使用转换器的 WPF SVG 图像绑定

WPF SVG image binding using a converter

我想更改图片来源:

<Image Source="{svg:SvgImage image.svg}"/>

改为对枚举使用绑定 属性:

XAML:

<Resources>
    <local:MyConverter x:Key="MyConverter" />
</Resources>    

<Image Source="{svg:SvgImage Binding MyEnumProperty, Converter={StaticResource MyConverter}}" />

后面的代码:

public enum MyEnum 
{
    Value1,
    Value2
}

public class MyConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var myValue = (MyEnum)(value);
        switch (myValue)
        {
            case MyEnum.Value1:
                return "image1.svg";
            case MyEnum.Value2:
                return "image2.svg";
            default:
                throw new NotImplementedException();
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

这不起作用,我怀疑这与 svg:SvgImageBinding MyEnumProperty 在同一语句中组合有关。

我收到以下错误:

The member "Converter" is not recognized or is not accessible.

The property 'Converter' was not found in type 'SvgImageExtension'.

问题: 正确的做法是什么?

表达式

{svg:SvgImage Binding MyEnumProperty ...}

无效XAML,并且由于 SvgImage 是标记扩展,您无法绑定其属性。

但是,您可以在图像样式中使用 DataTriggers 而不是使用转换器进行绑定:

<Image>
    <Image.Style>
        <Style TargetType="Image">
            <Style.Triggers>
                <DataTrigger Binding="{Binding MyEnumProperty}" Value="Value1">
                    <Setter Property="Source" Value="{svg:SvgImage image1.svg}"/>
                </DataTrigger>
                <DataTrigger Binding="{Binding MyEnumProperty}" Value="Value2">
                    <Setter Property="Source" Value="{svg:SvgImage image2.svg}"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </Image.Style>
</Image>