inabox/InABox.DynamicGrid/FormDesigner/Controls/DFImageControl.cs

using InABox.Clients;
using InABox.Core;
using InABox.WPF;
using Org.BouncyCastle.Crmf;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace InABox.DynamicGrid
{
    public class DFImageControl : DynamicFormControl<DFLayoutImage>
    {
        private static readonly Dictionary<Guid, BitmapImage> images = new();
        protected override FrameworkElement Create()
        {
            var image = new Image();
            if (Control.Image.IsValid())
            {
                if (images.ContainsKey(Control.Image.ID)) image.Source = images[Control.Image.ID];
                new Client<Document>().Query(
                    new Filter<Document>(x => x.ID).IsEqualTo(Control.Image.ID),
                    new Columns<Document>(x => x.ID, x => x.Data),
                    null,
                    (data, error) =>
                    {
                        var bytes = data?.Rows.FirstOrDefault()?.Get<Document, byte[]>(x => x.Data);
                        var source = new BitmapImage();
                        source.LoadImage(bytes);
                        images[Control.Image.ID] = source;
                        Dispatcher.Invoke(() => { image.Source = source; });
                    }
                );
            }

            image.Stretch = Stretch.Uniform;
            return image;
        }
    }
}