Webbrowser Click Button With No ID Or Name - vb.net

Question

I am trying to use the WebBrowser in Visual Studio 2012 (Visual Basic) to click a button. I have done a lot of research, but all I can find is to click with an ID or a name.
Here is the HTML code.
<button type='submit' class="btn btn-default" style='float:right'>
Login<i class="gicon-chevron-right"></i>
I am going to have the webbrowser hidden, & then when the user clicks Button1, it invokes the click on the webbrowser. Please help.

Answer 1

You need to search for your element one by one. Try something like this:
For Each elem As HtmlElement In wb1.Document.GetElementsByTagName("button")
' Check the attributtes you want
If elem.GetAttribute("class") = "btn btn-default" Then
'Check even the text if you want
If elem.InnerText = "Login" Then
'Invoke your event
elem.InvokeMember("click")
End If
End If
Next
This will search on all the button elements on the document. You could narrow the searching by looking inside some element that contains your button that has ID or something:
Dim myElem As HtmlElement = wb1.Document.GetElementById("myContainerId")
For Each elem As HtmlElement In myElem.GetElementsByTagName("button")
'...
Next

Answer 2

simple code :
WebBrowser1.Document.Forms(0).InvokeMember("submit")

Answer 3

Dim HtmlElementcoll As HtmlElementCollection = WebBrowser1.Document.GetElementsByTagName("input")
For Each elem As HtmlElement In HtmlElementcoll
' Check the attributtes you want
If elem.GetAttribute("value") = "Sign In" Then
'Check even the text if you want
' If elem.InnerText = "Sign In" Then
'Invoke your event
elem.InvokeMember("click")
'End If
End If
Next
i have modified the code above and its working add HtmlElementCollection and you are good to go..