Click a form button inside webbrowser

Question

Hi all.

I am trying to extract data from some web page,  using webbrowser control, but first i have to login. I would like to login automaticly.

On my web page, as you allready know, I have username and passwor fields that i can fill using following code:

 

Me.WebBrowser1.Document.Forms(0).GetElementsByTagName("INPUT").Item(0).SetAttribute("VALUE", "user123")

Me.WebBrowser1.Document.Forms(0).GetElementsByTagName("INPUT").Item(1).SetAttribute("VALUE", "pass123")

 

What i dont know is how to perform a click to the submit button. This is its html code:

<INPUT TYPE="SUBMIT" VALUE="SEND" NAME="PRIJAVA">

 

This code doesnt work:

wBrowser.Document.Forms(0).InvokeMember("submit")

nor

wBrowser.Document.Forms(0).InvokeMember("PRIJAVA")

 

 

I have a working code:

m_document = Me.WebBrowser1.Document

Dim user As MSHTML.HTMLInputElement = Nothing

Dim password As MSHTML.HTMLInputElement = Nothing

Dim login As MSHTML.HTMLInputElement = Nothing

Dim usercounter As Boolean = True

 

For Each element As HtmlElement In m_document.GetElementsByTagName("input")

If element.Name = "TELEFON" Then

If usercounter = True Then

user = element.DomElement

usercounter = False

End If

ElseIf element.Name = "SIFRA" Then

password = element.DomElement

ElseIf element.Name = "PRIJAVA" Then

login = element.DomElement

End If

Next element

user.value = "user123"

password.value = "pass123"

login.click()

 

But it uses MSHTML that i cant use later in compact framework.

 

Is there any other (easier) way to do this ?

Something like ...

Me.WebBrowser1.Document.Forms(0).GetElementsByTagName("INPUT").Item(1).PerformClick

Answer 1

There may be a better way!

However, when faced with a similar problem I used an SSL secured web service to -

1.       Authenticate the user with the current app credentials

2.       Return a one time use security token (with limited lifetime validity specified in milliseconds)

3.       Passed that token as a parameter to the login page

4.       The login page checked for the token parameter

5.       Retrieved the associated user

6.       Deleted the one time use key

7.       Authenticated browser based on appropriate user

Rgds

Answer 2

In a simple case when "login" element only submits the form you can use:

Me.WebBrowser1.Document.Forms(0).submit

Answer 3

take a look at this too:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=967938&SiteID=1