"convertor on imagesource - convert image to grayscale" Code Answer

although you can do it with a converter, there is a much better option: using a shader effect. you'll find an implementation of a greyscaleeffect on this page.

<style x:key="grayedifnotlogged" targettype="image">
    <style.triggers>
        <datatrigger binding="{binding statusinfo.islogged}" value="false">
            <setter property="effect">
                <setter.value>
                    <fx:grayscaleeffect />
                </setter.value>
            </setter>
        </datatrigger>
    </style.triggers>
</style>

...

<image source="..." style="{staticresource grayedifnotlogged}" />

By Highly Irregular on September 16 2022