AOT ICustomProperty Error for 'WinUI.TableView.TableViewCell'

[ghost1372]

Hi @w-ahmad
i get following error when using TableView under Native AOT.

ICustomProperty support used by XAML binding for type 'WinUI.TableView.TableViewCell' (property 'TableView') requires the type to marked with 'WinRT.GeneratedBindableCustomPropertyAttribute'. If this is a built-in type or a type that can't be marked, a wrapper type should be used around it that is marked to enable this support.

<tv:TableView.Columns>
    <tv:TableViewTextColumn x:Uid="SearchPage_SuraId"
                            Width="80"
                            Binding="{Binding SuraId}" />
    <tv:TableViewTextColumn x:Uid="SearchPage_SuraName"
                            Width="100"
                            Binding="{Binding SuraName}" />
    <tv:TableViewTextColumn x:Uid="SearchPage_AyaId"
                            Width="80"
                            Binding="{Binding AyaId}" />
    <tv:TableViewTemplateColumn x:Uid="SearchPage_AyaText"
                                Width="500"
                                CanFilter="True"
                                CanSort="True">
        <tv:TableViewTemplateColumn.CellTemplate>
            <DataTemplate>
                <common:TextBlockEx FontFamily="{x:Bind common:ProxyService.Instance.QuranFontFamily, Mode=OneWay}"
                                    FontSize="{x:Bind common:ProxyService.Instance.QuranFontSize, Mode=OneWay}"
                                    Foreground="{x:Bind common:ProxyService.Instance.QuranColor, Mode=OneWay}"
                                    HighlightingText="{Binding ElementName=Root, Path=ViewModel.Query}"
                                    Text="{Binding Aya, Mode=OneWay}"
                                    TextAlignment="{x:Bind common:ProxyService.Instance.VerseTextAlignment, Mode=OneWay}"
                                    TextWrapping="Wrap" />
            </DataTemplate>
        </tv:TableViewTemplateColumn.CellTemplate>
    </tv:TableViewTemplateColumn>
    <tv:TableViewTemplateColumn x:Uid="SearchPage_Translation"
                                Width="500"
                                CanFilter="True"
                                CanSort="True">
        <tv:TableViewTemplateColumn.CellTemplate>
            <DataTemplate>
                <common:TextBlockEx FontFamily="{x:Bind common:ProxyService.Instance.TranslationFontFamily, Mode=OneWay}"
                                    FontSize="{x:Bind common:ProxyService.Instance.TranslationFontSize, Mode=OneWay}"
                                    Foreground="{x:Bind common:ProxyService.Instance.TranslationColor, Mode=OneWay}"
                                    HighlightingText="{Binding ElementName=Root, Path=ViewModel.Query}"
                                    Text="{Binding Translation, Mode=OneWay}"
                                    TextAlignment="{x:Bind common:ProxyService.Instance.TranslationTextAlignment, Mode=OneWay}"
                                    TextWrapping="Wrap" />
            </DataTemplate>
        </tv:TableViewTemplateColumn.CellTemplate>
    </tv:TableViewTemplateColumn>
</tv:TableView.Columns>

[ghost1372]

You need to enable WarningLevel to catch more issues.

<CsWinRTAotWarningLevel>2</CsWinRTAotWarningLevel>

[ghost1372]

I added WinUI.TableView.csproj to my project (removed nuget package) and now exception is gone but everything is empty!

[w-ahmad]

I added WinUI.TableView.csproj to my project (removed nuget package) and now exception is gone but everything is empty!

it is worked because I added WinRT.GeneratedBindableCustomProperty in PR #264 to the cells and headers. but the real problem is that TableView rely on heavily on traditional bindings and these bindings are not AOT supported at this time. So, at this time, the TableView is not supported with native AOT and will always show empty cells.

[ghost1372]

Thank you @w-ahmad
but this should be documented somewhere, also is there any plan to use x:Bind and support AOT?

[w-ahmad]

I don't actually know how it's going to be implemented and I do not have any plans yet but would think about it after the v1.4 release.

[BlameTwo]

@w-ahmad In fact, binding code can be generated for entity classes using the source generator. However, I currently have no idea about the specific operation. At least, this can avoid reflection.