I followed suggestions from here: https://gist.github.com/tompipe/beaf44f29d416249dfdeaa9d1b24956a

I found it to be an excellent solution to overcome a strange limitation. It works fine for content ListViews.

Now I tried to extend it to cover member ListViews as well. I find the member content. The items collection is iterated. The prop.Value is detected, translated and set with new display text value. BUT the displayed view still holds the id arrays: ["38"] and not the generated texts.

Why is that? Is there some hidden difference in how member list views are displayed compared to content list views? Is there a difference in event chain causing the updated values to be neglected?

I am really confused.

public class FixDropDownPreValueDisplayInListViewsHandler : DelegatingHandler
{
    // Ensure we're only processing requests to getchildren - hopefully only listviews
    private static readonly string[] PathsWithTranslationNeeds = { "/umbraco/backoffice/UmbracoApi/Content/GetChildren", "/umbraco/backoffice/UmbracoApi/Member/GetPagedResults" };

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        // Wait for the request to be processed
        var response = await base.SendAsync(request, cancellationToken);

        var absolutePath = request?.RequestUri?.AbsolutePath;
        if (!absolutePath.IsNullOrWhiteSpace() && PathsWithTranslationNeeds.Contains(absolutePath))
        {
            var content = (ObjectContent)response.Content;

            // Swap individual properties with text representation where appropriate
            switch (content?.Value)
            {
                case PagedResult<ContentItemBasic<ContentPropertyBasic, IContent>> contentResult:
                    if (contentResult.Items != null)
                    {
                        foreach (var item in contentResult.Items)
                        {
                            if (item != null)
                            {
                                foreach (var prop in item.Properties.Where(p => DropListTranslator.IsTranslatedType(p.Editor)))
                                {
                                    prop.Value = DropListTranslator.GetText(prop.Value);
                                }
                            }
                        }
                    }
                    break;

                case PagedResult<MemberBasic> memberResult:
                    if (memberResult.Items != null)
                    {
                        foreach (var item in memberResult.Items)
                        {
                            if (item != null)
                            {
                                foreach (var prop in item.Properties.Where(p => DropListTranslator.IsTranslatedType(p.Editor)))
                                {
                                    prop.Value = DropListTranslator.GetText(prop.Value);
                                }
                            }
                        }
                    }
                    break;
            }
        }

        return response;
    }
}