转换器返回Segoe MDL2图标绑定后不起作用 [英] Converter returning Segoe MDL2 icon after binding does not work

问题描述

我正在尝试将PlayerFramework.MediaPlayer.CanPause属性绑定到Windows 10通用应用程序中的按钮。这可以使用默认字体，但是当我切换到Segoe MDL2以获得这些花哨的图标时，该按钮显示垃圾。

I'm trying to bind the PlayerFramework.MediaPlayer.CanPause Property to a Button in my windows 10 universal app. This works using the default font, but when I switch to Segoe MDL2 to get those fancy icons the button shows garbage.

<mmppf:MediaPlayer x:Name="mediaElement">

...

<Button Name="btnPlay" 
        Style="{StaticResource transportStyle}"  Content="{Binding CanPause, ElementName=mediaElement, Converter={StaticResource CanPauseToPlayPauseConverter}}"/>

这是从转换器：

public object Convert(object value, Type targetType, object parameter, string language)
    {
        bool canPause = (bool)value;
        if (canPause)
            return @"";
        // "play"
        return "";
    }

...此按钮样式：

<Style x:Name="transportStyle"  TargetType="Button">
       <!-- <Setter Property="FontFamily" Value="Segoe MDL2 Assets" />-->
</Style>

禁用Setter属性后，该按钮显示预期值

After disabling the Setter property the button shows the expected value



直接设置为按钮内容，显示播放符号。

which, directly set as the button content, shows the play symbol.

任何想法为什么不起作用？

Any ideas why this doesn't work?

编辑：从字符表中复制字符并返回它可以正常工作。

edit: Copying the character from the character table and returning it does work.

推荐答案

&＃xE102; 是XML中的unicode字符转义序列（因此也在XAML中）。在C＃中，它被写为 \\\ 。

 is a unicode character escape sequence in XML (and hence also in XAML). In C# it is written as \uE102.

所以转换器应该返回字符串（或字符） C＃unicode字符转义序列：

So the converter should return strings (or characters) with proper C# unicode character escape sequences:

public object Convert(object value, Type targetType, object parameter, string language)
{
    return (bool)value ? "\uE769" : "\uE102";
}

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