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Finding and replacing text with content in ASP.NET Core Word

6 mins read

Syncfusion Essential DocIO is a .NET Core Word library used to create, read, and edit Word documents programmatically without Microsoft Word or Interop dependencies. Using this library, you can find and replace text with content control in the Word document in C#.

Steps to find and replace text with content control in the Word document:   

  1. Create a new C# .NET Core console application project. Create .NET Core console application in Visual Studio in ASP.NET Core Word
  2. Install the Syncfusion.DocIO.Net.Core NuGet package as a reference to your .NET Core applications from

  3. Add DocIO.Net.Core NuGet packages of ASP.NET Core Word
  4. Include the following namespace in the Program.cs file:


using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;
  1. Use the following code example to find and replace text with content control in the Word document:


using (FileStream inputStream= new FileStream(Path.GetFullPath(@"../../../Data/Input.docx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
   //Load an existing Word document.
   using (WordDocument document = new WordDocument(inputStream, FormatType.Docx))
       //Create a BlockContentControl.
       BlockContentControl blockContentControl = new BlockContentControl(document, ContentControlType.RichText);
       //Add a new table to the block content control.
       WTable table = blockContentControl.TextBody.AddTable() as WTable;
       //Specify the total number of rows and columns.
       table.ResetCells(1, 2);
       //Get first row of the table.
       WTableRow row = table.Rows[0];
       //Add a new paragraph to the first cell of the table.
       IWParagraph cellParagraph= row.Cells[0].AddParagraph();
       row.Cells[0].CellFormat.VerticalAlignment = VerticalAlignment.Top;
       FileStream imageStream = new FileStream(Path.GetFullPath(@"../../../Data/image.png"), FileMode.Open, FileAccess.ReadWrite);
       //Append a picture to the cell.
       WPicture picture = cellParagraph.AppendPicture(imageStream) as WPicture;
       picture.Height = 88.3f;
       picture.Width = 142.2f;
       //Add a new paragraph to the next cell.
       cellParagraph = row.Cells[1].AddParagraph();
       row.Cells[1].CellFormat.VerticalAlignment = VerticalAlignment.Top;
       cellParagraph.ParagraphFormat.BeforeSpacing = 12f;
       //Append text to the cell.
       IWTextRange text = cellParagraph.AppendText("Mountain-200");
       cellParagraph.ParagraphFormat.AfterSpacing = 3f;
       //Set the text format.
       text.CharacterFormat.Bold = true;
       text.CharacterFormat.FontName = "Arial";
       text.CharacterFormat.FontSize = 16f;
       //Add a new paragraph.
       cellParagraph = row.Cells[1].AddParagraph();
       //Append text to the paragraph of a cell.
       cellParagraph.AppendText("Product No: BK-M68B-38 \nSize: 38\nWeight: 25\nPrice: $2,294.99\n\n ");
       //Specify the table borders border type.
       table.TableFormat.Borders.BorderType = BorderStyle.Single;
       //Create a textbody part object.
       TextBodyPart textBodyPart = new TextBodyPart(document);
       //Add the block content control to the textbodyPart.
       //Replace all entries of a given regular expression with the text body part.
       document.Replace(new Regex("<<(.*)>>"), textBodyPart);
       //Create a file stream.
       using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"../../../Sample.docx"), FileMode.Create, FileAccess.ReadWrite))
           //Save the Word document to the file stream.
           document.Save(outputFileStream, FormatType.Docx);

A complete working sample to find and replace text with content control in the Word document in C# can be downloaded from GitHub.

By executing the program, you will get the Output document as follows.

Output document generated in ASP.NET Core Word

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

Explore more about the rich set of Syncfusion Word Framework features.

See Also:

How to replace the particular text with hyperlink in Word document

How to replace text in a Word document with HTML

How to find and replace text inside table in Word document

How to find and replace text in headers and footers of Word document

How to find and replace placeholder with page break in Word document

How to find and replace line break in Word document as paragraph mark?

How to find and replace in Word document with text from database?


Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to link to learn about generating and registering Syncfusion license key in your application to use the components without trail message.



I hope you enjoyed learning about how to find and replace text with content in ASP.NET Core Word.

You can refer to our ASP.NET Core Word Library feature tour page to know about its other groundbreaking feature representations.

You can also explore our .NET Core Word Library example to understand how to present and manipulate data. For current customers, you can check out our .NET Core 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 .NET Core Word Library and other .NET Core components.

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

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