How to execute mail merge fields in a textbox, header, or footer 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 execute mail merge fields in a textbox, header, or footer in a Word document using C#.

To achieve this, add the merge field inside a textbox, header, or footer in the template Word document and then perform a mail merge.

Steps to execute mail merge fields in a textbox, header, or footer 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 perform mail merge in a Word document.
   C#

using (FileStream fileStream = new FileStream(Path.GetFullPath(@"Data/Template.docx"), FileMode.Open, FileAccess.ReadWrite))
{
   //Loads an existing Word document into DocIO instance.
   using (WordDocument document = new WordDocument(fileStream, FormatType.Automatic))
   {
       string[] fieldNames = new string[] { "HeaderContent", "ProductName1", "ProductName2" };
       string[] fieldValues = new string[] { "Adventure Works Cycles", "Mountain-200", "Mountain-300" };
       //Performs the mail merge
       document.MailMerge.Execute(fieldNames, fieldValues);

       //Creates file stream.
       using (FileStream outputStream = new FileStream(Path.GetFullPath(@"Output/Result.docx"), FileMode.Create, FileAccess.ReadWrite))
       {
           //Saves the Word document to file stream.
           document.Save(outputStream, FormatType.Docx);
       }
   }
}

You can download a complete working sample to execute mail merge fields in a textbox, header, or footer 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 execute mail merge fields in a textbox, header, or footer 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.

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