BeforeNavigate2 in an IE estension

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Hi all, I'm coding an extension for Internet Explorer.
I'de like to catch the IE beforenavigate event.
I do this in my code in this way:

After implementing IObjectWithSite interface, I define SetSite method as follow:

public void SetSite(object pUnkSite)
{
            
  // Release previous COM objects.
  if (this.site != null)
  {
     Marshal.ReleaseComObject(this.site);
  }
  if (this.explorer != null)
  {
     Marshal.ReleaseComObject(this.explorer);
     this.explorer = null;
  }
  // pUnkSite is a pointer to object that implements IOleWindowSite. 
  this.site = pUnkSite as NativeMethods.IInputObjectSite;
  if (this.site != null)
  {
     // The site implements IServiceProvider interface and can be used to 
     // get InternetExplorer instance.
     var provider = this.site as NativeMethods._IServiceProvider;
     Guid guid = new Guid("{0002DF05-0000-0000-C000-000000000046}");
     Guid riid = new Guid("{00000000-0000-0000-C000-000000000046}");
     try
     {
        //allochiamo il nostro browser e diciamo che è IE
        object webBrowser;
        provider.QueryService(ref guid, ref riid, out webBrowser);
        this.explorer = webBrowser as InternetExplorer;
        try
        {
                        
           //let's attach document complete
           explorer.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(explorer_DocumentComplete);
           //let's attach beforeNavigate
           explorer.BeforeNavigate2 += new DWebBrowserEvents2_BeforeNavigate2EventHandler(explorer_BeforeNavigate2);
        }
        catch (Exception ex)
        {
           listBox2.Items.Add(ex.Message);
        }
     }
     catch (COMException)
     {
     }
  }
}

And then I Implment my two attached events as follow:

C#

private void explorer_DocumentComplete(object pdisp, ref object URL)
{
   MessageBox.Show("DocumentComplete");
}

and

C#

private void explorer_BeforeNavigate2(object pDisp, ref object URL, ref object Flags, ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
{
   MessageBox.Show("BeforeNavigate");
}

What happens is that DocumentComplete event works and BeforeNavigate2 does not.

Where is my fault?

CAn anyone help me with this issue?

Thank you very much in advance,

Pietro

Posted 9-Mar-12 3:02am

Member 8353487

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Maculish · Answer 1 · 2015-10-22T16:32:00

Solution 2

I have get the problem,too. Did you get the solution?
https://support.microsoft.com/en-us/kb/325079[^]

Posted 22-Oct-15 16:32pm

Maculish

Comments

CHill60 23-Oct-15 9:34am

Did you not see the OP's post from 12-Mar-2012?

Member 8353487 · Answer 2 · 2012-03-12T05:55:00

I Followed this solution:
http://social.msdn.microsoft.com/Forums/nl-NL/ieextensiondevelopment/thread/20b16462-63bd-4df4-8f2f-900307252ede[^]

I implemented it as follows:

C#

public void SetSite(object pUnkSite)
{

    // Release previous COM objects.
    if (this.site != null)
    {
        Marshal.ReleaseComObject(this.site);
    }
    if (this.explorer != null)
    {
        Marshal.ReleaseComObject(this.explorer);
        this.explorer = null;
    }
    // pUnkSite is a pointer to object that implements IOleWindowSite.
    this.site = pUnkSite as NativeMethods.IInputObjectSite;
    if (this.site != null)
    {
        // The site implements IServiceProvider interface and can be used to
        // get InternetExplorer instance.
        var provider = this.site as NativeMethods._IServiceProvider;
        Guid guid = new Guid("{0002DF05-0000-0000-C000-000000000046}");
        Guid riid = new Guid("{00000000-0000-0000-C000-000000000046}");
        try
        {
            //allochiamo il nostro browser e diciamo che è IE
            object webBrowser;
            provider.QueryService(ref guid, ref riid, out webBrowser);
            this.explorer = webBrowser as InternetExplorer;

            //agganciamo document complete
            explorer.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(explorer_DocumentComplete);

            //agganciamo beforeNavigate
            axDocumentV1 = (WebBrowser_V1)this.explorer;
            axDocumentV1.BeforeNavigate += axDocumentV1_BeforeNavigate;

        }
        catch (COMException)
        {
        }
    }
}

I declared inside my class:

private SHDocVw.WebBrowser_V1 axDocumentV1;

Pietro