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How can an EMF image be changed to a PNG with the same size in a word document?
3 mins read
Syncfusion® Essential® DocIO is a .NET Word library used to create, read, and edit Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can change the EMF image to PNG with same size in a word document using C#.
To convert and replace EMF image in word document to PNG of the same size using C#
- Create a new C# console application project in .NET Core.
- Install the Syncfusion.DocIORenderer.Net.Core NuGet package as a reference to your .NET Core applications from NuGet.org.
- Include the following namespace in the Program.cs file.
C#
using Syncfusion.DocIO; using Syncfusion.DocIO.DLS; using Syncfusion.DocIORenderer; using Syncfusion.Pdf; using System.Drawing; using System.Drawing.Imaging;
VB
Imports System.Drawing Imports System.Drawing.Imaging Imports Syncfusion.DocIO Imports Syncfusion.DocIO.DLS Imports Syncfusion.DocIORenderer Imports Syncfusion.Pdf
- Use the following code example to convert and replace EMF image to PNG in the Word to PDF conversion.
C#
//Open the file as a Stream.
using (FileStream docStream = new FileStream(@"../../../SyncfusionConvertWordToPdfIssueDoc.docx", FileMode.Open, FileAccess.Read))
{
//Load a file stream into a Word document.
using (WordDocument wordDocument = new WordDocument(docStream, FormatType.Automatic))
{
ConvertEMFToPNG(wordDocument);
//Instantiation of DocIORenderer for Word to PDF conversion.
DocIORenderer render = new DocIORenderer();
//Convert a Word document into a PDF document.
using (PdfDocument pdfDocument = render.ConvertToPDF(wordDocument))
{
//Save the PDF file.
using (FileStream outputFile = new FileStream("Output.pdf", FileMode.OpenOrCreate, FileAccess.ReadWrite))
pdfDocument.Save(outputFile);
}
}
}
VB
'Open the file as a Stream
Using docStream As FileStream = New FileStream("../../../SyncfusionConvertWordToPdfIssueDoc.docx", FileMode.Open, FileAccess.Read)
'Load a file stream into a Word document
Using wordDocument As WordDocument = New WordDocument(docStream, FormatType.Automatic)
ConvertEMFToPNG(wordDocument)
'Instantiation of DocIORenderer for Word to PDF conversion
Dim render As DocIORenderer = New DocIORenderer
'Convert a Word document into a PDF document
Using pdfDocument As PdfDocument = render.ConvertToPDF(wordDocument)
'Saves the PDF file
Using outputFile As FileStream = New FileStream("Output.pdf", FileMode.OpenOrCreate, FileAccess.ReadWrite)
pdfDocument.Save(outputFile)
End Using
End Using
End Using
End Using
- Use the following helper method to convert EMG image format to PNG format with the same size.
C#
private static void ConvertEMFToPNG(WordDocument wordDocument)
{
WTextBody textbody = wordDocument.Sections[0].Body;
//Iterates through the paragraphs of the textbody
foreach (WParagraph paragraph in textbody.Paragraphs)
{
//Iterates through the child elements of a paragraph
foreach (ParagraphItem item in paragraph.ChildEntities)
{
if (item is WPicture)
{
WPicture picture = item as WPicture;
Image image = Image.FromStream(new MemoryStream(picture.ImageBytes));
if (image.RawFormat.Equals(ImageFormat.Emf))
{
float height = picture.Height;
float width = picture.Width;
FileStream imgFile = new FileStream("Output.png", FileMode.OpenOrCreate, FileAccess.ReadWrite);
image.Save(imgFile, ImageFormat.Png);
imgFile.Dispose();
image.Dispose();
FileStream imageStream = new FileStream(@"Output.png", FileMode.Open, FileAccess.ReadWrite);
picture.LoadImage(imageStream);
picture.LockAspectRatio = false;
picture.Height = height;
picture.Width = width;
}
}
}
}
}
VB
Private Sub ConvertEMFToPNG(ByVal wordDocument As WordDocument)
Dim textbody As WTextBody = wordDocument.Sections(0).Body
'Iterates through the paragraphs of the textbody
For Each paragraph As WParagraph In textbody.Paragraphs
'Iterates through the child elements of a paragraph
For Each item As ParagraphItem In paragraph.ChildEntities
If (TypeOf item Is WPicture) Then
Dim picture As WPicture = CType(item, WPicture)
Dim image As Image = Image.FromStream(New MemoryStream(picture.ImageBytes))
If image.RawFormat.Equals(ImageFormat.Emf) Then
Dim height As Single = picture.Height
Dim width As Single = picture.Width
Dim imgFile As FileStream = New FileStream("Output.png", FileMode.OpenOrCreate, FileAccess.ReadWrite)
image.Save(imgFile, ImageFormat.Png)
imgFile.Dispose()
image.Dispose
Dim imageStream As FileStream = New FileStream("Output.png", FileMode.Open, FileAccess.ReadWrite)
picture.LoadImage(imageStream)
picture.LockAspectRatio = False
picture.Height = height
picture.Width = width
End If
End If
Next
Next
End SubA complete working example in C# can be downloaded from the sample.
Take a moment to peruse the documentation, where you can find the basic Word document processing options along with the features like mail merge, merge and split documents, find and replace text in the Word document, protect the Word documents, and most importantly PDF and Image conversions with code examples.
Explore more about the rich set of Syncfusion® Word Framework features.
Note:
Starting with v16.2.0.x, if you refer to Syncfusion® assemblies from trial setup or from the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering a Syncfusion® license key in your application to use the components without trail message.
