Document.GetElementsByTagNameNS

Document.GetElementsByTagNameNS method

Returns a list of elements with the given tag name belonging to the given namespace. The complete document is searched, including the root node.

public HTMLCollection GetElementsByTagNameNS(string namespaceURI, string localName)

Parameter	Type	Description
namespaceURI	String	The namespace URI of elements to look for.
localName	String	Either the local name of elements to look for or the special value *, which matches all elements.

Return Value

A live NodeList (but see the note below) of found elements in the order they appear in the tree.

Remarks

Refer to official spec.

Practice web development content can be founded in w3schools.

You can download the complete examples and data files from GitHub.

Examples

var elements = document.GetElementsByTagNameNS(@namespace, name);

# HTML content. File extension - xhtml
<!DOCTYPE html>
<html lang="en"
	xmlns="http://www.w3.org/1999/xhtml"
	xmlns:xml="http://www.w3.org/XML/1998/namespace">
...
<xml:uniquetag>
  xml namespace uniquetag content goes here...
</xml:uniquetag>
...
</html>

# C# code
using System;
using Aspose.Html;
using Aspose.Html.Collections;
using Aspose.Html.Dom;
...
using (var document = new HTMLDocument(inputHtmlPath))
{
    HTMLCollection htmlCollection = document.GetElementsByTagNameNS("http://www.w3.org/XML/1998/namespace","uniquetag");
    Console.WriteLine($"Found: {htmlCollection.Length}" );
    foreach (Element element in htmlCollection)
    {
      Console.WriteLine(element.InnerHTML);
    }  
    // User code goes here
}





# Console output

Found: 1

xml namespace uniquetag content goes here...

*inputHtmlPath - user input xhtml file path

# HTML content. File extension - xhtml
<!DOCTYPE html>
<html lang="en"
   xmlns="http://www.w3.org/1999/xhtml"
   xmlns:custom="http://www.company.com"
   xmlns:xml="http://www.w3.org/XML/1998/namespace">
...
<xml:CATALOG>
	<xml:CD>
    <xml:TITLE>Empire Burlesque</xml:TITLE>
    <xml:ARTIST>Bob Dylan</xml:ARTIST>
    <xml:COUNTRY>USA</xml:COUNTRY>
    <xml:COMPANY>Columbia</xml:COMPANY>
    <xml:PRICE>10.90</xml:PRICE>
    <xml:YEAR>1985</xml:YEAR>
  </xml:CD>
...

# C# code
using System;
using Aspose.Html;
using Aspose.Html.Collections;
using Aspose.Html.Dom;
...
using (var document = new HTMLDocument(inputHtmlPath))
{
	HTMLCollection htmlCollection = 
          document.GetElementsByTagNameNS("http://www.w3.org/XML/1998/namespace", "ARTIST");
	Console.WriteLine($"Found: {htmlCollection.Length}" );
	foreach (Element element in htmlCollection)
	{
		Console.WriteLine(element.InnerHTML);
	}
         
	// User code goes here
}

Console output

Found: 3

Bob Dylan

Bonnie Tyler

Dolly Parton

*inputHtmlPath - user input xhtml file path

Document.GetElementsByTagNameNS