C# Find and Replace Text in OneNote file Programmatically in .NET

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find-replace-text-onenote-all-pages.cs

// Specify search and replace string
Dictionary<string, string> replacements = new Dictionary<string, string>();
replacements.Add("2. Get organized", "New Text Here");

// Load the document into Aspose.Note.
Document oneFile = new Document(dataDir + "Aspose.one");

// Get all RichText nodes
IList<RichText> textNodes = oneFile.GetChildNodes<RichText>();

foreach (RichText richText in textNodes)
{
    foreach (KeyValuePair<string, string> kvp in replacements)
    {
        if (richText != null && richText.Text.Contains(kvp.Key))
        {
            // Replace text of a shape
            richText.Text = richText.Text.Replace(kvp.Key, kvp.Value);
        }
    }
}

// Save updated one note file
oneFile.Save(dataDir + "ReplaceTextOnAllPages.one" , SaveFormat.One);

find-replace-text-onenote-specific-page.cs

// Specify find and replace text
Dictionary<string, string> replacements = new Dictionary<string, string>();
replacements.Add("voice over", "voice over new text");

// Load the document into Aspose.Note.
Document oneFile = new Document(dataDir + "Aspose.one");

IList<Page> pageNodes = oneFile.GetChildNodes<Page>();

// Get all RichText nodes
IList<RichText> textNodes = pageNodes[0].GetChildNodes<RichText>();

foreach (RichText richText in textNodes)
{
    foreach (KeyValuePair<string, string> kvp in replacements)
    {
        if (richText != null && richText.Text.Contains(kvp.Key))
        {
            // Replace text of a shape
            richText.Text = richText.Text.Replace(kvp.Key, kvp.Value);
        }
    }
}

// Save to any supported file format
oneFile.Save(dataDir + "ReplaceTextOnParticularPage.one", SaveFormat.One);