Find and Replace Text without Losing Format in Presentation

Both methods follow these steps:

  • Open a presentation.
  • Search the text.
  • Replace the text.
  • Write the presentation.

VSTO


 private void findReplaceText(string strToFind, string strToReplaceWith)

{

//Open the presentation

PowerPoint.Presentation pres = null;

pres = Globals.ThisAddIn.Application.Presentations.Open("mytextone.ppt",

						  Microsoft.Office.Core.MsoTriState.msoFalse,

						  Microsoft.Office.Core.MsoTriState.msoFalse,

						  Microsoft.Office.Core.MsoTriState.msoFalse);

//Loop through slides

foreach (PowerPoint.Slide sld in pres.Slides)

	//Loop through all shapes in slide

	foreach (PowerPoint.Shape shp in sld.Shapes)

	{

		//Access text in the shape

		string str = shp.TextFrame.TextRange.Text;

		//Find text to replace

		if (str.Contains(strToFind))

		//Replace exisitng text with the new text

		{

			int idx = str.IndexOf(strToFind);

			string strStartText = str.Substring(0, idx);

			string strEndText = str.Substring(idx + strToFind.Length, str.Length - 1 - (idx + strToFind.Length - 1));

			shp.TextFrame.TextRange.Text = strStartText + strToReplaceWith + strEndText;

		}

		pres.SaveAs("MyTextOne___.ppt",

		PowerPoint.PpSaveAsFileType.ppSaveAsPresentation,

		Microsoft.Office.Core.MsoTriState.msoFalse);

	}

Aspose.Slides


 private static void findReplaceText(string strToFind, string strToReplaceWith)

{

	//Open the presentation

	Presentation pres = new Presentation("mytextone.ppt");

	//Get all text boxes in the presentation

	ITextBox[] tb = PresentationScanner.GetAllTextBoxes(pres, false);

	for (int i = 0; i < tb.Length; i++)

		foreach (Paragraph para in tb[i].Paragraphs)

			foreach (Portion port in para.Portions)

				//Find text to be replaced

				if (port.Text.Contains(strToFind))

				//Replace exisitng text with the new text

				{

					string str = port.Text;

					int idx = str.IndexOf(strToFind);

					string strStartText = str.Substring(0, idx);

					string strEndText = str.Substring(idx + strToFind.Length, str.Length - 1 - (idx + strToFind.Length - 1));

					port.Text = strStartText + strToReplaceWith + strEndText;

				}

	pres.Write("myTextOneAspose.ppt");

}

Download Sample Code

Creating a Table on PowerPoint Slide in VSTO and Aspose.Slides Format Text