// Returns all the external hyperlinks in the slides of a presentation.
public static System.Collections.Generic.IEnumerable <string> GetAllExternalHyperlinksInPresentation(string fileName)
{
// Declare a list of strings.
System.Collections.Generic.List <string> ret = new System.Collections.Generic.List <string>();
// Open the presentation file as read-only.
using (DocumentFormat.OpenXml.Packaging.PresentationDocument document = DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(fileName, false))
{
// Iterate through all the slide parts in the presentation part.
foreach (DocumentFormat.OpenXml.Packaging.SlidePart slidePart in document.PresentationPart.SlideParts)
{
System.Collections.Generic.IEnumerable <DocumentFormat.OpenXml.Drawing.HyperlinkType> links = slidePart.Slide.Descendants <DocumentFormat.OpenXml.Drawing.HyperlinkType>();
// Iterate through all the links in the slide part.
foreach (DocumentFormat.OpenXml.Drawing.HyperlinkType link in links)
{
// Iterate through all the external relationships in the slide part.
foreach (DocumentFormat.OpenXml.Packaging.HyperlinkRelationship relation in slidePart.HyperlinkRelationships)
{
// If the relationship ID matches the link ID…
if (relation.Id.Equals(link.Id))
{
// Add the URI of the external relationship to the list of strings.
ret.Add(relation.Uri.AbsoluteUri);
}
}
}
}
}
// Return the list of strings.
return(ret);
}
public static void GetSlideIdAndText(out string sldText, string docName, int index)
{
using (DocumentFormat.OpenXml.Packaging.PresentationDocument ppt = DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(docName, false))
{
// Get the relationship ID of the first slide.
DocumentFormat.OpenXml.Packaging.PresentationPart part = ppt.PresentationPart;
DocumentFormat.OpenXml.OpenXmlElementList slideIds = part.Presentation.SlideIdList.ChildElements;
string relId = (slideIds[index] as DocumentFormat.OpenXml.Presentation.SlideId).RelationshipId;
// Get the slide part from the relationship ID.
DocumentFormat.OpenXml.Packaging.SlidePart slide = (DocumentFormat.OpenXml.Packaging.SlidePart)part.GetPartById(relId);
// Build a StringBuilder object.
System.Text.StringBuilder paragraphText = new System.Text.StringBuilder();
// Get the inner text of the slide:
System.Collections.Generic.IEnumerable <DocumentFormat.OpenXml.Drawing.Text> texts = slide.Slide.Descendants <DocumentFormat.OpenXml.Drawing.Text>();
foreach (DocumentFormat.OpenXml.Drawing.Text text in texts)
{
paragraphText.Append(text.Text);
}
sldText = paragraphText.ToString();
}
}
// Get a list of the titles of all the slides in the presentation.
public static System.Collections.Generic.IList <string> GetSlideTitles(string presentationFile)
{
// Open the presentation as read-only.
using (DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument =
DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(presentationFile, false))
{
return(GetSlideTitles(presentationDocument));
}
}
public static int CountSlides(string presentationFile)
{
// Open the presentation as read-only.
using (DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument = DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(presentationFile, false))
{
// Pass the presentation to the next CountSlides method
// and return the slide count.
return(CountSlides(presentationDocument));
}
}
// Get all the text in a slide.
public static string[] GetAllTextInSlide(string presentationFile, int slideIndex)
{
// Open the presentation as read-only.
using (DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument = DocumentFormat.OpenXml.Packaging.PresentationDocument.Open(presentationFile, false))
{
// Pass the presentation and the slide index
// to the next GetAllTextInSlide method, and
// then return the array of strings it returns.
return(GetAllTextInSlide(presentationDocument, slideIndex));
}
}
public static string[] GetAllTextInSlide(DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument, int slideIndex)
{
// Verify that the presentation document exists.
if (presentationDocument == null)
{
throw new System.ArgumentNullException("presentationDocument");
}
// Verify that the slide index is not out of range.
if (slideIndex < 0)
{
throw new System.ArgumentOutOfRangeException("slideIndex");
}
// Get the presentation part of the presentation document.
DocumentFormat.OpenXml.Packaging.PresentationPart presentationPart = presentationDocument.PresentationPart;
// Verify that the presentation part and presentation exist.
if (presentationPart != null && presentationPart.Presentation != null)
{
// Get the Presentation object from the presentation part.
DocumentFormat.OpenXml.Presentation.Presentation presentation = presentationPart.Presentation;
// Verify that the slide ID list exists.
if (presentation.SlideIdList != null)
{
// Get the collection of slide IDs from the slide ID list.
DocumentFormat.OpenXml.OpenXmlElementList slideIds =
presentation.SlideIdList.ChildElements;
// If the slide ID is in range...
if (slideIndex < slideIds.Count)
{
// Get the relationship ID of the slide.
string slidePartRelationshipId = (slideIds[slideIndex] as DocumentFormat.OpenXml.Presentation.SlideId).RelationshipId;
// Get the specified slide part from the relationship ID.
DocumentFormat.OpenXml.Packaging.SlidePart slidePart =
(DocumentFormat.OpenXml.Packaging.SlidePart)presentationPart.GetPartById(slidePartRelationshipId);
// Pass the slide part to the next method, and
// then return the array of strings that method
// returns to the previous method.
return(GetAllTextInSlide(slidePart));
}
}
}
// Else, return null.
return(null);
}
// Count the slides in the presentation.
public static int CountSlides(DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument)
{
// Check for a null document object.
if (presentationDocument == null)
{
throw new System.ArgumentNullException("presentationDocument");
}
int slidesCount = 0;
// Get the presentation part of document.
DocumentFormat.OpenXml.Packaging.PresentationPart presentationPart = presentationDocument.PresentationPart;
// Get the slide count from the SlideParts.
if (presentationPart != null)
{
slidesCount = System.Linq.Enumerable.Count(presentationPart.SlideParts);
}
// Return the slide count to the previous method.
return(slidesCount);
}
// Get a list of the titles of all the slides in the presentation.
public static System.Collections.Generic.IList <string> GetSlideTitles(DocumentFormat.OpenXml.Packaging.PresentationDocument presentationDocument)
{
if (presentationDocument == null)
{
throw new System.ArgumentNullException("presentationDocument");
}
// Get a PresentationPart object from the PresentationDocument object.
DocumentFormat.OpenXml.Packaging.PresentationPart presentationPart = presentationDocument.PresentationPart;
if (presentationPart != null &&
presentationPart.Presentation != null)
{
// Get a Presentation object from the PresentationPart object.
DocumentFormat.OpenXml.Presentation.Presentation presentation = presentationPart.Presentation;
if (presentation.SlideIdList != null)
{
System.Collections.Generic.List <string> titlesList = new System.Collections.Generic.List <string>();
// Get the title of each slide in the slide order.
foreach (var slideId in presentation.SlideIdList.Elements <DocumentFormat.OpenXml.Presentation.SlideId>())
{
DocumentFormat.OpenXml.Packaging.SlidePart slidePart = presentationPart.GetPartById(slideId.RelationshipId) as DocumentFormat.OpenXml.Packaging.SlidePart;
// Get the slide title.
string title = GetSlideTitle(slidePart);
// An empty title can also be added.
titlesList.Add(title);
}
return(titlesList);
}
}
return(null);
}
