CODEWITHSUNDEEP
c#powerpointslideshow
John Evans Solachuk
John Evans Solachuk

Reputation: 2105

Why doesn't Powerpoint's Slide Show view show the latest changes made on a Master layout shape's text property?

Background

I have a countdown timer created with 2 shapes in a custom layout slide in Master layout. The first one, pieShape, is created using the Powerpoint's Pie shape and the second one, ovalShape, is created using the Oval shape.

enter image description here

I have a piece of code in my VSTO C# add-in that regularly updates the pieShape.Adjustments[2] property and ovalShape.TextFrame2.TextFrange.Text property every 1 second using a System.Windows.Forms.Timer class. Changes in ovalShape.TextFrame2.TextFrange.Text should cause a number to change

Problem

The changes in ovalShape.TextFrame2.TextFrange.Text is not reflected in slideshow view e.g., only pieShape is updated, not ovalShape. However, it is reflected outside of slideshow view.

How the timer behaves when viewing in SlideShow view. (Only pieShape is updated) enter image description here

How the timer behaves when viewing outside of SlideShow. (Correct behaviour) enter image description here

Why doesn't Powerpoint's Slide Show view show the latest changes made on a shape's text property whereby the shape is created on a layout in Master layout?

Other notes

  1. If I put ovalShape and pieShape onto the slide itself (not in any Custom Layout), this problem does not happen.

  2. Code to update ovalShape.TextFrame2.TextFrange.Text

     //atimer extends System.Windows.Forms.Timer
 //it has a property called ticking that stores the current second

 ovalShape.TextFrame2.TextRange.Text = atimer.ticking.ToString();

Upvotes: 0

Views: 122

Answers (1)

Steve Rindsberg
Steve Rindsberg

Reputation: 14809

PowerPoint is unreliable about refreshing the SlideShow view when you make changes to slides/masters during a presentation.

Sometimes it's enough to do a .View.GoToSlide(x) where x is the SlideIndex of the current slide.

When that doesn't work, it can help to add a shape on or off slide then delete it. It might also help to do the gotoslide trick after adding the shape and again after deleting it.

Upvotes: 0

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