# Find and Replace Text Across a Deck > Replace literal and regular-expression matches across slides, groups, tables, masters and notes. Source: https://docs.aspose.com/slides/net/examples/fonts-text/find-replace/ Updated: 2026-10-31 Replace literal and regular-expression matches across slides, groups, tables, masters and notes. ## Download and run Download [the complete project](example.zip) and open **Example.sln** in a compatible IDE. Automatic NuGet restore should run when it opens. The project accepts supported installed release SDKs instead of requiring one exact patch. [Setup and supported environments](/slides/net/examples/getting-started/) explains native libraries, fonts and the SDK/runtime distinction. ```text dotnet run --project Example.csproj -- --mode evaluation ``` Evaluation mode needs no license and retains the SDK watermark/text limits. For full licensed checks, set ASPOSE_LICENSE_PATH to your authorized license and use --mode licensed. Fonts and synthetic fixtures needed by this recipe are included or acquired as documented. The supplied bootstrap prepares a separate output workspace and prints its absolute path. The complete download includes that bootstrap, solution and editor profiles; the C# block below is Program.cs from the same archive. ## Input and prerequisites Use a supported .NET SDK with the supplied project. Evaluation mode runs without a license; licensed mode requires your own authorized license covering this release. No license is distributed. All presentation input is created by the code from original synthetic data. [Download the complete project](example.zip), including code, solution, project and required helpers. Normal package restore is supported. ## Example An application-owned traversal selects the text frames to process. Replacement operates on each full frame, so a literal match can span text runs. This fixture includes a run-spanning match, grouped shape, table cell, master text, speaker notes and unrelated styled text. Notes are explicitly included. ```csharp using System.Threading.Tasks; using System; using System.Collections.Generic; using System.Drawing; using System.IO; using System.IO.Compression; using System.Linq; using System.Net.Http; using System.Security.Cryptography; using System.Security.Cryptography.X509Certificates; using System.Text; using System.Text.Json; using System.Text.RegularExpressions; using Aspose.Slides; using Aspose.Slides.Export; using Aspose.Slides.Warnings; internal static class Program { private static ExampleContext Context = null!; private static Task Main(string[] args) => ExampleBootstrap.RunAsync(args, async context => { Context = context; context.BeginAction("fonts-text/find-replace/block-001"); RunExample(); await Task.CompletedTask; context.Pass("fonts-text/find-replace/block-001", "recipe semantic assertions", "source inputs preserved", "documented output generated"); }); private static IEnumerable Frames(IShapeCollection shapes) { foreach (var shape in shapes) { if (shape is IAutoShape auto && auto.TextFrame != null) yield return auto.TextFrame; if (shape is IGroupShape group) foreach (var frame in Frames(group.Shapes)) yield return frame; if (shape is ITable table) for (int row = 0; row < table.Rows.Count; row++) for (int column = 0; column < table.Columns.Count; column++) yield return table[column, row].TextFrame; } } private static IEnumerable AllFrames(Presentation p) { foreach (var slide in p.Slides) { foreach (var frame in Frames(slide.Shapes)) yield return frame; if (slide.NotesSlideManager.NotesSlide?.NotesTextFrame is ITextFrame notes) yield return notes; } foreach (var master in p.Masters) foreach (var frame in Frames(master.Shapes)) yield return frame; } private static void RunExample() { using (var source = new Presentation()) { source.SlideSize.SetSize(640, 360, SlideSizeScaleType.DoNotScale); var split = Label(source.Slides[0], ""); split.TextFrame.Paragraphs.Clear(); var paragraph = new Paragraph(); paragraph.Portions.Add(new Portion("OL")); paragraph.Portions.Add(new Portion("D 2025")); paragraph.Portions[0].PortionFormat.FontBold = NullableBool.True; split.TextFrame.Paragraphs.Add(paragraph); var group = source.Slides[0].Shapes.AddGroupShape(); var grouped = group.Shapes.AddAutoShape(ShapeType.Rectangle, 40, 155, 200, 40); grouped.TextFrame.Text = "OLD 2025"; var table = source.Slides[0].Shapes.AddTable(300, 155, new[] { 250.0 }, new[] { 40.0 }); table[0, 0].TextFrame.Text = "OLD 2025"; var masterText = Label(source.Masters[0], "OLD 2025", 310); masterText.Height = 40; source.Slides[0].NotesSlideManager.AddNotesSlide().NotesTextFrame.Text = "OLD 2025"; var keep = Label(source.Slides[0], "Keep this", 210); keep.Name = "keep"; keep.TextFrame.Paragraphs[0].Portions[0].PortionFormat.FontBold = NullableBool.True; source.Save("input.pptx", SaveFormat.Pptx); } string originalHash = Hash("input.pptx"); using (var editable = new Presentation("input.pptx")) { var options = new TextSearchOptions { CaseSensitive = true }; foreach (var frame in AllFrames(editable)) { frame.ReplaceText("OLD", "NEW", options, null); frame.ReplaceRegex(new Regex(@"\b2025\b"), "2026", null); } Require(AllFrames(editable).Count(f => f.Text == Context.ExpectedText("NEW 2026")) == 5, "A target location was missed."); string beforeNoMatch = string.Join("|", AllFrames(editable).Select(f => f.Text)); foreach (var frame in AllFrames(editable)) frame.ReplaceText("NO-SUCH-MARKER", "ignored", options, null); Require(beforeNoMatch == string.Join("|", AllFrames(editable).Select(f => f.Text)), "No-match replacement changed text."); editable.Save("output.pptx", SaveFormat.Pptx); } using (var result = new Presentation("output.pptx")) { Require(AllFrames(result).Count(f => f.Text == Context.ExpectedText("NEW 2026")) == 5, "Changes were not saved."); var keep = result.Slides[0].Shapes.OfType().Single(s => s.Name == "keep"); Require(keep.TextFrame.Text == Context.ExpectedText("Keep this") && keep.TextFrame.Paragraphs[0].Portions[0].PortionFormat.FontBold == NullableBool.True, "Unrelated text/format changed."); Render(result.Slides[0], "preview.png"); } Require(SavedText("output.pptx").Count(text => text == "NEW 2026") == 5, "Persisted replacement targets differ."); Require(!SavedText("output.pptx").Any(text => text.Contains("OLD", StringComparison.Ordinal) || text.Contains("2025", StringComparison.Ordinal)), "Persisted original marker remains."); Require(Hash("input.pptx") == originalHash, "Original changed."); Report(new { target_frames = 5, literal_and_regex = true, run_spanning = true, unrelated_format_retained = true, no_match_unchanged = true, original_unchanged = true }); } private static void Require(bool condition, string message) { if (!condition) throw new InvalidOperationException(message); } private static IAutoShape Label(IBaseSlide slide, string text, float y = 50) { var shape = slide.Shapes.AddAutoShape(ShapeType.Rectangle, 40, y, 560, 90); shape.TextFrame.Text = text; shape.TextFrame.Paragraphs[0].Portions[0].PortionFormat.FontHeight = 24; return shape; } private static string Hash(string path) => Convert.ToHexString(SHA256.HashData(File.ReadAllBytes(path))).ToLowerInvariant(); private static void Report(object checks) { string json = JsonSerializer.Serialize(new { checks }, new JsonSerializerOptions { WriteIndented = true }); File.WriteAllText("result.json", json); Console.WriteLine(json); } private static void Render(ISlide slide, string output) { using var image = slide.GetImage(new Size(640, 360)); image.Save(output, Aspose.Slides.ImageFormat.Png); } // Inspect persisted OOXML independently; evaluation text getters remain explicitly limited. private static string[] SavedText(string file) { using var archive = ZipFile.OpenRead(file); System.Xml.Linq.XNamespace drawing = "http://schemas.openxmlformats.org/drawingml/2006/main"; return archive.Entries.Where(entry => entry.FullName.StartsWith("ppt/", StringComparison.Ordinal) && entry.FullName.EndsWith(".xml", StringComparison.Ordinal)) .SelectMany(entry => { using var stream = entry.Open(); return System.Xml.Linq.XDocument.Load(stream, System.Xml.Linq.LoadOptions.PreserveWhitespace).Descendants(drawing + "p").Select(paragraph => string.Concat(paragraph.Descendants(drawing + "t").Select(node => node.Value))).ToArray(); }).ToArray(); } } ``` ## Run and inspect the result Extract the download into an empty directory and run: ```text dotnet restore Example.sln dotnet run --project Example.csproj --configuration Release --no-restore -- --mode evaluation -- --mode evaluation -- --mode evaluation ``` The code writes "input.pptx", "output.pptx", "preview.png", plus "result.json". Checks stop execution on an unexpected result; inspect visual outputs as well as the recorded data. ## Practical limits The traversal below covers the demonstrated shapes, groups, tables, masters and notes. Additional object types such as SmartArt require their own text traversal. Choose note/master participation deliberately. A match spanning differently formatted runs may inherit formatting from part of the original; inspect the result when formatting boundaries matter. Read the [detailed guide](/slides/net/search-and-replace-text/) for the full API and platform requirements.