How to select a class by GetElementByClass and click on it programmatically

Question

I have been trying to use this code to read the element by class in html/ajax knowing GetElementByClass is not a option in webBrowser.Document. I can't seem to get a return value then invoke the member. Is there a work around for this?

References: Getting HTMLElements by Class Name

Example:

<span class="example">(<a href="http://www.test.com/folder/remote/api?=test" onclick=" return do_ajax('popup_fodder', 'remote/api?=test', 1, 1, 0, 0); return false; " class="example">test</a>)</span>

Example code:

   HtmlElementCollection theElementCollection = default(HtmlElementCollection);
   theElementCollection = webBrowser1.Document.GetElementsByTagName("span");
   foreach (HtmlElement curElement in theElementCollection)
   {
        //If curElement.GetAttribute("class").ToString = "example"  It doesn't work.  
        // This should be the work around.
        if (curElement.OuterHtml.Contains("example"))
        {
            MessageBox.Show(curElement.GetAttribute("InnerText")); // Doesn't even fire.
            // InvokeMember(test) after class is found.
        }
    }

score 15 · Answer 1 · edited Sep 17 '16 at 09:49

I admit it's not very intuitive but you need to use GetAttribute("className") instead of GetAttribute("class")

HtmlElementCollection theElementCollection = default(HtmlElementCollection);
theElementCollection = webBrowser1.Document.GetElementsByTagName("span");
foreach (HtmlElement curElement in theElementCollection)
{
    if (curElement.GetAttribute("className").ToString() == "example")
    {
        MessageBox.Show(curElement.GetAttribute("InnerText")); // Do something you want
    }
}

Kristoffer Schroeder · Answer 2 · 2010-08-08T23:15:21.590

this is a example of how i used the webbrowser control to find class specific elements and invoke Click on a link inside.

simplified >

   foreach (HtmlElement item in webBrowser1.Document.GetElementsByTagName("li"))
        {
            // use contains() if the class attribute is 
            // class="page_item page-item-218 current_page_item"
            //this to be more on spot! >> if (item.OuterHtml.Contains("class=\"page_item"))
            // or
            if (item.OuterHtml.Contains("page_item"))
            {
                foreach (HtmlElement childItem in item.Children)
                {
                    if (childItem.TagName == "A")
                    {
                        //Click the link/Current element
                        childItem.InvokeMember("Click");
                        break;
                    }
                }
                break;
            }
        }

does this way work ?..

it works for me right here.

or maybe i misunderstand your question?

This does not fire the event in the Example link. I am trying to fire the ajax event "Test" if you take a look at the link again . =) — Nightforce2, Aug 10 '10 at 21:32

score 0 · Answer 3 · answered Aug 08 '10 at 22:23

0

Why don't you use qjuery's selector engine for this. And also, where are you expecting the messagebox.show to appear ?

answered Aug 08 '10 at 22:23

Vladimir Georgiev

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3

Awesome, a fork of jquery? ;) – David Tang Aug 09 '10 at 03:33
Messagebox.Show was to show me the text that it retrieved. JQuery I am not familiar with. Got a example in this case? – Nightforce2 Aug 10 '10 at 20:04

score 0 · Answer 4 · answered Sep 04 '17 at 17:51

Dim HtmlElementcolltwo As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("button")
        For Each eleme As HtmlElement In HtmlElementcolltwo
            ' Check the attributtes you want
            If eleme.GetAttribute("className") = "derrt_submit feed-zed-bff" Then
                'Check even the text if you want
                ' If elem.InnerText = "Sign In" Then
                'Invoke your event
                eleme.InvokeMember("click")
                'End If
            End If
        Next

This Also works instead of using "class" use "className"

How to select a class by GetElementByClass and click on it programmatically

4 Answers4

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