wpf webbrowser add handler for clicked links in vb.net

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I have a VB.NET forms application that uses the webcontrol to show a local html page with music album covers. All covers contain a link to a local text file. I added a handler to the linkcollection, so that when clicking on a cover, a subroutine reads the text file and adds its content to a music player. This works flawlessly.

However, I am now converting this application to WPF, and I have been trying to add a handler to the WPF webcontrol for days now, but just don't get it to work.

Googling only gives me C++ examples that I am only able to convert partially to VB.NET.

The code I have so far:

VB

Private Sub WhatsNewBrowser_LoadCompleted(sender As Object, e As NavigationEventArgs) Handles WhatsNewBrowser.LoadCompleted
        Dim doc As mshtml.HTMLDocumentClass = WhatsNewBrowser.Document 

        For Each link As mshtml.IHTMLElement In doc.links
            Dim anchor As mshtml.HTMLAnchorElement = link
            If Not anchor Is Nothing Then
                Dim handler As mshtml.HTMLAnchorEvents_Event = anchor
                If Not handler Is Nothing Then
                    ''what code goes here to run a sub onclick? The sub     
                    ''obviously needs to know what link is clicked.
                End If
            End If
        Next

    End Sub

This code does not work and I have no idea what to change.
What am I doing wrong and how do I create the handler to run the sub.

Thanks in advance!

Posted 16-Nov-14 8:46am

fanoftheplanet

Updated 16-Nov-14 8:49am

v2

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Sheepings · Accepted Answer · 2014-11-16T12:30:00

A handler is created as follows:

VB

AddHandler eventargs, AddressOf subroutine

. I.e. AddHandler TextBox1.KeyDown, AddressOf MySub

Of course, you need to have a subroutine called MySub for this example, and from here you add the code you want to do the work for that event to that subroutine (MySub). See Adding Handlers.

How to Pass Values to Subroutines will demonstrate how you can send values to other subroutines from your Link declaration in your For Each Loop.

Your For Loop belongs in the Navigating EventArgs subroutine.

From there, you can check the URL that's been navigated to. (Obviously you would only be navigating if you click a link, so this is the correct sub to use).

Because the WebBrowser control raises the Navigating event when it's about to navigate to a new page and it will fire the Navigated event when it has started navigating to a new page.

Using these events will allow you to check the link that was clicked in your loop, against where you are navigating to. However, by using the navigating and navigated event args, you don't need a loop.

Hope this helps.