static void Main(string[] args)
{
//Instantiate Presentation class that represents the presentation file
using (Presentation p = new Presentation("Test.pptx"))
{
// Try to search by layout slide type
IMasterLayoutSlideCollection layoutSlides = p.Masters[0].LayoutSlides;
ILayoutSlide layoutSlide =
layoutSlides.GetByType(SlideLayoutType.TitleAndObject) ??
layoutSlides.GetByType(SlideLayoutType.Title);
if (layoutSlide == null)
{
// The situation when a presentation doesn't contain some type of layouts.
// Technographics.pptx presentation only contains Blank and Custom layout types.
// But layout slides with Custom types has different slide names,
// like "Title", "Title and Content", etc. And it is possible to use these
// names for layout slide selection.
// Also it is possible to use the set of placeholder shape types. For example,
// Title slide should have only Title pleceholder type, etc.
foreach (ILayoutSlide titleAndObjectLayoutSlide in layoutSlides)
{
if (titleAndObjectLayoutSlide.Name == "Title and Object")
{
layoutSlide = titleAndObjectLayoutSlide;
break;
}
}
if (layoutSlide == null)
{
foreach (ILayoutSlide titleLayoutSlide in layoutSlides)
{
if (titleLayoutSlide.Name == "Title")
{
layoutSlide = titleLayoutSlide;
break;
}
}
if (layoutSlide == null)
{
layoutSlide = layoutSlides.GetByType(SlideLayoutType.Blank);
if (layoutSlide == null)
{
layoutSlide = layoutSlides.Add(SlideLayoutType.TitleAndObject, "Title and Object");
}
}
}
}
//Adding empty slide with added layout slide
p.Slides.InsertEmptySlide(0, layoutSlide);
//Save presentation
p.Save("Output.pptx", SaveFormat.Pptx);
}
}
}