Hey all,
This is probably a dumb question, but still feeling a little strange from
Labor day festiviities. Anyways,
I want a shared sub, at least something that is easy to call from any one of
my classes within the scope of my project (or that which inherits/imports
this class).
Basically, want them to be able to call a sub defined as
Public Shared Sub LogEvent (sender as object, e as
MWC.BCTransfer.Logger.LogEventArgs)
now tihs is fine... but if the UI is active, I want it to push information
to a listview I have.
Now I can call the LogEvent routine fine, but if I try to access a UI
function, I obviuosly can't.
How do I get around this?
Thanks,
CJ 5 3004
Hi,
You cannot call non shared members of a class from the shared method
without making an instance of it and then calling it on that instance.
Cheers
Benny
CJ Taylor wrote: Hey all,
This is probably a dumb question, but still feeling a little strange from Labor day festiviities. Anyways,
I want a shared sub, at least something that is easy to call from any one of my classes within the scope of my project (or that which inherits/imports this class).
Basically, want them to be able to call a sub defined as
Public Shared Sub LogEvent (sender as object, e as MWC.BCTransfer.Logger.LogEventArgs)
now tihs is fine... but if the UI is active, I want it to push information to a listview I have.
Now I can call the LogEvent routine fine, but if I try to access a UI function, I obviuosly can't.
How do I get around this?
Thanks, CJ
Thanks benny,
I was sure on that part, but does anyone know of a method to do this? Like
to write a good / simple event logger?
I suppose I could do inherited stuff, but I was hoping for something
simplier.
Thanks,
CJ
"Benny Mathew" <be***@mvps.org> wrote in message
news:%2****************@TK2MSFTNGP12.phx.gbl... Hi, You cannot call non shared members of a class from the shared method without making an instance of it and then calling it on that instance.
Cheers Benny
CJ Taylor wrote:
Hey all,
This is probably a dumb question, but still feeling a little strange
from Labor day festiviities. Anyways,
I want a shared sub, at least something that is easy to call from any
one of my classes within the scope of my project (or that which
inherits/imports this class).
Basically, want them to be able to call a sub defined as
Public Shared Sub LogEvent (sender as object, e as MWC.BCTransfer.Logger.LogEventArgs)
now tihs is fine... but if the UI is active, I want it to push
information to a listview I have.
Now I can call the LogEvent routine fine, but if I try to access a UI function, I obviuosly can't.
How do I get around this?
Thanks, CJ
> Now I can call the LogEvent routine fine, but if I try to access a UI function, I obviuosly can't.
How do I get around this?
Why would you want to? That's the real question... The fact that you hit a
wall is just an indicator that you are trying to break the rules of "good
OOP" design (or whatever). You have:
Logger.Log(o, e) - Takes in a source object, logs an event
This is the object you use for storing information, I would say that you are
trying to mix your data/information with your UI, and this is generally bad.
The alternative would be to log the information (storing it in however you
want), and then provide access to that log data via some shared Property or
Method, then your UI is still independant of your information:
Public Class Logger
Public Shared Sub LogEvent( sender as Object, e as LogEventArgs)
...
RaiseEvent LogAdded(...)
End Sub
Public Shared Property EntryCount as Integer
Public Default ReadOnly Shared Property Item(index as Integer) as
LogObject
End Class
Now when your list updates, it can just read the Item property of the
logger:
'// Client Code
ListView.BeginUpdate
ListView.Items.Clear
For I as Integer = 0 to Logger.EntryCount
ListView.Items.Add ( log )
Next
ListView.EndUpdate
What do you think?
~
Jeremy
Perfect Jeremy,
That was the goal, I was just struggling a little this morning to think
about how I wanted to do it...
Also, I think that because I'm doing this within a separated DLL, I'll do it
kinda like how MSCOMCTL was done in the past, where I will raise my own
dialogs as well, kinda like a built in UI to the DLL so its uniform, but
also make the Loglist (XML Data of the logged events) public readonly that
way other applications can get a handler on it, and add an event like you
said to say when its raised, another UI that is wrapping that DLL can be
notified, and therefore, pull updated event data...
I could see where this could become cumbersome (especially if you had large
amounts of Event Data), so maybe even add a property about 'last event
added." or something...
I don't know... thoughts?
-CJ
"Jeremy Cowles" <jeremy.cowles[nosp@m]asifl.com> wrote in message
news:uu***************@twister.tampabay.rr.com... Now I can call the LogEvent routine fine, but if I try to access a UI function, I obviuosly can't.
How do I get around this? Why would you want to? That's the real question... The fact that you hit
a wall is just an indicator that you are trying to break the rules of "good OOP" design (or whatever). You have:
Logger.Log(o, e) - Takes in a source object, logs an event
This is the object you use for storing information, I would say that you
are trying to mix your data/information with your UI, and this is generally
bad. The alternative would be to log the information (storing it in however you want), and then provide access to that log data via some shared Property
or Method, then your UI is still independant of your information:
Public Class Logger Public Shared Sub LogEvent( sender as Object, e as LogEventArgs) ... RaiseEvent LogAdded(...) End Sub
Public Shared Property EntryCount as Integer Public Default ReadOnly Shared Property Item(index as Integer) as LogObject End Class
Now when your list updates, it can just read the Item property of the logger:
'// Client Code ListView.BeginUpdate ListView.Items.Clear
For I as Integer = 0 to Logger.EntryCount ListView.Items.Add ( log ) Next
ListView.EndUpdate
What do you think?
~ Jeremy
> I could see where this could become cumbersome (especially if you had
large amounts of Event Data), so maybe even add a property about 'last event added." or something...
I don't know... thoughts?
You could create an [Before|After]LogEntryAdded event, and make the
EventArgs hold the data for the Entry that was added.
Public Sub logger_LogEntryAdded(o, e) handles x.x
List.Add( e.Entry.ToString( ) )
End Sub
?
~
Jeremy This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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