Aspose.Slides.NET 19.2 解析ppt内容保存svg 保存ppt内部图片

转图片可以直接使用,需要注意传递宽高，也可以转svg再转图片(可能会在不同电脑上效果不同,建议是使用图片直接转)

slide.GetThumbnail(new System.Drawing.Size((int)windowWidth, (int)windowHeight)).Save($"slide_test.png", ImageFormat.Png);

如果需要根据ppt宽高比生成图片可以使用SlideSize获取宽高然后计算宽高比

Presentation presentation = new Presentation(filePath);
var size = presentation.SlideSize;

完整逻辑如下

// Load PowerPoint presentation
Presentation presentation = new Presentation("D:\\work\\code\\demo\\WPFPPT\\test.ppt");

var slide = presentation.Slides[3];

// Save slide as SVG
var stream = new FileStream(@"D:\图像{0}.svg", FileMode.Create);
slide.WriteAsSvg(stream);

foreach (var item in presentation.Slides)
{
    // 方法1 直接转成图片
    //获取屏幕宽高生成ppt截图
    double windowWidth = 0;
    double windowHeight = 0;
    Application.Current.Dispatcher.Invoke(() =>
    {
      windowWidth = Application.Current.MainWindow.Width;
      windowHeight = Application.Current.MainWindow.Height;
    });
    //传递宽高后可以生成清晰的图片
    //slide.GetThumbnail(new System.Drawing.Size((int)windowWidth, (int)windowHeight)).Save($"slide_test.png", ImageFormat.Png);


    // 方法2 转成svg后保存图片 
    var shapes = item.Shapes;
    foreach (var shape in shapes)
    {
        if(shape is  IPictureFrame image)
        {
            var img = image.PictureFormat.Picture.Image;

            var imageType = img.ContentType.Remove(0, img.ContentType.IndexOf("/") + 1);
            ImageFormat format  ;
            switch (imageType)
            {
                case "jpeg":
                    format = System.Drawing.Imaging.ImageFormat.Jpeg;
                    break;
                case "emf":
                    format = System.Drawing.Imaging.ImageFormat.Emf;
                    break;
                case "bmp":
                    format = System.Drawing.Imaging.ImageFormat.Bmp;
                    break;
                case "png":
                    format = System.Drawing.Imaging.ImageFormat.Png;
                    break;
                case "wmf":
                    format = System.Drawing.Imaging.ImageFormat.Wmf;
                    break;
                case "gif":
                    format = System.Drawing.Imaging.ImageFormat.Gif;
                    break;
            }

            img.SystemImage.Save(@$"D:\图像xx.{imageType}");
            //img.ContentType
            //img.BinaryData
            //image.PictureFormat.Picture.Image.BinaryData.Save(stream, Aspose.Slides.Export.SaveFormat.Png);
            //shape.Save(@"D:\图像{0}.png", Aspose.Slides.Export.SaveFormat.Png);
        }
            //presentation.Images.
            //image.Picture.Save(stream, Aspose.Slides.Export.SaveFormat.Png);
            //shape.Save(@"D:\图像{0}.png", Aspose.Slides.Export.SaveFormat.Png);
    }
}

注入授权

//对应的授权码
 var v19_12 = "xxxxxx";

 new Aspose.Slides.License().SetLicense(new MemoryStream(Convert.FromBase64String(v19_12)));

svg转图片

需要安装nuget包【svg】

public class SVGHelper
    {
        /// <summary>
        /// 保持svg为图片
        /// </summary>
        /// <param name="path"></param>
        /// <param name="imgPath"></param>
        /// <returns></returns>
        public static void SaveSVGImg(string path,string imgPath)
        {
            var svgContent = File.ReadAllText(path);
            // 使用SvgDocument解析SVG内容
            SvgDocument svgDocument = SvgDocument.FromSvg<SvgDocument>(svgContent);

            // 将SvgDocument转换为Drawing对象
            System.Drawing.Bitmap bitmap = svgDocument.Draw();
            bitmap.Save(imgPath);
        }

        /// <summary>
        /// SVG转Bitmat然后再转为ImageSource
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static ImageSource ConvertSvgToDrawingImage(string path)
        {
            var svgContent = File.ReadAllText(path);
            // 使用SvgDocument解析SVG内容
            SvgDocument svgDocument = SvgDocument.FromSvg<SvgDocument>(svgContent);

            // 将SvgDocument转换为Drawing对象
            System.Drawing.Bitmap bitmap = svgDocument.Draw();
            var imageSource = ToImageSource(bitmap);
            return imageSource;
        }

        /// <summary>
        /// Bitmap转ImageSource
        /// </summary>
        /// <param name="hObject"></param>
        /// <returns></returns>
        [DllImport("gdi32.dll", SetLastError = true)]
        private static extern bool DeleteObject(IntPtr hObject);
        public static ImageSource ToImageSource( Bitmap bitmap)
        {
            IntPtr hBitmap = bitmap.GetHbitmap();
            ImageSource wpfBitmap = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
            // 记得要进行内存释放。否则会有内存不足的报错。
            if (!DeleteObject(hBitmap))
            {
                throw new Win32Exception();
            }
            return wpfBitmap;
        }
    }