Extract text from Microsoft Office PowerPoint presentations
To extract a text from Microsoft Office PowerPoint presentations GetText and GetText(pageIndex) method is used. These methods allow to extract a text from the entire presentation or a text from the selected slide.
Here are the steps to extract a text from Microsoft Office PowerPoint presentations:
- Instantiate Parser object for the initial presentation;
- Call GetText method and obtain TextReader object;
- Read a text from reader.
The following example demonstrates how to extract a text from Microsoft Office PowerPoint presentation:
// Create an instance of Parser class
using(Parser parser = new Parser(filePath))
{
// Extract a text into the reader
using(TextReader reader = parser.GetText())
{
// Print a text from the presentation
Console.WriteLine(reader.ReadToEnd());
}
}
Here are the steps to extract a text from the sheet of Microsoft Office PowerPoint presentation:
- Instantiate Parser object for the initial presentation;
- Call GetDocumentInfo method and obtain IDocumentInfo object with page count;
- Call GetText(pageIndex) method with the sheet index and obtain TextReader object;
- Read a text from reader.
The following example demonstrates how to extract a text from the slide of Microsoft Office PowerPoint presentation:
// Create an instance of Parser class
using(Parser parser = new Parser(filePath))
{
// Get the document info
IDocumentInfo documentInfo = parser.GetDocumentInfo();
// Iterate over slides
for(int p = 0; p < documentInfo.PageCount; p++)
{
// Print a page number
Console.WriteLine(string.Format("Slide {0}/{1}", p + 1, documentInfo.PageCount));
// Extract a text into the reader
using(TextReader reader = parser.GetText(p))
{
// Print a text from the presentation slide
Console.WriteLine(reader.ReadToEnd());
}
}
}
Raw mode allows to increase the speed of text extraction due to poor formatting accuracy. GetText(TextOptions) and GetText(pageIndex, TextOptions) methods are used to extract a text in raw mode.
Here are the steps to extract a raw text from the sheet of Microsoft Office PowerPoint presentation:
- Instantiate Parser object for the initial presentation;
- Instantiate TextOptions object with true parameter;
- Call GetDocumentInfo method;
- Use RawPageCount instead of PageCount to avoid extra calculations;
- Call GetText(pageIndex, TextOptions) method with the sheet index and obtain TextReader object;
- Read a text from reader.
The following example demonstrates how to extract a raw text from the slide of Microsoft Office PowerPoint presentation:
// Create an instance of Parser class
using (Parser parser = new Parser(filePath))
{
// Get the document info
IDocumentInfo documentInfo = parser.GetDocumentInfo();
// Check if the document has slides
if (documentInfo == null || documentInfo.RawPageCount == 0)
{
Console.WriteLine("Document hasn't pages.");
return;
}
// Iterate over slides
for (int p = 0; p < documentInfo.RawPageCount; p++)
{
// Print a slide number
Console.WriteLine(string.Format("Slide {0}/{1}", p + 1, documentInfo.RawPageCount));
// Extract a text into the reader
using (TextReader reader = parser.GetText(p, new TextOptions(true)))
{
// Print a text from the presentation slide
Console.WriteLine(reader.ReadToEnd());
}
}
}
GroupDocs.Parser also allows to extract a text from Microsoft Office PowerPoint presentations as HTML, Markdown and formatted plain text. For more details, see Extract Formatted Text.
Here are the steps to extract a text from Microsoft Office PowerPoint presentation as HTML:
- Instantiate Parser object for the initial presentation;
- Call GetFormattedText method and obtain TextReader object;
- Read a text from reader.
The following example shows how to extract a text from Microsoft Office PowerPoint presentation as HTML:
// Create an instance of Parser class
using (Parser parser = new Parser(filePath))
{
// Extract a formatted text into the reader
using (TextReader reader = parser.GetFormattedText(new FormattedTextOptions(FormattedTextMode.Html)))
{
// Print a formatted text from the presentation
Console.WriteLine(reader.ReadToEnd());
}
}
More resources
GitHub examples
You may easily run the code above and see the feature in action in our GitHub examples:
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