How to convert EMF Images to PNG in Word Documents and Export to HTML in .NET

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 Convert EMF Images to PNG in Word Documents and Export to HTML in .NET using C#.

Steps to Convert EMF Images to PNG in Word Documents and Export to HTML in .NET:

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. Install the Syncfusion.MetafileRenderer.Net.Core NuGet package as a reference to your project from NuGet.org.
   

   

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

using SkiaSharp;
using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;
using Syncfusion.Drawing;
using Syncfusion.Metafile;

4. Use the following code example to convert EMF Images to PNG in Word Documents and Export to HTML in .NET.
   C#

using (FileStream inputStream = new FileStream(@"Data/Input.docx", FileMode.Open, FileAccess.ReadWrite))
{
   // Opens an input Word template.
   using (WordDocument document = new WordDocument(inputStream, FormatType.Docx))
   {
       // Find all picture in the document.
       List<Entity> images = document.FindAllItemsByProperty(EntityType.Picture, null, null);
       // Iterate through each image in the document.
       foreach (Entity entity in images)
       {
           WPicture picture = entity as WPicture;
           float width = picture.Width;
           float height = picture.Height;

           // Convert the image bytes into a memory stream.
           MemoryStream stream = new MemoryStream(picture.ImageBytes);
           // Create an Image object from the memory stream.
           Image image = Image.FromStream(stream);
           // Check if the image format is EMF.
           if (image.RawFormat.Equals(ImageFormat.Emf))
           {
               MemoryStream imageByteStream = new MemoryStream(picture.ImageBytes);
               //Create a new instance for the MetafileRenderer
               MetafileRenderer renderer = new MetafileRenderer();
               //Convert the Metafile to SKBitmap Image.
               SKBitmap skBitmap = renderer.ConvertToImage(imageByteStream);
               //Save the image as stream
               using (SKImage skImage = SKImage.FromBitmap(skBitmap))
               using (SKData data = skImage.Encode(SKEncodedImageFormat.Png, 100))

               using (MemoryStream pngStream = new MemoryStream())
               {
                   data.SaveTo(pngStream);
                   pngStream.Position = 0;
                   picture.LoadImage(pngStream);
                   picture.Height = height;
                   picture.Width = width;
               }
               imageByteStream.Dispose();
           }
           stream.Dispose();
       }
       // Save the modified document to the specified output file.
       using (FileStream outputStream = new FileStream(@"Output/Result.html", FileMode.Create, FileAccess.Write))
       {
           document.Save(outputStream, FormatType.Html);
       }
   }
}

You can download a complete working sample to convert EMF Images to PNG in Word Documents and Export to HTML in .NET from the GitHub.

A sample output of the EMF images converted to PNG in Word document and export to HTML is shown below:

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 convert EMF Images to PNG in Word Documents and Export to HTML in .NET.

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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