dll 版本与您的 CPU 目标 (x86/x64) 匹配.对 lib 目录中的 dll 执行相同的操作.然后就可以根据examples文件夹中的代码使用了.

To include Tolk in your C# project, download it from the link above, then include tolk.cs (from src/dotnet) in your project, and place tolk.dll (it's found in bin) in the folder with your executable (or somewhere in the PATH variable). Make sure that the dll version matches your CPU target (x86/x64). Do the same for the dlls in the lib directory. Then you can use it according to the code found in the examples folder.

附注.Tolk 也适用于 Win 7，所以这是一个奖励.WPF 的实时区域仅从 Win 8 开始支持.

PS. Tolk works on Win 7 as well, so that's a bonus. The live-regions of WPF were only supported from Win 8 on.

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