3rdpartylibs/fastreports.wpf/FastReport.Core.Web/Application/Dialog/WebPictureBox.cs

using FastReport.Dialog;
using System.Drawing;
using System.IO;

namespace FastReport.Web
{
    public partial class Dialog
    {

        private string GetPictureBoxHtml(PictureBoxControl control)
        {
            return $"<div style=\"{GetPictureBoxStyle(control)}\"></div>";
        }

        private string GetPictureBoxStyle(PictureBoxControl control)
        {
            return $"{GetControlPosition(control)} {GetControlAlign(control)} {GetPictureBoxURL(control.Image)} padding:0;margin:0;";
        }

        private string GetPictureBoxURL(Image image)
        {
#if !WASM
            int hash = image.GetHashCode();
            if (!_webReport.PictureCache.ContainsKey(hash.ToString()))
            {
                using (MemoryStream picStream = new MemoryStream())
                {
                    image.Save(picStream, image.RawFormat);
                    byte[] imageArray = new byte[picStream.Length];
                    picStream.Position = 0;
                    picStream.Read(imageArray, 0, (int)picStream.Length);
                    _webReport.PictureCache.Add(hash.ToString(), imageArray);
                }
            }

            string url = WebUtils.ToUrl(_webReport.template_ROUTE_BASE_PATH, $"preview.getPicture?");
            return $"background: url('{url}reportId={_webReport.ID}&pictureId={hash}') no-repeat !important;-webkit-print-color-adjust:exact;";
#else
            return "";
#endif

        }
    }
}