有谁知道如何在PowerPoint演示文稿(2010)中保存幻灯片的背景图像。这是我的代码的一部分,我试图清除幻灯片以获取背景图像,但这并不是理想的结果
PowerPoint.Presentation p = app.Presentations.Open(slidesContainerPath, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoFalse, Microsoft.Office.Core.MsoTriState.msoFalse);
        string imagename;
        foreach (PowerPoint.Slide s in p.Slides) {
            imagename = s.SlideIndex.ToString() + ".jpg";
            s.BackgroundStyle = Microsoft.Office.Core.MsoBackgroundStyleIndex.msoBackgroundStyleNotAPreset;
            foreach(Microsoft.Office.Interop.PowerPoint.Shape shape in s.Shapes)
            {
                shape.Delete();
            }                
            s.Export(imagesContainerPath + "\\" + imagename, "JPG");
        }
        if (p != null) {
            p.Close();
        }