Is there a way to successfully press a button on a website?

Question

Is there a way to successfully press a button on a website?

While testing, I start by navigating in the constructor

webBrowser1.ScriptErrorsSuppressed = true;
webBrowser1.Navigate("http://www.tapuz.co.il/forums/forumpage/393");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;

Next, in the DocumentCompleted event:

void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
            {

                HtmlElementCollection items = this.webBrowser1.Document.GetElementsByTagName("span"); 
                foreach (HtmlElement item in items)
                {
                    if (item.GetAttribute("className") == "addMessage")
                    {
                        webBrowser1.Document.GetElementById("onclick").InvokeMember("click");
                    }
                }
            }

Upon inspecting the addMessage button, I notice:

<span class="addMessage" onclick="location='http://www.tapuz.co.il/forums/addmsg/393/טבע_ומזג_אוויר/מזג_האוויר'">  | הוספת הודעה</span>

However, I encounter a null value on the line:

webBrowser1.Document.GetElementById("onclick").InvokeMember("click");

My goal is to successfully click on the addMessage button.

c#html .net winforms webbrowser-control

Answer 1

Answer №1

If you want to make a change, consider changing it from:

webBrowser1.Document.GetElementById("onclick").InvokeMember("click");

To:

item.InvokeMember("Click");

The 'item' variable already refers to the specific element you are targeting, so simply invoking the click member on it should suffice.

HtmlElementCollection elements = this.WebBrowserWindow.Document.GetElementsByTagName("button");
            foreach (HtmlElement element in elements)
            {
                if (element.GetAttribute("type").Equals("submit"))
                {
                    element.InvokeMember("Click");
                    break;
                }

            }

Answer 2

If you want to make a change, consider changing it from:

webBrowser1.Document.GetElementById("onclick").InvokeMember("click");

To:

item.InvokeMember("Click");

The 'item' variable already refers to the specific element you are targeting, so simply invoking the click member on it should suffice.

HtmlElementCollection elements = this.WebBrowserWindow.Document.GetElementsByTagName("button");
            foreach (HtmlElement element in elements)
            {
                if (element.GetAttribute("type").Equals("submit"))
                {
                    element.InvokeMember("Click");
                    break;
                }

            }

Is there a way to successfully press a button on a website?

Answer №1

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