如何从HtmlDocument对象过滤隐藏字段？

Question

I have loaded an HtmlDocument using HtmlWeb . I understand I can get all the hidden input fields using the SelectNodes() method. But I don't want to get all the hidden input like "__VIEWSTATE" or "__EVENTTARGET". how can i filter them?

Code:

    HtmlWeb web = new HtmlWeb();
    HtmlDocument doc = web.Load(url);

    HtmlNodeCollection hiddenFieldNodes = doc.DocumentNode.SelectNodes("//input[@type='hidden']");

Edit: Is there any XPath I can apply to filter among hidden input fields?

Answer 1

You can ignore any of the Asp.NET special hidden fields, with the following xpath . All of their special fields have names starting with two underscores:

HtmlWeb web = new HtmlWeb();
HtmlDocument doc = web.Load(url);

HtmlNodeCollection visibleFieldNodes = doc.DocumentNode.SelectNodes("//input[not(starts-with(@name, '__'))]");