Question

I am making an C# application from I create powerpoint presentations. I wish to apply theme to my presentation programatically. I have got the theme list using the following code. But how could I get to apply them on an active presentation?

String programfilesPath = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles);
String msOfficePath = "Microsoft Office\\Document Themes 14";
String fullPath = Path.Combine(programfilesPath, msOfficePath);
String[] fileEntries = Directory.GetFiles(fullPath, "*.thmx", SearchOption.TopDirectoryOnly);

Any idea how to proceed?

Answer 1

I just found a few good examples:

1. Create PowerPoint programmatically
2. Apply Theme PowerPoint 2010

When combining those two guides it all comes to this

using PowerPoint = Microsoft.Office.Interop.PowerPoint;
using Core = Microsoft.Office.Core;
// ...

// create application object
PowerPoint.Application pptApplication = new PowerPoint.Application();

PowerPoint.Slides slides;
PowerPoint._Slide slide;
PowerPoint.TextRange objText;

// Create the Presentation File
PowerPoint.Presentation pptPresentation = pptApplication.Presentations.Add(Core.MsoTriState.msoTrue);

// APPLY THEME - for example Clarity.thmx or 
// anything within Microsoft Office\Document Themes 14    
pptPresentation.ApplyTheme(@"C:\Program Files (x86)\Microsoft Office\Document Themes 14\Clarity.thmx");

PowerPoint.CustomLayout customLayout = pptPresentation.SlideMaster.CustomLayouts[PowerPoint.PpSlideLayout.ppLayoutText];

// Create new Slide
slides = pptPresentation.Slides;
slide = slides.AddSlide(1, customLayout);

// Add title, modify content and so on ...
objText = slide.Shapes[1].TextFrame.TextRange;
objText.Text = "hello world";
objText.Font.Name = "Verdana";

pptPresentation.SaveAs(@"c:\yourPPT.pptx", PowerPoint.PpSaveAsFileType.ppSaveAsDefault, Core.MsoTriState.msoTrue);

pptPresentation.Close();
pptApplication.Quit();
GC.Collect();