Find and Replace Text in PowerPoint Presentation using C#

readme.md

Read the complete article on finding and replacing text in PowerPoint presentations using C#: https://blog.aspose.com/2021/08/12/find-and-replace-text-in-powerpoint-using-csharp/

find-replace-text-in-PowerPoint.cs

// Load presentation
Presentation pres = new Presentation("mytextone.pptx");

string strToFind = "search string";
string strToReplaceWith = "replace string";

// Loop through each slide
foreach (Slide slide in pres.Slides)
{
    // Get all text frames in the slide
    ITextFrame[] tf = SlideUtil.GetAllTextBoxes(slide);

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

        foreach (Paragraph para in tf[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;

                }
}

// Save the presentation
pres.Save("myTextOneAspose.pptx", SaveFormat.Pptx);