How to read HTML as XML?
HTML simply isn’t the same as XML (unless the HTML actually happens to be conforming XHTML or HTML5 in XML mode). The best way is to use a HTML parser to read the HTML. Afterwards you may transform it to Linq to XML – or process it directly.
Solution 2
I haven’t used it myself, but I suggest you take a look at SGMLReader. Here’s a sample from their home page:
XmlDocument FromHtml(TextReader reader) < // setup SgmlReader Sgml.SgmlReader sgmlReader = new Sgml.SgmlReader(); sgmlReader.DocType = "HTML"; sgmlReader.WhitespaceHandling = WhitespaceHandling.All; sgmlReader.CaseFolding = Sgml.CaseFolding.ToLower; sgmlReader.InputStream = reader; // create document XmlDocument doc = new XmlDocument(); doc.PreserveWhitespace = true; doc.XmlResolver = null; doc.Load(sgmlReader); return doc; >Solution 3
If you want to extract some links from a page, as you mentioned, try using HTML Agility Pack.
This code gets a page from the web and extracts all links:
HtmlWeb web = new HtmlWeb(); HtmlDocument document = web.Load("http://www.stackoverflow.com"); HtmlNode[] links = document.DocumentNode.SelectNodes("//a").ToArray(); Open an html file from disk and get URL for specific link:
HtmlDocument document2 = new HtmlDocument(); document2.Load(@"C:\Temp\page.html") HtmlNode link = document2.DocumentNode.SelectSingleNode("//a[@id='myLink']"); Console.WriteLine(link.Attributes["href"].Value); Solution 4
HTML is not XML. HTML is based on SGML, and as such does not ensure that the markup is well-formed XML (XML is a subset of SGML itself). You can only parse XHTML, i.e. XML compatible HTML, as XML. But of course that is not the case for most of the websites.
To work with HTML, you need to use a HTML parser.
How to read HTML as XML?
XML file holds XML code and the file is saved under the extension .xml. Examples of XML File This section covers how to create an XML file and letting them to execute in a Web browser.
How to read HTML as XML?
I want to extract a couple of links from an html page downloaded from the internet, I think that using linq to Xml would be a good solution for my case.
My problem is that I can’t create an XmlDocument from the HTML, using Load(string url) didn’t work so I downloaded the html to a string using:
public static string readHTML(string url)
When I try to load that string using LoadXml(string xml) I get the exception
'--' is an unexpected token. The expected token is '>' What way should I take to read the html file to a parsable XML
HTML simply isn’t the same as XML (unless the HTML actually happens to be conforming XHTML or HTML5 in XML mode). The best way is to use a HTML parser to read the HTML. Afterwards you may transform it to Linq to XML – or process it directly.
I haven’t used it myself, but I suggest you take a look at sgmlreader. Here’s a sample from their home page:
XmlDocument FromHtml(TextReader reader) < // setup SgmlReader Sgml.SgmlReader sgmlReader = new Sgml.SgmlReader(); sgmlReader.DocType = "HTML"; sgmlReader.WhitespaceHandling = WhitespaceHandling.All; sgmlReader.CaseFolding = Sgml.CaseFolding.ToLower; sgmlReader.InputStream = reader; // create document XmlDocument doc = new XmlDocument(); doc.PreserveWhitespace = true; doc.XmlResolver = null; doc.Load(sgmlReader); return doc; >If you want to extract some links from a page, as you mentioned, try using HTML Agility Pack.
This code gets a page from the web and extracts all links:
HtmlWeb web = new HtmlWeb(); HtmlDocument document = web.Load("http://www.stackoverflow.com"); HtmlNode[] links = document.DocumentNode.SelectNodes("//a").ToArray(); Open an html file from disk and get URL for specific link:
HtmlDocument document2 = new HtmlDocument(); document2.Load(@"C:\Temp\page.html") HtmlNode link = document2.DocumentNode.SelectSingleNode("//a[@id='myLink']"); Console.WriteLine(link.Attributes["href"].Value); HTML is not XML. HTML is based on SGML, and as such does not ensure that the markup is well-formed XML (XML is a subset of SGML itself). You can only parse XHTML, i.e. XML compatible HTML, as XML. But of course that is not the case for most of the websites.
To work with HTML, you need to use a HTML parser.
Html to xml Code Example, Get code examples like «html to xml» instantly right from your google search results with the Grepper Chrome Extension. Grepper. Follow. GREPPER; SEARCH …
XML Examples
Viewing XML Files
View a simple XML file (note.xml)
View the same XML File with an error
View an XML CD catalog
View an XML plant catalog
View an XML food menu
XML and CSS
View an XML CD catalog
View the corresponding CSS file
Display the CD catalog formatted with the CSS file
XML and XSLT
View an XML food menu
Display the food menu styled with an XSLT style sheet
Parsing XML and the XML DOM
View a simple XML file (note.xml)
Parse an XML string
Parse the XML file
XML Output From a Server
See how ASP can return XML
See how PHP can return XML
View XML Output from a database
C# — How to read HTML as XML?, HTML is not XML. HTML is based on SGML, and as such does not ensure that the markup is well-formed XML (XML is a subset of SGML itself). You can only …
XML File
Definition of XML File
An Extensible Mark Up file is defined as a text-based language that carries data in the form of tags not the format of the data. It is the most efficient way to store and move data online. XML file holds XML code and the file is saved under the extension .xml. It is formatted with tags like HTML tags and other XML-based file types include EDS, FDX, and DAE files. An XML file acts as a database to store the data. The most commonly used example of an XML-based file is RSS Feed.
A very Simple Syntax is given as
How does File work in XML?
In this article, let’s see how to construct a simple XML file on our own. The XML file is plain text to store or transfer data on the internet. Web-based applications store information and transfer it through the web in XML format. Though XML file is meant for storages the format of them is very important. For example, XML format is used for musical files.
The file works well in all editors to view an XML file or to change the formats it is recommended to use XML viewers Online. In the case of Text editors, an XML file is opened as a text file. Commonly used text editors are Notepad and WordPad to read an XML file. Well, known popular Online viewers are Code Beautify and JSON Formatter. The main reason for accessing XML Files is good for data Storage. The hierarchical format of XML file includes:
- Child Element: The element inside another element.
- Global Element: Direct child element of the root tag. This Global element is referenced ain XML Schema.
- Local Element: It is a nesting element.
Other elements are multiple-occurring and single occurring elements.
These XML files could work on R programming and Java Programming provided the packages have to be installed.
Creating a File:
It is done by practicing our XML files in a text editor.
- Open the text-editor file.
- And the first line of the file should include an XML declaration to tell the editor that it is an XML file.
- The next step is to create a root element which is the main role in the XML file. The root element should start with the start tag and end with the close tag.
- Followed by this is adding a child element.
The XML file is created by storing the information of a particular project in tags and save the file using the file extension ‘.xml’. Let’s see the sample XML file to do the operations:
Reading the XML file in R:
To check how XML file is loaded into Caching Database we need the following attributes namely:
- FileName: Entering the full file Path to load it into the page.
- jpath/ Xpath: Defining the XML file to locate without Namespaces.
Few converters convert the XML file to other formats like HTML, CSS, and XSD.
Using a Text editor
As XML file is a text file, we can open it in any editors which helps to open and display the XML file Contents. In different programs we can open an XML file. Formally, right-click the XML file -> open-> Menu -> choose any programs to open.
Using a Web browser to see the data in a File
To view the XML file in a Browser it shows as a Document tree. The sample is shown below in which it displays in a different color. Although we can see in blue text, still they are unclickable. To know exactly what these XML tags are been, it is recommended to use XSLT to transform XML into various output formats.
Examples of XML File
This section covers how to create an XML file and letting them to execute in a Web browser.
Example #1
Explanation: This is how we created a file to work with which is a completed version XML file. Folders is a root element and it contains sub-elements stdname, specialization. The folder is a parent element, stdname, specialization, G1..G5 are sibling elements. The following output shows the elements, structures, and attributes in an XML file.
Example #2 – Using DOCTYPE
Explanation: Above XML document displays a BookStore in XML file.
Example #3 – Parsing XML File
Parsing XML File
Explanation: The above code uses XML document to Parse an individual XML file.
Example #4 – XML file in the format in DOCMAKER
Explanation: The above code is done for Document marker workstation where it lists few tags for defining a .DAT file in DOCSET and field tag for forms and Group keys tags.
Conclusion
To the end, XML files practically model a hierarchical Database. Each Position specified in an XML hierarchy implements the relationships to other elements in the code. Therefore, in this article, we have seen how to work with files in .xml extensions and demo examples of various cases. This XML file could be implemented in Other programming Languages to retrieve the data from the XML document.
Final thoughts
This is a guide to XML File. Here we also discuss the introduction and how file work in xml? along with different examples and its code implementation. You may also have a look at the following articles to learn more –
XML Examples, SQL Examples. PHP Examples. Java Examples. jQuery Examples. W3Schools is optimized for learning and training. Examples might be simplified to improve …