Change text in Powerpoint keeping style in c#

[cpieretParticipant]

Hi Guys,

I just started playing with this SDK today.

I want in my job to generate automatically powerpoint presentation for business intelligence reports.

I struggled to change some text in a powerpoint presentation keeping the style in C#.

I just want to share it here as I found so many topics on stack overflow etc… without any answers :

This code might be optimized as I know in advance the ID of the slide ( I put as a parameter in my method) and use ChildElement[0] hard coded ( a for loop and checking the type = DocumentFormat.OpenXml.Drawing.RunProperties night do the trick )

 private void replaceTextInSlide (PresentationPart presPart, int slideID, string oldText, string newText)
        {
            Presentation presentation = presPart.Presentation;            
            if (presentation.SlideIdList != null)
            {
                // Get the collection of slide IDs from the slide ID list.
                var slideIds = presentation.SlideIdList.ChildElements;
                string slidePartRelationshipId = (slideIds[slideID] as SlideId).RelationshipId;
                SlidePart slidePart = (SlidePart)presPart.GetPartById(slidePartRelationshipId);
                foreach (var paragraph in slidePart.Slide.Descendants<DocumentFormat.OpenXml.Drawing.Paragraph>())
                {
                    if (paragraph.InnerText.Contains(oldText))
                    {
                        string newString = paragraph.InnerText;
                        newString = newString.Replace(oldText, newText);
                        foreach (var child in paragraph.ChildElements)
                        {
                            if (child.InnerText.Equals(oldText))
                            {
                                DocumentFormat.OpenXml.Drawing.RunProperties styleRun = (DocumentFormat.OpenXml.Drawing.RunProperties)child.ChildElements[0].Clone();
                                child.RemoveAllChildren();
                                child.Append(styleRun);
                                child.Append(new DocumentFormat.OpenXml.Drawing.Text(newString));
                            }
                        }
                    }
                }
            }
            
        }

• This topic was modified 7 years, 10 months ago by  cpieret. Reason: remove one useless line of code

[Eric WhiteKeymaster]

Hi,

Sorry for the slow response – was on vacation, traveling, other issues…

Please check out this blog post and video:

Generate Open XML Presentations using a Presentation Template

It presents my recommended approach for generating presentations from a template.

Cheers, Eric

[Author]

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