private void RefreshPreview(string propertyName) { if (propertyName != "Preview" && !string.IsNullOrEmpty(ProjectPath.Trim())) { ProjectPathPrinterLayer projectPathPrinterLayer = new ProjectPathPrinterLayer(); projectPathPrinterLayer.LoadFromViewModel(this); using (Bitmap bitmap = new Bitmap(460, 50)) { PlatformGeoCanvas canvas = new PlatformGeoCanvas(); canvas.BeginDrawing(bitmap, new RectangleShape(-180, 90, 180, -90), GeographyUnit.Meter); projectPathPrinterLayer.SafeProcess(() => { projectPathPrinterLayer.Draw(canvas, new Collection <SimpleCandidate>()); }); canvas.EndDrawing(); MemoryStream ms = new MemoryStream(); bitmap.Save(ms, ImageFormat.Png); BitmapImage bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.StreamSource = ms; bitmapImage.EndInit(); preview = bitmapImage; RaisePropertyChanged(() => Preview); } } }