How to convert HTML document to plain text in C# and VB.NET?

The Essential® DocIO converts the HTML file into a Word document and vice versa. You can also convert an HTML document to plain text format and vice versa.

In the Word library (DocIO), we use XmlReader for parsing the content from input HTML. So, the input HTML should meet XML standards (have proper open and close tags), even if you specify the XHTMLValidationType parameter as XHTMLValidationType.None.

XHTML Validation

Every HTML content is validated against a Document Type Declaration (DTD), which is a set of markup declarations that define a document type for an SGML-family markup language (GML, SGML, XML, HTML).

XHTML validation types

The following XHTML validation types are supported in Essential® DocIO while importing HTML content.

Steps to convert HTML document to plain text in C#

1. Create a new C# console application project.

2. Install the Syncfusion.DocIO.WinForms NuGet package as a reference to your .NET Framework applications from the NuGet.org.

3. Include the following namespaces in the Program.cs file:

C#

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;

VB

Imports Syncfusion.DocIO
Imports Syncfusion.DocIO.DLS

4. Use the following code to convert an HTML document to plain text.

C#

// Loads the HTML document against validation type none
WordDocument document = new WordDocument("Input.html", FormatType.Html, XHTMLValidationType.None);
// Saves the Word document
document.Save("HTMLtoText.txt", FormatType.Txt);
// Closes the document
document.Close();

VB

'Loads the HTML document against validation type none 
Dim document As WordDocument = New WordDocument("Input.html", FormatType.Html, XHTMLValidationType.None) 
'Saves the Word document
document.Save("HTMLtoText.txt", FormatType.Txt)
'Closes the document
document.Close()

A complete working example of converting a HTML document to plain text in C# can be downloaded from here.

Input HTML Document as Follows:

By executing the program, you will get the plain text as follows:

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

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

An online example to protect the Word document from editing using DocIO.

See Also:

Word to HTML and HTML to Word Conversions