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  2. How to diagnose cause, fix, or work around Adobe ActiveX / COM related error 0x80004005 progmatically?

How to diagnose cause, fix, or work around Adobe ActiveX / COM related error 0x80004005 progmatically?

由 爷，独闯天下 提交于 2019-12-03 07:25:49

Ok, reporting back to answer my own question.

The problem was directly related to the setting for 'Display PDF in browser' in Preferences > Internet. With this option checked, the problem goes away. When it is unchecked, it comes back.

Here is how we propose to handle it programmatically:

    private string defaultPdfProg()
    { //Returns the default program for opening a .pdf file; On Fail returns empty string. 
      // (see notes below) 
        string retval = "";

        RegistryKey pdfDefault = Registry.ClassesRoot.OpenSubKey(".pdf").OpenSubKey("OpenWithList");
        string[] progs = pdfDefault.GetSubKeyNames();
        if (progs.Length > 0)
        {
            retval = progs[1];
            string[] pieces = retval.Split('.'); // Remove .exe

            if (pieces.Length > 0)
            {
                retval = pieces[0];
            }
        }

        return retval;
    }

    private void browserIntegration(string defaultPdfProgram)
    { //Test if browser integration is enabled for Adobe Acrobat (see notes below)
        RegistryKey reader = null;
        string[] vers = null;

        if (defaultPdfProgram.ToLower() == "acrobat")
        { //Default program is Adobe Acrobat
            reader = Registry.LocalMachine.OpenSubKey("Software").OpenSubKey("Adobe").OpenSubKey("Adobe Acrobat");
            vers = reader.GetSubKeyNames();
        }
        else if (defaultPdfProgram.ToLower() == "acrord32")
        { //Default program is Adobe Acrobat Reader
            reader = Registry.LocalMachine.OpenSubKey("Software").OpenSubKey("Adobe").OpenSubKey("Acrobat Reader");
            vers = reader.GetSubKeyNames();
        }
        else
        {
            //TODO: Handle non - adobe .pdf default program
        }

        if (vers.Length > 0)
        {
            string versNum = vers[vers.Length - 1].ToString();
            reader = reader.OpenSubKey(versNum);
            reader = reader.OpenSubKey("AdobeViewer",true);

            Boolean keyExists = false;
            Double keyValue = -1;
            foreach(string adobeViewerValue in reader.GetValueNames())
            {
                if (adobeViewerValue.Contains("BrowserIntegration"))
                {
                    keyExists = true;
                    keyValue = Double.Parse(reader.GetValue("BrowserIntegration").ToString());
                }
            }

            if (keyExists == false || keyValue < 1)
            {
                string message = "This application requires a setting in Adobe to be changed. Would you like to attempt to change this setting automatically?";
                DialogResult createKey = MessageBox.Show(message, "Adobe Settings", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1);
                if (createKey.ToString() == "OK")
                {
                    reader.SetValue("BrowserIntegration", 1, RegistryValueKind.DWord);
                    //test to make sure registry value was set
                }
                if (createKey.ToString() == "Cancel")
                {
                    //TODO: Provide instructions to manually change setting
                }
            }
        }
    }

A few items to note:

Does anyone know if these locations are interchangeable in all versions or if based on specific versions of Acrobat the registry key is in different locations? Does Reader follow the same logic as Acrobat?

  • Does Adobe use any other method to determine the 'default Adobe application for opening PDF files' other than the windows file association? I ask because if you have a non-adobe product, such as FoxIt installed as the default file association application, but are using the ActiveX control for Adobe on a machine that has both Reader and Acrobat installed, what logic is used to decide which application the COM object will talk to?

For my system (Windows XP, Adobe Reader 9.3.2) your solution didn't work (but gave me enough inspiration, THANK YOU!!)

private void browserIntegration(string defaultPdfProgram)
    {
        try
        {
            RegistryKey reader = null;
            string[] vers = null;

            #region Walters Versuch
            reader = Registry.CurrentUser.OpenSubKey("Software").OpenSubKey("Adobe");
            reader = reader.OpenSubKey("Acrobat Reader");
            vers = reader.GetSubKeyNames();
            if (vers.Contains<string>("9.0"))
            {
                reader = reader.OpenSubKey("9.0");
                reader = reader.OpenSubKey("Originals", true);
                if (reader.GetValueNames().Contains<string>("bBrowserIntegration"))
                    reader.SetValue("bBrowserIntegration", 1, RegistryValueKind.DWord);
                // wenn der Key fehlt ist Browserintegration auch angeschaltet
                // alternativ: reader.DeleteSubKey("bBrowserIntegration", false);
            }
            else
                MessageBox.Show(
                    "In case you run into problems later, please make sure yourself to select\n'Show PDF in Browser' in Acrobat Reader's Settings"
                    , "Unknown Version of Acrobat Reader");

            #endregion
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message + "\n" + ex.StackTrace
                + "\nIn case you run into problems later, please make sure yourself to select\n'Show PDF in Browser' in Acrobat Reader's Settings"
                , "Error while switching on 'Browserintegration' in 'Acrobat Reader'");
        }
}

Thank you so much!

I just want to add that I am able to reproduce the behaviour with Adobe Reader XI too. (Windows XP 32 bit - VB.net 2005.)

The registry key is(*):

HKEY_CURRENT_USER\Software\Adobe\Acrobat Reader\11.0\Originals\bBrowserIntegration

If that key value is 1, the activex component is correctly instantiated. If that key value is 0, I get the exception at form instantiation.

I was not able to find the browser integration option in Adobe Reader XI Internet properties page.

(*) I found that value on this page: http://forums.adobe.com/thread/1042774

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