Re: Displaying a popup from a windows service using .NET remoting
From: Ken Kolda (ken.kolda_at_elliemae-nospamplease.com)
Date: 01/28/05
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Date: Fri, 28 Jan 2005 15:22:12 -0800
Since your application displays a UI, the first question I'd have is this:
does this service need to be running when no one is logged into the server
to receive its messages?
If the answer is no, then you probably don't want a service or remoting --
you just want an app that launches on startup for a particular user. You'd
write you app and then add and reference to it in the
HKCU\Software\Microsoft\Windows\CurrentVersion\Run registry key for each
user.
If it needs to always be running, then you need two parts:
1) A Windows Service that acts as a remoting server.
2) A client UI piece that launches with each login (i.e. in the same
registry key I mentioned above) and acts as a remoting client.
When the UI piece starts up, it connects to the service and registers for
whatever events the server may raise (e.g. when a certain file is modified).
It then displays the UI as appropriate.
The reason you shouldn't have the UI be the server is two fold:
1) How will the service know when the UI is running (i.e. when someone is
logged in)? Would it try to connect to the UI every time an event occurs?
2) Your app wouldn't work in a terminal services environment since only a
single UI could listen on the specified server port. This may not be a big
issue for you, but something to note.
3) You could never use a remote client to connect to your server to
subscribe for events. Again, this may not be a big deal currently, but it
could be a design consideration.
Hope that helps -
Ken
"CBran" <cbrannon@ramquest.com> wrote in message
news:1106946406.083684.251220@c13g2000cwb.googlegroups.com...
> Hi, I'm working on developing a solution that requires me to display a
> notification to the user in the form of a winform, much like the MSN
> messenger popup or Norton 2004 popup. I am under the impression that
> these apps consist of 2 pieces (or 3 if you consider an interface the 2
> use) - a windows service that continually monitors for some event, and
> the winform app that appears (and disappears) when the event is
> received by the windows service. I think the winform app acts as the
> remoting server, and the windows service acts as the client that calls
> the server each time it wants the server to show the popup. I'm having
> a tough time finding a working example of a windows form that acts as
> remoting host and appears only when the windows service (remoting
> client) asks it to. Can anyone provide me with a simple example to
> show a form from a windows service using .NET remoting?
> Thanks so much,
> Chris
>
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