Get Images from Custom Field in One Query – Sitefinity

Consider a situation where we have a custom image field (let’s call it ImageGallery) and we would want to get all images from all items of the module. Let’s take an example of the News module with the image field allowing to select multiple images.

public IQueryable<Image> GetAllImages(int count = 0)
{
    string fieldName = "ImageGallery";
    string parentItemTypeName = typeof(NewsItem).FullName;
    var librariesManager = Telerik.Sitefinity.Modules.Libraries.LibrariesManager.GetManager();
    var contentLinksManager = Telerik.Sitefinity.Data.ContentLinks.ContentLinksManager.GetManager();

    var parentItems = GetAll();
    var parentItemIds = parentItems.Select(i => i.OriginalContentId).ToList();

    var allImages = librariesManager.GetImages().Where(i => i.Status == ContentLifecycleStatus.Live && i.Visible);

    var contentLinks = contentLinksManager.GetContentLinks().Where(cl => cl.ParentItemType == parentItemTypeName && cl.ComponentPropertyName == fieldName && parentItemIds.Contains(cl.ParentItemId));

    var relatedImages = contentLinks.Join<Telerik.Sitefinity.Model.ContentLinks.ContentLink, Image, Guid, Image>(
        allImages, 
        (cl) => cl.ChildItemId, 
        (i) => i.OriginalContentId, 
        (cl, i) => i
        );

    if (count > 0)
    {
        relatedImages = relatedImages.Take(count);
    }

    return relatedImages();
}

public IQueryable<NewsItem> GetAll()
{
    var manager = Telerik.Sitefinity.Modules.News.NewsManager.GetManager();
    var items = manager.GetNewsItems().Where(i => i.Status == ContentLifecycleStatus.Live && i.Visible);

    return items;
}

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