Classification: Public
I would love to see your code for that :) " Particularly if the user is going 
to see It, I try to give a message appropriate to the context with a "Details" 
button that displays the stack trace."

-----Original Message-----
From: John Cooper [mailto:jocoo...@jackhenry.com]
Sent: May-09-14 3:51 PM
To: General discussion about the WiX toolset.
Subject: Re: [WiX-users] Displaying custom error messages if deferred CA fails 
[P]

In general, this works well for Immediate custom actions (my custom actions 
follow a similar pattern).

However, for deferred actions, you're not going to be able to set (or get) 
properties.  That being said, logging still generally works.  The caveat is 
that custom actions hooked to DoAction in the UI aren't going to log very much. 
 But I work hard to NOT put any deferred actions in my UI.  I also try to make 
my deferred actions as simple and as short as I can manage.

The quality of log messages is up to you.  I prefer NOT to dump the exception 
stack trace in a dialog or log message unless I absolutely have to.  
Particularly if the user is going to see It, I try to give a message 
appropriate to the context with a "Details" button that displays the stack 
trace.

--
John Merryweather Cooper
Build & Install Engineer - ESA
Jack Henry & Associates, Inc.®
Shawnee Mission, KS  66227
Office:  913-341-3434 x791011
jocoo...@jackhenry.com
www.jackhenry.com


-----Original Message-----
From: Steven Ogilvie [mailto:steven.ogil...@titus.com]
Sent: Friday, May 9, 2014 2:27 PM
To: General discussion about the WiX toolset.
Subject: Re: [WiX-users] Displaying custom error messages if deferred CA fails 
[P]

Classification: Public
1. Have a MSI property set up that is empty If the custom action has an error 
populate the MSI property Display the error via a custom error dialog if the 
property is not empty?

2. Display the custom action error message in the Custom Action itself (as long 
as the MSI is not running silently)
i.e.: 
[CustomAction]
Public static ActionResult BackupMyDatabase(Session session) {
  Try
  {
    If (session == null}
    {
      Throw new ArgumentNullException("session");
    }
    
    // code to backup db
    
  }
  catch (Exception ex)
  {
    if (session != null)
    {
      session.Log("BackupMyDatabase failed: ");
      if (ex != null)
      {
        session.Log("Exception:");
        session.Log(ex.Message);
      }
      
      session.Message(
                InstallMessage.User + (int)MessageBoxIcon.Error
                + (int)MessageBoxButtons.OK,
                new Record { FormatString = "Setup could not back up the 
database: \nException: " + ex.Message });
    }
    
    return ActionResult.Failure;
  }
   
   if (session != null)
   {
     Session.Log("BackupMyDatabase succeeded...");
   }
   
   return ActionResult.Success;
}

-----Original Message-----
From: Soren Dreijer [mailto:dreijer+l...@echobit.net]
Sent: May-09-14 2:48 PM
To: General discussion for Windows Installer XML toolset.
Subject: [WiX-users] Displaying custom error messages if deferred CA fails

Hi all,

I've Googled and searched the WiX mailing list, but I haven't been able to 
figure this one out yet.

One of the biggest problems I've always had with MSIs is that they rarely 
return useful error messages. I'm using a custom bootstrapper and I'd like to 
display a custom error message if one of my deferred CA's fail.

Since deferred CA's are pretty limited, I don't know how to pass an error value 
or message back to the installer from the CA that I can then use to display the 
proper error UI.

What's the suggested approach? (I hope there's something better than setting a 
registry value.)

Cheers,
Soren
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