How to add watermark to specific page in a Word document?

Syncfusion® Essential® DocIO is a .NET Word library used to create, read, edit, and convert Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can add watermark to specific page in a Word document using C#.

A watermark can be added to a specific page in Microsoft Word using the Insert at Current Document Position option. This involves adding a content control with a text box and setting the wrapping style to Behind Text. In DocIO, you can achieve this by inserting content controls with text boxes and adjusting their wrapping style, size, and position.

Steps to add watermark to specific page in a Word document:

1. Create a new .NET Core console application project.
   
   
2. Install the Syncfusion.DocIO.Net.Core NuGet package as a reference to your project from NuGet.org.
   
   

3. Include the following namespaces in Program.cs file
   C#

using Syncfusion.DocIO.DLS;
using Syncfusion.DocIO; 

4. Use the following code example to add watermark to specific page in a Word document.
   C#

// Open the Word document file for reading
using (FileStream docStream = new FileStream(Path.GetFullPath(@"Data/Template.docx"), FileMode.Open, FileAccess.Read))
{
   // Load the document into the WordDocument object
   using (WordDocument document = new WordDocument(docStream, FormatType.Docx))
   {
       // Retrieve all sections in the document
       List<Entity> sections = document.FindAllItemsByProperty(EntityType.Section, null, null);
       // Add "Syncfusion" watermark to the first section
       AddWatermarkToPage(sections[0] as WSection, "Adventures");
       // Add "Draft" watermark to the second section
       AddWatermarkToPage(sections[1] as WSection, "Pandas");
       // Save the modified document to a new file
       using (FileStream docStream1 = new FileStream(Path.GetFullPath(@"Output/Result.docx"), FileMode.Create, FileAccess.Write))
       {
           document.Save(docStream1, FormatType.Docx);
       }
   }
}

5. Use the following code example to add a watermark in the specific section.
   C#

static void AddWatermarkToPage(IWSection section, string watermarkText)
{
   // Access the body of the specified section
   WTextBody textBody = section.Body;
   // Adds a block content control (RichText) to the section
   BlockContentControl blockContentControl = textBody.AddBlockContentControl(ContentControlType.RichText) as BlockContentControl;

   // Adds a new paragraph inside the block content control
   WParagraph paragraph = blockContentControl.TextBody.AddParagraph() as WParagraph;
   // Create a  text box to hold the watermark text
   WTextBox watermarkTextBox = paragraph.AppendTextBox(494, 164) as WTextBox;
   // Center-align the text box horizontally
   watermarkTextBox.TextBoxFormat.HorizontalAlignment = ShapeHorizontalAlignment.Center;
   // Center-align the text box vertically
   watermarkTextBox.TextBoxFormat.VerticalAlignment = ShapeVerticalAlignment.Center;
   // Remove the border line of the text box
   watermarkTextBox.TextBoxFormat.NoLine = true;
   // Set rotation angle for the watermark text box
   watermarkTextBox.TextBoxFormat.Rotation = 315;
   // Allow overlapping of the text box with other elements
   watermarkTextBox.TextBoxFormat.AllowOverlap = true;
   // Align the text box relative to the page margins
   watermarkTextBox.TextBoxFormat.HorizontalOrigin = HorizontalOrigin.Margin;
   watermarkTextBox.TextBoxFormat.VerticalOrigin = VerticalOrigin.Margin;
   // Set text wrapping style to behind, so the watermark does not interfere with content
   watermarkTextBox.TextBoxFormat.TextWrappingStyle = TextWrappingStyle.Behind;

   // Add another paragraph inside the text box to contain the watermark text
   IWParagraph watermarkParagraph = watermarkTextBox.TextBoxBody.AddParagraph();
   // Append the watermark text to the paragraph and set the font size and color
   IWTextRange textRange = watermarkParagraph.AppendText(watermarkText);
   // Set a large font size for the watermark text
   textRange.CharacterFormat.FontSize = 100;
   // Set a light gray color for the watermark text
   textRange.CharacterFormat.TextColor = Color.FromArgb(255, 192, 192, 192);
}

You can download a complete working sample to add watermark to specific page in a Word document from the GitHub.

Take a moment to peruse the documentation where you can find basic Word document processing options along with the features like mail merge, merge, split, and compare Word documents, find and replace text in the Word document, protect the Word documents, and most importantly, the PDF and Image conversions with code examples.

Conclusion

I hope you enjoyed learning about how to add watermark to specific page in a Word document in .NET Core Word document.

You can refer to our ASP.NET Core DocIO feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core DocIO example to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion®, you can try our 30-day free trial to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!