How to extract JSON embedded on a HTML page using C#

Question

The JSON I wish to use is embedded on a HTML page. Within a tag on the page there is a statement:

<script>
jsonRAW = {... heaps of JSON... }

Is there a parser to extract this from HTML? I have looked at json.NET but it requires its JSON reasonably formatted.

Html Agility Pack is an HTML parser written in C# to read/write DOM and supports plain XPATH or XSLT. — Mohit S
– Mohit S, Commented Sep 24, 2018 at 2:58
The Html Agility Pack is an excellent tool and will be part of the solution. It will get the content of the <script> tag. Now to parse the javascript variable... — John Hartley
– John Hartley, Commented Sep 24, 2018 at 23:50

Gauravsa · Accepted Answer · 2018-09-24 04:48:47Z

2

You can try to use HTML Agility pack. This can be downloaded as a Nuget Package. After installing, this is a tutorial on how to use HTML Agility pack. The link has more info but it works like this in code:

var urlLink = "http://www.google.com/jsonPage"; // 1. Specify url where the json is to read. 

var web = new HtmlWeb(); // Init the HTMl Web

var doc = web.Load (urlLink); // Load our url

if (doc.ParseErrors != null) { // Check for any errors and deal with it. 
}

doc.DocumentNode.SelectSingleNode(""); // Access the dom.

There are other things in between but this should get you started.

answered Sep 24, 2018 at 4:48

Gauravsa

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