Working with Find and Replace

5 Jan 202324 minutes to read

.NET PowerPoint library allows you to search for a particular text that you want to change and replace it with another text in the PowerPoint presentation.

You can replace either the first occurrence or all the occurrences of the text with another text in all PowerPoint slides and elements such as shape, textbox, table, smartart, etc.
You can replace the text in a specific slide, notes slide, master slide, or layout slide.
You can replace the text by matching the case, whole word, and all occurrences or the first occurrence alone.
You can also replace the content that spans across several lines.

Find and replace in PowerPoint presentation

You can find text in a PowerPoint presentation and replace it with other text.

The following code example illustrates how to find all occurrences of a particular text and replace it with other text in a PowerPoint presentation.

C#
VB.NET
UWP
ASP.NET Core
Xamarin
//Opens an existing presentation.
using (IPresentation pptxDoc = Presentation.Open("Sample.pptx"))
{
    //Finds all the occurrences of a particular text in the PowerPoint presentation
    ITextSelection[] textSelections = pptxDoc.FindAll("product", false, false);
    foreach (ITextSelection textSelection in textSelections)
    {
        //Gets the found text as a single text part
        ITextPart textPart = textSelection.GetAsOneTextPart();
        //Replaces the text
        textPart.Text = "Service";
    }
    //Saves the Presentation	
    pptxDoc.Save("Output.pptx");
}
'Opens an existing presentation.
Using pptxDoc As IPresentation = Presentation.Open("Sample.pptx")
    'Finds all the occurrences of a particular text in the PowerPoint presentation
    Dim textSelections As ITextSelection() = pptxDoc.FindAll("product", False, False)
    For Each textSelection As ITextSelection In textSelections
        'Gets the found text as a single text part
        Dim textPart As ITextPart = textSelection.GetAsOneTextPart()
        'Replaces the text
        textPart.Text = "Service"
    Next
    'Saves the Presentation	
    pptxDoc.Save("Output.pptx")
End Using
//Instantiates the FilePicker
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.SuggestedStartLocation = PickerLocationId.Desktop;
openPicker.FileTypeFilter.Add(".pptx");
//Creates a storage file from FileOpenPicker
StorageFile inputStorageFile = await openPicker.PickSingleFileAsync();
//Loads or opens a PowerPoint Presentation
IPresentation pptxDoc = await Presentation.OpenAsync(inputStorageFile);
//Finds all the occurrences of a particular text in the PowerPoint presentation
ITextSelection[] textSelections = pptxDoc.FindAll("product", false, false);
foreach (ITextSelection textSelection in textSelections)
{
    //Gets the found text as a single text part
    ITextPart textPart = textSelection.GetAsOneTextPart();
    //Replaces the text
    textPart.Text = "Service";
}
//Initializes FileSavePicker
FileSavePicker savePicker = new FileSavePicker();
savePicker.SuggestedStartLocation = PickerLocationId.Desktop;
savePicker.SuggestedFileName = "Output";
savePicker.FileTypeChoices.Add("PowerPoint Files", new List<string>() { ".pptx" });
//Creates a storage file from FileSavePicker
StorageFile storageFile = await savePicker.PickSaveFileAsync();
//Saves changes to the specified storage file
await pptxDoc.SaveAsync(storageFile);
//Opens an existing presentation.           
FileStream inputStream = new FileStream("Sample.pptx", FileMode.Open);
using (IPresentation pptxDoc = Presentation.Open(inputStream))
{
    //Finds all the occurrences of a particular text in the PowerPoint presentation
    ITextSelection[] textSelections = pptxDoc.FindAll("product", false, false);
    foreach (ITextSelection textSelection in textSelections)
    {
        //Gets the found text as a single text part
        ITextPart textPart = textSelection.GetAsOneTextPart();
        //Replaces the text
        textPart.Text = "Service";
    }
    //Saves the PowerPoint Presentation as a stream
    FileStream outputStream = new FileStream("Output.pptx", FileMode.Create);
    pptxDoc.Save(outputStream);
    //Releases all resources of the stream
    outputStream.Dispose();
    //Closes the Presentation instance
    pptxDoc.Close();
}
//"App" is the class of Portable project.
Assembly assembly = typeof(App).GetTypeInfo().Assembly;
Stream inputStream = assembly.GetManifestResourceStream("SampleBrowser.Presentation.Samples.Template.Sample.pptx");
//Loads or opens a PowerPoint Presentation
IPresentation pptxDoc = Presentation.Open(inputStream);
//Finds all the occurrences of a particular text in the PowerPoint presentation
ITextSelection[] textSelections = pptxDoc.FindAll("product", false, false);
foreach (ITextSelection textSelection in textSelections)
{
    //Gets the found text as a single text part
    ITextPart textPart = textSelection.GetAsOneTextPart();
    //Replaces the text
    textPart.Text = "Service";
}
//Creates a new memory stream to save a Presentation.
MemoryStream stream = new MemoryStream();
//Saves Presentation in stream format.
pptxDoc.Save(stream);
//Closes the presentation
pptxDoc.Close();
stream.Position = 0;
//The operation in Save under Xamarin varies between Windows Phone, Android and iOS platforms. Please refer presentation/xamarin section for respective code samples.
if (Device.OS == TargetPlatform.WinPhone || Device.OS == TargetPlatform.Windows)
    Xamarin.Forms.DependencyService.Get<ISaveWindowsPhone>().Save("Output.pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation", stream);
else
    Xamarin.Forms.DependencyService.Get<ISave>().Save("Output.pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation", stream);