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Grapfics/RenderVisualService.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GroundOrganizer
+{
+    public static class RenderVisualService
+    {
+        private const double defaultDpi = 96.0;
+
+        public static ImageSource RenderToPNGImageSource(Visual targetControl)
+        {
+            var renderTargetBitmap = GetRenderTargetBitmapFromControl(targetControl);
+
+            var encoder = new PngBitmapEncoder();
+            encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
+
+            var result = new BitmapImage();
+
+            using (var memoryStream = new MemoryStream())
+            {
+                encoder.Save(memoryStream);
+                memoryStream.Seek(0, SeekOrigin.Begin);
+
+                result.BeginInit();
+                result.CacheOption = BitmapCacheOption.OnLoad;
+                result.StreamSource = memoryStream;
+                result.EndInit();
+            }
+
+            return result;
+        }
+
+        public static void RenderToPNGFile(Visual targetControl, string filename)
+        {
+            var renderTargetBitmap = GetRenderTargetBitmapFromControl(targetControl);
+
+            var encoder = new PngBitmapEncoder();
+            encoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
+
+            var result = new BitmapImage();
+
+            try
+            {
+                using (var fileStream = new FileStream(filename, FileMode.Create))
+                {
+                    encoder.Save(fileStream);
+                }
+            }
+            catch (Exception ex)
+            {
+                System.Diagnostics.Debug.WriteLine($"There was an error saving the file: {ex.Message}");
+            }
+        }
+
+        private static BitmapSource GetRenderTargetBitmapFromControl(Visual targetControl, double dpi = defaultDpi)
+        {
+            if (targetControl == null) return null;
+
+            var bounds = VisualTreeHelper.GetDescendantBounds(targetControl);
+            var renderTargetBitmap = new RenderTargetBitmap((int)(bounds.Width * dpi / 96.0),
+                                                            (int)(bounds.Height * dpi / 96.0),
+                                                            dpi,
+                                                            dpi,
+                                                            PixelFormats.Pbgra32);
+
+            var drawingVisual = new DrawingVisual();
+
+            using (var drawingContext = drawingVisual.RenderOpen())
+            {
+                var visualBrush = new VisualBrush(targetControl);
+                drawingContext.DrawRectangle(visualBrush, null, new Rect(new Point(), bounds.Size));
+            }
+
+            renderTargetBitmap.Render(drawingVisual);
+            return renderTargetBitmap;
+        }
+    }
+}