c# - 为什么我不能在 XAML 中定义带有转换的几何图形？

Question

我正在尝试创建一个 ResourceDictionary á la this answer包含 StreamGeometries 的 Transforms 集:

<ResourceDictionary>
    <StreamGeometry x:Name="Chevrons">
        <StreamGeometry.Transform>
            <TranslateTransform X="20" Y="120"/>
        </StreamGeometry.Transform>
        M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 17 [...]
    </StreamGeometry>
</ResourceDictionary>

但是，我收到以下错误:

1: Cannot add content to an object of type "StreamGeometry".

和

2: TypeConverter syntax error encountered while processing initialization string '{PathData}'. Element attributes are not allowed on objects created via TypeConverter.

所以我尝试使用 PathGeometry 并得到了这个错误:

The specified value cannot be assigned to the collection. The following type was expected: "PathFigure".

有什么方法可以将转换应用于 XAML 代码中的几何图形？还是我只需要通过代码来完成？

Answer 1

你可以这样写:

<PathGeometry x:Key="Chevrons">
    <PathGeometry.Transform>
        <TranslateTransform X="20" Y="120"/>
    </PathGeometry.Transform>
    <PathGeometry.Figures>
        M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 ...
    </PathGeometry.Figures>
</PathGeometry>

或者像这样:

<PathGeometry x:Key="Chevrons"
    Figures="M21.750001,94.749999 L34.000002,117.66218 30.625003,133.62501 ...">
    <PathGeometry.Transform>
        <TranslateTransform X="20" Y="120"/>
    </PathGeometry.Transform>
</PathGeometry>