edward
(vbCity Leader)
posts: 1481
since: Apr 8, 2001
from: Shropshire, England
http://www.vbcity.com/forums/topic.asp?tid=22075&highlight=beforenavigate&page=2
Hi,
As most 'unwanted' pop-ups occur during the 'OnLoad' event of the Body element, you can expand on cancelling the NewWindow by determining whether the document being loaded has completed:
Code:
Private Sub WebBrowser1_NewWindow2(ppDisp As Object, Cancel As Boolean)
If WebBrowser1.Document.ReadyState = "interactive" Then
' Probable Script 'OnLoad'
Cancel = True
Debug.Print "New Window: Blocked"
Else
' Check if an element has been activated
If WebBrowser1.Document.activeElement Is Nothing Then
' Probable Script
Cancel = True
Debug.Print "New Window: Blocked"
Else
' User selection likely
Debug.Print "New Window: Allowed"
End If
End If
End Sub
Private Sub Form_Load()
' Ensure the WebBrowser is silent. Cancelled pop-ups often throw a script error:
WebBrowser1.Silent = True
End Sub
Hope that helps
I'm not sure how you can get the NewWindow's target URL without allowing the new window to open.
One of the interesting things about the WebBrowser control is the number of ways you can achieve the same outcome. The expansion on the New Window routine is not elegant but hopefully it gives some indication of the range of possible reasons for a new window.
The code will redirect any Target="_blank" type navigation to the original window, but will allow user-activated links that are script based to open in a new window - this would probably be the point at which to implement a new form and RegisterAsBrowser code. An example is the 'Comment' link in a Microsoft KB article which uses javascript to open the target window.
Code:
Private Sub WebBrowser1_NewWindow2(ppDisp As Object, Cancel As Boolean)
Dim sLink As String
On Error Resume Next
If Not WebBrowser1.Document Is Nothing Then
If Not WebBrowser1.Document.parentWindow.event Is Nothing Then
If WebBrowser1.Document.parentWindow.event.Type = "MenuExtUnknown" Then
' CONTEXT MENU - NAVIGATE
' Get the URL of the source Element
sLink = WebBrowser1.Document.parentWindow.event.srcElement.href
Debug.Print "Context Menu: " & sLink
If Len(sLink) > 0 Then
' Cancel New Window
Cancel = True
' Force open in current window
WebBrowser1.Navigate sLink
End If
End If
Else
If WebBrowser1.Document.activeElement Is Nothing Then
' PROBABLE OnLoad SCRIPT - BLOCK
Debug.Print "Probable Script: Unknown"
Cancel = True
Else
sLink = WebBrowser1.Document.activeElement.href
If Len(sLink) > 0 Then
If WebBrowser1.Document.activeElement.protocolLong = "Unknown Protocol" Then
' PROBABLE SCRIPTED LINK - ALLOW - *** SET NEW FORM
Cancel = False
Else
' LINK WITH EXTERNAL TARGET - NAVIGATE
Debug.Print "External Link Target: " & sLink
Cancel = True
WebBrowser1.Navigate sLink
End If
Else
' UNKNOWN NEW WINDOW
Debug.Print "Unknown Reason: -"
Cancel = True
End If
End If
End If
Else
' PROBABLE SCRIPT - BLOCK
Cancel = True
End If
End Sub
The routine checks the protocol of the activeElement's link. Script based navigation will return 'Unknown Protocol'.
Hope that helps
