Web Services And Msgbox

[Derek Hart]

I am using code in a VB.NET dll that is used for a winforms app, and calling
some of the routines from a web service. Even though the code never makes it
to a message box, message boxes are spread throughout some of these
routines. I seem to be getting an error randomly in the code, even though
the code should not generate an error:

"Showing a modal dialog box or form when the application is not running in
UserInteractive mode is not a valid operation. Specify the
ServiceNotification or DefaultDesktopOnly style to display a notification
from a service application."

Can I not just use a global variable to write out an audit log instead of
showing message boxes? Or are web services going to error just because a
message box is a possibility in the code?

Derek

[Scott M.]

Can I not just use a global variable to write out an audit log instead of

showing message boxes? Or are web services going to error just because a
message box is a possibility in the code?

There are two UI's that expose MessageBoxes:

1. A Windows client application (WinForms, Console)
2. A web client where the message box is provided in CLIENT code and
therefore rendered by the client (the browser).

Since a web service doesn't provide either of these UI's, you can't expect
the use of MessageBox.Show() to work.

If you would like to keep track of some data for the duration of the web
service for debuggin purposes, you could add: console.writeline(yourData)
and look at the output window as your code runs.

[Mr. Arnold]

"Derek Hart" <de********@yahoo.comwrote in message
news:eb**************@TK2MSFTNGP04.phx.gbl...

>I am using code in a VB.NET dll that is used for a winforms app, and
calling some of the routines from a web service. Even though the code never
makes it to a message box, message boxes are spread throughout some of
these routines. I seem to be getting an error randomly in the code, even
though the code should not generate an error:

"Showing a modal dialog box or form when the application is not running in
UserInteractive mode is not a valid operation. Specify the
ServiceNotification or DefaultDesktopOnly style to display a notification
from a service application."

Can I not just use a global variable to write out an audit log instead of
showing message boxes? Or are web services going to error just because a
message box is a possibility in the code?

If you want to debug like that, it's on your development machine, and it's a
workstation such a XP you're debugging on, the use the NETSEND in code
pointing back to the machine-name. The NETSEND will pop a message box on the
screen. I have used that to debug DLL(s) and tell me where I was at in code
execution and in NT service applications. I don't see why you couldn't do
that with a Web service that being developed on your workstation.