Convert HTML webpage to Plain Text or Extract Text from HTML in C#

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You can read all details at: Convert HTML to Plain Text or Extract Text from HTML in C#

Additional.cs

String text = "";
String content = File.ReadAllText(dataDir + "Test2.html");
// Create an instance of HTML document
var document = new HTMLDocument(content, "");

// The second way of gathering text elements from document by using custom method
text = GetContent(document.Body);

File.WriteAllText("Test.txt", text);

// The third way of gathering text elements from document by using TextContent property
text = document.Body.TextContent;

File.WriteAllText("Test.txt", text);



static string GetContent(Aspose.Html.Dom.Node node)
{
    StringBuilder sb = new StringBuilder();
    foreach (var n in node.ChildNodes)
    {
        if (n.NodeType == Aspose.Html.Dom.Node.ELEMENT_NODE)
            sb.Append(GetContent(n));
        else if (n.NodeType == Aspose.Html.Dom.Node.TEXT_NODE)
            sb.Append(n.NodeValue);
    }
    return sb.ToString();
}

NodeIterator.cs

String content = File.ReadAllText(dataDir + "Test2.html");

// Create an instance of HTML document
using (var document = new HTMLDocument(content, ""))
{
    // The first way of gathering text elements from document
    // Initialize the instance of node iterator
    Aspose.Html.Dom.Traversal.INodeIterator iterator = document.CreateNodeIterator(document, Aspose.Html.Dom.Traversal.Filters.NodeFilter.SHOW_TEXT, new StyleFilter());
    StringBuilder sb = new StringBuilder();
    Aspose.Html.Dom.Node node;
    while ((node = iterator.NextNode()) != null)
        sb.Append(node.NodeValue);
    Console.WriteLine(sb.ToString());

    File.WriteAllText(@"NodeIterator.txt", sb.ToString());
}


/// <summary>
///  Represents a user filter created in order to ignore content of the 'style' and 'script' element.
/// </summary>
class StyleFilter : Aspose.Html.Dom.Traversal.Filters.NodeFilter
{
    public override short AcceptNode(Aspose.Html.Dom.Node n)
    {
        //If you want to avoid any element, write its name in capital letters
        return (n.ParentElement.TagName == "STYLE" || n.ParentElement.TagName == "SCRIPT" ? FILTER_REJECT : FILTER_ACCEPT);
    }
}

WebpageHTMLtoTXT.cs

// Initialize HTMLDocument object with URL
HTMLDocument document = new HTMLDocument("https://products.aspose.com/html/net");
            
// Read the text contents of the HTML format
String text = document.Body.TextContent;
            
// Write the TXT file with extracted text
File.WriteAllText("Webpage.txt", text);