System.Xml.XPath.XPathException: 'Unclosed chain.'

Question

I am trying to get an information from the web (adress in my code) with HtmlAgilityPack in C#, but I have to wait until the <div class="center fs22 green lh32"> is loaded on the page.

            var url = $"https://www.webpage.com/test{info}";
        var web = new HtmlWeb();
        var doc = web.LoadFromBrowser(url, html =>
        {
            return !html.Contains("<div class=\"center fs22 green lh32\"></div>");
        });
        string adress = doc.DocumentNode
              .SelectSingleNode("//td/span[@id='testedAddress")
              .Attributes["value"].Value;

Unfortunally I always get this error when I start my code : Translation : 'Unclosed chain.'

How can I pass this error ?

Answer 1

The error occurs on the following line:

.SelectSingleNode("//td/span[@id='testedAddress")

There is a ' and a ] missing at the end of that XPath expression. That inner part incompletely enclosed in ' is the "chain" (actually, a string in English, or "chaîne de caractères" in French) the error message is talking about.

So, the line should read instead:

.SelectSingleNode("//td/span[@id='testedAddress']")