Extract data from an HTML page using the .NET framework

I am trying to extract data from an HTML page using C# code. I am currently loading the page as a string with System.Net.WebClient and utilizing HTML Agility Pack to retrieve information within HTML tags such as forms, labels, and inputs.

The issue arises when some of the content is embedded within a JavaScript script tag like this:

<script type="text/javascript">
//<![CDATA[
var itemCol = new Array();

itemCol[0] = {
    pid: "01010101",
    Desc: "Some desc",
    avail: "Available",
    price: "$10.00"
};

itemCol[1] = {
    pid: "01010101",
    Desc: "Some desc",
    avail: "Available",
    price: "$10.00"
};

//]]>
</script>

Could someone please advise on how I can convert this JavaScript object into a collection in .NET? Is there any way to achieve this using HTML Agility Pack? Any assistance would be greatly appreciated.

Thank you in advance.

c#javascript.nethtml-parsing

Answer №1

The Happiness Action Plan (HAP) does not have the capability to separate the javascript code for you - it can only extract the information within the element.

For handling javascript parsing, you might want to consider checking out javascript.masterclass.

Answer №2

Which specific part of the content within the script tag are you interested in extracting? What type of collection do you anticipate receiving? You always have the option to target script tags as demonstrated below:

  Utilizing the HtmlAgilityPack library, you can easily parse HTML documents:
  HtmlDocument doc = new HtmlDocument();
  doc.LoadHtml(htmlContent);
  XPathNavigator navigator = doc.CreateNavigator();
  XPathNodeIterator scripts = navigator.Select("//script");

  foreach (XPathNavigator node in scripts)
  {
    string innerXml = node.InnerXml;

    // Implement regex to further analyze the inner XML data
  }

Answer №3

By utilizing the javascript.net library, you have access to a plethora of features

 using (JavascriptContext context = new JavascriptContext())
  {
    context.SetParameter("info", new MyData());

     StringBuilder result = new StringBuilder();

    foreach (XPathNavigator node in scriptElements)
    {
       result.Append(node.InnerXml);
    }

  result.Append(";info.item = itemCollection;");
  context.Run(result.ToString());

  MyObject obj = context.GetParameter("info") as MyObject;

To create a structured data model, simply define a class like below:

   class MyData
   {
     public object item { get; set; }
   }

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