OpenXML- Set a slide layout for a slide in presentation - powerpoint

Question

Here is the code i used to create the presentation.
What i'm trying here is to create a slide and insert shapes into it and attach the slide into already created presentation. That works fine.
My question is how i set the layout the of the inserted slide. what i mean slide layout here is
slideLayoutpart.SlideLayout = new SlideLayout() {
Type = SlideLayoutValues.VerticalTitleAndText
};
I want to set this layout to my Slide.
I had looked working with slidelayout HERE
Slide slide = new Slide(new CommonSlideData(new ShapeTree()));
uint drawingObjectId = 1;
// Construct the slide content.
// Specify the non-visual properties of the new slide.
NonVisualGroupShapeProperties nonVisualProperties = slide.CommonSlideData.ShapeTree.AppendChild(new NonVisualGroupShapeProperties());
nonVisualProperties.NonVisualDrawingProperties = new NonVisualDrawingProperties() { Id = 1, Name = "" };
nonVisualProperties.NonVisualGroupShapeDrawingProperties = new NonVisualGroupShapeDrawingProperties();
nonVisualProperties.ApplicationNonVisualDrawingProperties = new ApplicationNonVisualDrawingProperties();
// Specify the group shape properties of the new slide.
slide.CommonSlideData.ShapeTree.AppendChild(new GroupShapeProperties());
// Declare and instantiate the title shape of the new slide. TITLE SHAPE
Shape titleShape = slide.CommonSlideData.ShapeTree.AppendChild(new Shape());
drawingObjectId++;
// Specify the required shape properties for the title shape.
NonVisualShapeProperties nonVisualShapeProperties2;
ShapeProperties shapeProperties2;
CreateVisualProperties(out nonVisualShapeProperties2, out shapeProperties2,
PlaceholderValues.Title, drawingObjectId);
// Specify the text of the title shape.
TextBody titletextBody = CreateContent(slideTitle, PlaceholderValues.Title);
titleShape.Append(nonVisualShapeProperties2);
titleShape.Append(shapeProperties2);
titleShape.Append(titletextBody);
// Save the new slide part.
slide.Save(slidePart);
#region Slide Poistioning
// The slide ID list should not be null.
SlideIdList slideIdList = presentationPart.Presentation.SlideIdList;
// Find the highest slide ID in the current list.
uint maxSlideId = 1;
SlideId prevSlideId = null;
foreach (SlideId slideId in slideIdList.ChildElements)
{
if (slideId.Id > maxSlideId)
{
maxSlideId = slideId.Id;
}
position--;
if (position == 0)
{
prevSlideId = slideId;
}
}
maxSlideId++;
// Get the ID of the previous slide.
SlidePart lastSlidePart;
if (prevSlideId != null)
{
//Changed to set first thing as layout
// lastSlidePart = (SlidePart)presentationPart.GetPartById(((SlideId)(slideIdList.ChildElements[0])).RelationshipId);
lastSlidePart = (SlidePart)presentationPart.GetPartById(prevSlideId.RelationshipId);
}
else
{
lastSlidePart = (SlidePart)presentationPart.GetPartById(((SlideId)(slideIdList.ChildElements[0])).RelationshipId);
}
// Use the same slide LAYOUT HERE as that of the previous slide.
if (null != lastSlidePart.SlideLayoutPart)
{
SlideLayoutPart slideLayoutpartNew = lastSlidePart.SlideLayoutPart;
slideLayoutpartNew.AddNewPart<SlideMasterPart>();
slideLayoutpartNew.SlideLayout = new SlideLayout() { Type = SlideLayoutValues.VerticalTitleAndText };
slidePart.AddPart(slideLayoutpartNew);
slidePart.AddPart(slideLayoutPart);
//When i try to set lastslidelayout it works fine.
//slidePart.AddPart(lastSlidePart.SlideLayoutPart);
}
// Insert the new slide into the slide list after the previous slide.
SlideId newSlideId = slideIdList.InsertAfter(new SlideId(), prevSlideId);
newSlideId.Id = maxSlideId;
newSlideId.RelationshipId = presentationPart.GetIdOfPart(slidePart);
#endregion
// Save the modified presentation.
presentationPart.Presentation.Save();

Answer 1

I figured out ,How to set layout
string layoutName = "Title and Content";
// Get SlideMasterPart and SlideLayoutPart from the existing Presentation Part
SlideMasterPart slideMasterPart = presentationPart.SlideMasterParts.First();
SlideLayoutPart slideLayoutPart = slideMasterPart.SlideLayoutParts.SingleOrDefault
(sl => sl.SlideLayout.CommonSlideData.Name.Value.Equals(layoutName, StringComparison.OrdinalIgnoreCase));
if (slideLayoutPart == null)
{
throw new Exception("The slide layout " + layoutName + " is not found");
}
slidePart.AddPart<SlideLayoutPart>(slideLayoutPart);
I'm here appending the layout to slidepart and will save the presentation