Find and replace text in PowerPoint slides in C# and VB.NET

With the GemBox.Presentation library, you can find text using a string or a regular expression and replace it with new content, as shown in the following example.

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using GemBox.Presentation;
using System.Linq;

class Program
{
    static void Main()
    {
        // If using the Professional version, put your serial key below.
        ComponentInfo.SetLicense("FREE-LIMITED-KEY");

        var presentation = PresentationDocument.Load("%#FindAndReplace.pptx%");

        var slide = presentation.Slides[0];

        slide.TextContent.Replace("companyName", "Acme Corporation");

        var items = new string[][]
        {
            new string[] { "January",  "$14.2M", "$1.6M", "$12.5M", "$2.3M" },
            new string[] { "February", "$15.2M", "$0.6M", "$11.3M", "$4.3M" },
            new string[] { "March",    "$17.2M", "$0M",   "$12.1M", "$52.3M" },
            new string[] { "April",    "$7.2M",  "$1.6M", "$7.2M",  "$0M" },
            new string[] { "May",      "$3.2M",  "$1.6M", "$0M",    "$3.2M" }
        };

        var table = slide.Content.Drawings.OfType<GraphicFrame>().First().Table;

        // Clone the row with custom text tags (e.g. '@month', '@revenue', etc.).
        for (int i = 0; i < items.Length - 1; i++)
            table.Rows.AddClone(table.Rows[1]);

        // Replace custom text tags with data.
        for (int i = 0; i < items.Length; i++)
        {
            var row = table.Rows[i + 1];
            var item = items[i];
            row.TextContent.Replace("@month", item[0]);
            row.TextContent.Replace("@revenue", item[1]);
            row.TextContent.Replace("@cashExpense", item[2]);
            row.TextContent.Replace("@operatingIncome", item[3]);
            row.TextContent.Replace("@operatingExpense", item[4]);
        }

        // Find all text content with "0M" value in the table.
        var zeroValueRanges = table.TextContent.Find("0M");

        presentation.Save("Find And Replace.%OutputFileType%");
    }
}

Imports GemBox.Presentation
Imports System.Linq

Module Program

    Sub Main()

        ' If using the Professional version, put your serial key below.
        ComponentInfo.SetLicense("FREE-LIMITED-KEY")

        Dim presentation = PresentationDocument.Load("%#FindAndReplace.pptx%")

        Dim slide = presentation.Slides(0)

        slide.TextContent.Replace("companyName", "Acme Corporation")

        Dim items As String()() = 
        {
            new String() {"January",  "$14.2M", "$1.6M", "$12.5M", "$2.3M"},
            new String() {"February", "$15.2M", "$0.6M", "$11.3M", "$4.3M"},
            new String() {"March",    "$17.2M", "$0M",   "$12.1M", "$52.3M"},
            new String() {"April",    "$7.2M",  "$1.6M", "$7.2M",  "$0M"},
            new String() {"May",      "$3.2M",  "$1.6M", "$0M",    "$3.2M"}
        }

        Dim table = slide.Content.Drawings.OfType(Of GraphicFrame).First().Table

        ' Clone the row with custom text tags (e.g. '@month', '@revenue', etc.).
        For  i = 0 to items.Length - 2
            table.Rows.AddClone(table.Rows(1))
        Next

        ' Replace custom text tags with data.
        for i = 0 to items.Length - 1
            Dim row = table.Rows(i + 1)
            Dim item = items(i)
            row.TextContent.Replace("@month", item(0))
            row.TextContent.Replace("@revenue", item(1))
            row.TextContent.Replace("@cashExpense", item(2))
            row.TextContent.Replace("@operatingIncome", item(3))
            row.TextContent.Replace("@operatingExpense", item(4))
        Next

        ' Find all text content with "0M" value in the table.
        Dim zeroValueRanges = table.TextContent.Find("0M")

        presentation.Save("Find And Replace.%OutputFileType%")
    End Sub
End Module
PowerPoint slide with the replaced text
Screenshot of a PowerPoint slide whose text was replaced programmatically

The text content of a presentation document is represented with by the TextRange class, which is exposed on the following content model classes:

You can also use the TextRange class to achieve the following tasks:

See also

Convert PowerPoint files to PDF in C# and VB.NET

Convert PowerPoint files to PDF in C# and VB.NET

Next steps

GemBox.Presentation is a .NET component that enables you to read, write, edit, convert, and print presentation files from your .NET applications using one simple API.

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