MaterialDataGridComboBoxColumn display nothing

[jebissey]

Bug explanation

A very little program created with code from MaterialDesignToolKit shows no combobox

MaterialDesignPoc.zip

Version

4.9

[jebissey]

Thanks to
https://thomaslevesque.fr/2011/03/21/wpf-comment-faire-un-binding-dans-les-cas-o-on-nhrite-pas-du-datacontext/

MaterialDesignPoc.zip

I added BindingProxy class.
A nearly equivalent class seems to exist in MaterialDesign.
I wonder what is missing in the first program.

[nicolaihenriksen]

@jebissey I took a look at your first program, and I was able to fix the issue by moving the code below out of MainWindowView.xaml and into App.xaml instead:

<ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
        <materialDesign:CustomColorTheme BaseTheme="Light" PrimaryColor="ForestGreen" SecondaryColor="DarkGreen" />
        <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
        <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.DataGrid.xaml" />
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

I think @Keboo looked into a similar issue at some point, but I don't recall if he came to a conclusion as to why it does not work "at the window level".