How to replace a logo with text and another image with different text 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 replace a logo with text and another image with different text in a Word document using C#.

To achieve this, follow the steps below:

• Get the logo image stream for comparison with images in the Word document.
• Find all pictures in the Word document.
• Get the index of each picture.
• Remove the picture from the document.
• If the picture is the logo image, add specific text at that location.
• For all other pictures, add different specific text at that location.

Steps to replace a logo with text and another image with different text 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;
using System.Collections.Generic;
using System.IO;

4. Use the following code example to replace a logo with text and another image with different text in a Word document.
   C#

using (FileStream fileStreamPath = new FileStream(Path.GetFullPath(@"Data/Input.docx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
   //Open an existing Word document.
   using (WordDocument document = new WordDocument(fileStreamPath, FormatType.Automatic))
   {
       //Open the logo image stream to compare with existing images in the document.
       FileStream logoImageStream = new FileStream(@"Data/LogoImage.jpg", FileMode.OpenOrCreate, FileAccess.ReadWrite);
       //Find all pictures in the Word document by their EntityType
       List<Entity> pictures = document.FindAllItemsByProperty(EntityType.Picture, null, null);
       //Iterate through each picture found in the document.
       foreach (WPicture picture in pictures)
       {
           WParagraph ownerParagraph = picture.OwnerParagraph;
           //Find the index of picture in the owner paragraph.
           int index = ownerParagraph.ChildEntities.IndexOf(picture);
           //Remove the picture from its owner paragraph.
           ownerParagraph.ChildEntities.Remove(picture);
           //Create a new text range for inserting text.
           WTextRange textRange = new WTextRange(document);
           //Check if the current picture's image byte length matches the logo image's length.
           if (picture.ImageBytes.Length == logoImageStream.Length)
               //Replace the logo image with the text "< Logo image here >".
               textRange.Text = "< Logo image here >";
           else
               //Replace other images with the text "< Product image here >".
               textRange.Text = "< Product image here >";
           //Insert the newly created text range at the index of the removed picture.
           ownerParagraph.ChildEntities.Insert(index, textRange);
       }
       //Create file stream.
       using (FileStream outputFileStream = new FileStream(Path.GetFullPath(@"Output/Output.docx"), FileMode.Create, FileAccess.ReadWrite))
       {
           //Save the Word document to file stream.
           document.Save(outputFileStream, FormatType.Docx);
       }
   }
}

You can download a complete working sample to replace a logo with text and another image with different text in a Word document from the GitHub.

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

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 how to replace the table cell content 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.

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