Reading PostData from WebBrowser

[robertybob]

Hi

I have a WebBrowser on a form. On loading, the browser finds an online login page.

After logging in via this page some postdata is generated, say forename and surname.

There should be a way to read this via BeforeNavigate2 but nothing seems to work. I've tried using WebBrowser and AxWebBrowser but can't find any code that reads the data. Outputting the URL doesn't help as the post data isn't part of the URL.

Apparently BeforeNavigate2 only works on AxWebBrowser in 2010 which only increases the confusion.

Anyone have any simple known working code that can grab the post data from an embedded browser in vb2010?

Many thanks

[Luk3r]

I actually used code from here http://stackoverflow.com/questions/1...in-vb-net-2010 and it seemed to work fine. I've included the code I used for a quick copy & paste so you can see if it suits your needs.

All I did in advance was set my WebBrowser1 URL in the properties window and added a multi-line textbox to see the output.

Imports System.IO
Imports System.Net
Imports System.Windows.Forms
 
 
Public Class Form1
    Private Sub WebBrowser1_Navigating(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserNavigatingEventArgs) Handles WebBrowser1.Navigating
        Dim req As WebRequest
        Dim res As WebResponse
        Dim postDataStream As Stream
        Dim webResponse As String = ""
 
        Try
            req = WebRequest.Create(e.Url.ToString)
            req.Method = "POST"
            res = req.GetResponse
            postDataStream = res.GetResponseStream
            Dim webStreamReader As New StreamReader(postDataStream)
            While webStreamReader.Peek >= 0
                webResponse = webStreamReader.ReadToEnd
            End While
            TextBox1.Text = webResponse.ToString
        Catch ex As Exception
            'do something for exceptions
        End Try
    End Sub
End Class

[robertybob]

Thx Luk3r,

I think I actually had a try with this but it seemed to output the code for the page rather than just the post data.

However I'll have a look tomorrow to see if that was a mistake on my part.

Just to clarify, if the online login page response posts ?forename=Bill&surname=Smith that's all I need to read.

Will see how it goes and will let you know once I've had time to have a look.

Many thanks

[robertybob]

I can confirm that this method grabs the page source rather than just postdata unfortunately.

[robertybob]

Ok I finally found something that works - but only because I know the name of the element I require. Not sure how to do this without that knowledge but for my purposes the following works.

Private Sub WebBrowser1_DocumentCompleted(sender As System.Object, e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        Dim thiselm As HtmlElement
        thiselm = WebBrowser1.Document.GetElementById("surname")
        If Not thiselm = Nothing Then TextBox1.Text = Uri.EscapeUriString(thiselm.GetAttribute("value").ToString)
    End Sub