Hey Everyone,
Alright, now I cannot get this to work, I may be dumb and don't see it, but
sickness will do that every now and then.
So I have a program with 4 threads performing unique operations. Syncing
isn't really important in this, just 4 different watches that happen.
So anyways, these "watchers" are on these threads, all raise an event called
LogEvent to the main thread. LogEvent is in a module so it can be called
from anywhere (as long as its imported of course).
However, I want to hook into the shared event of LogEvent (called Notify) on
my main thread, and take some of the information that happens from this
shared event and post it on a form.
However, I keep getting an error that it can't invoke across threads.
However, I think I have done everything, but maybe I'm missing something.
here is the event handler code.
Private Sub frmMain_Load(By Val sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
AddHandler Logger.EventLog ger.Notify, AddressOf EvtLog
End Sub
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
End Sub 6 1189
WOW!!! Thats, Thats, Thats, WOW!!!
Wise man once said "keep it simple, stupid!"
OK, No Realy. If you need to use 4 threads then go for it
but i wouldent recommend distributing that. you could use
array and a variable and when the variable is changed
then update your treeview with the array. -----Original Message----- Hey Everyone,
Alright, now I cannot get this to work, I may be dumb
and don't see it, butsickness will do that every now and then.
So I have a program with 4 threads performing unique
operations. Syncingisn't really important in this, just 4 different watches
that happen. So anyways, these "watchers" are on these threads, all
raise an event calledLogEvent to the main thread. LogEvent is in a module so
it can be calledfrom anywhere (as long as its imported of course).
However, I want to hook into the shared event of
LogEvent (called Notify) onmy main thread, and take some of the information that
happens from thisshared event and post it on a form.
However, I keep getting an error that it can't invoke
across threads.However, I think I have done everything, but maybe I'm
missing something. here is the event handler code.
Private Sub frmMain_Load(By Val sender As System.Object,
ByVal e AsSystem.EventAr gs) Handles MyBase.Load
AddHandler Logger.EventLog ger.Notify, AddressOf EvtLog
End Sub
Private Sub EvtLog(ByVal sender As Object, ByVal e As
Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes. Add(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
End Sub
.
Hey Fregus,
Yea I saw that, however didn't quite explain it. I think what I'm looking
for is an explanation of how control.Invoke works. Or at least a little
more about what that means in respects to a class.
I have a class that spins off the threads (which I don't appreciate someone
calling me "stupid" for no reason. If I could have used arrays, I would
have, but I couldn't because of time issues... jacka**). anyways, these
threads raise an event logger, in which case I had a handler in my main
thread to handle anytime this shared event was fired.
So I have a DLL called Logger.dll, all shared properties/methods. Different
classes/components call this dll and its methods, primarly logEvent (sender
as object, e as LogEventArgs).
There is a public shared event called Notify, in which the main form
(frmMain) monitors. Now this works fine, the events fire, etc. However, if
you fire from another thread (IE, thread 2 calls LogEvent, which fires
Notify) it says there is an error about crossing threads and to use
control.invoke instead.
Thats what is confusing me. Does this make anymore sense?
thanks,
CJ
"Fergus Cooney" <fi******@tesco .net> wrote in message
news:uS******** *****@TK2MSFTNG P11.phx.gbl... Hi CJ,
Do you remember that Topic: newbie thread mishap that you replied to earlier today? Herfried and I posted there as well. Your problem may be similar. Your solution may be the same.
Hope so anyway. :-)
Regards, Fergus
Hi Chris,
Wow was using the full version of an acronym KISS that is often used in
training companies. "keep it simple, stupid!". I hate it - the entire
usefulness of the concept just gets wiped away by the insult at the end. ;-)
The whole problem does make more sense. It may be useful to see your
thread-spinner class and one of these threads (assuming the 4 are similar). If
possible, maybe you could post a project? If you don't want to post it here,
you may send it direct - my email is valid.
I'm going out right now and will be back in a few hours. I'd like to look
into this in depth and get a decent grasp of the concepts here.
Someone may have answered you in the meantime but in the words of Arnie..
"I'll be back"
Regards,
Fergus
Alright, So I've been screwing with this using method invoker to execute a
method on an underlying window handle.
However I have ...
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
Me.tv_Events.In voke(Nodes.Add, tv_Node)
End Sub
And I'm getting an error on Nodes.Add in the me.tv_Events.In voke saying that
Nodes is private and cannot invoke the Add command. Suggestions?
Thanks,
CJ
"CJ Taylor" <no****@blowgoa ts.com> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. Hey Everyone,
Alright, now I cannot get this to work, I may be dumb and don't see it,
but sickness will do that every now and then.
So I have a program with 4 threads performing unique operations. Syncing isn't really important in this, just 4 different watches that happen.
So anyways, these "watchers" are on these threads, all raise an event
called LogEvent to the main thread. LogEvent is in a module so it can be called from anywhere (as long as its imported of course).
However, I want to hook into the shared event of LogEvent (called Notify)
on my main thread, and take some of the information that happens from this shared event and post it on a form.
However, I keep getting an error that it can't invoke across threads. However, I think I have done everything, but maybe I'm missing something.
here is the event handler code.
Private Sub frmMain_Load(By Val sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load
AddHandler Logger.EventLog ger.Notify, AddressOf EvtLog
End Sub
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args) Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
End Sub
Never mind... got it...
"CJ Taylor" <no****@blowgoa ts.com> wrote in message
news:eq******** ******@TK2MSFTN GP12.phx.gbl... Alright, So I've been screwing with this using method invoker to execute a method on an underlying window handle.
However I have ...
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
Me.tv_Events.In voke(Nodes.Add, tv_Node)
End Sub
And I'm getting an error on Nodes.Add in the me.tv_Events.In voke saying
that Nodes is private and cannot invoke the Add command. Suggestions? Thanks,
CJ "CJ Taylor" <no****@blowgoa ts.com> wrote in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. Hey Everyone,
Alright, now I cannot get this to work, I may be dumb and don't see it, but sickness will do that every now and then.
So I have a program with 4 threads performing unique operations.
Syncing isn't really important in this, just 4 different watches that happen.
So anyways, these "watchers" are on these threads, all raise an event called LogEvent to the main thread. LogEvent is in a module so it can be
called from anywhere (as long as its imported of course).
However, I want to hook into the shared event of LogEvent (called
Notify) on my main thread, and take some of the information that happens from this shared event and post it on a form.
However, I keep getting an error that it can't invoke across threads. However, I think I have done everything, but maybe I'm missing
something. here is the event handler code.
Private Sub frmMain_Load(By Val sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load
AddHandler Logger.EventLog ger.Notify, AddressOf EvtLog
End Sub
Private Sub EvtLog(ByVal sender As Object, ByVal e As
Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
End Sub
Delegate Sub AddEventNodeDel egate (ByVal e As Logger.LogEvent Args)
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args)
tv_Events.Invok e(new AddEventNodeDel egate(AddressOf AddEventNode), New
Object() {e})
End Sub
Private Sub AddEventNode (ByVal e as Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
tv_Events.Nodes .Add(tv_Node)
End Sub
"CJ Taylor" <no****@blowgoa ts.com> wrote in message
news:eq******** ******@TK2MSFTN GP12.phx.gbl... Alright, So I've been screwing with this using method invoker to execute a method on an underlying window handle.
However I have ...
Private Sub EvtLog(ByVal sender As Object, ByVal e As Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
Me.tv_Events.In voke(Nodes.Add, tv_Node)
End Sub
And I'm getting an error on Nodes.Add in the me.tv_Events.In voke saying
that Nodes is private and cannot invoke the Add command. Suggestions? Thanks,
CJ "CJ Taylor" <no****@blowgoa ts.com> wrote in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. .. Hey Everyone,
Alright, now I cannot get this to work, I may be dumb and don't see it, but sickness will do that every now and then.
So I have a program with 4 threads performing unique operations.
Syncing isn't really important in this, just 4 different watches that happen.
So anyways, these "watchers" are on these threads, all raise an event called LogEvent to the main thread. LogEvent is in a module so it can be
called from anywhere (as long as its imported of course).
However, I want to hook into the shared event of LogEvent (called
Notify) on my main thread, and take some of the information that happens from this shared event and post it on a form.
However, I keep getting an error that it can't invoke across threads. However, I think I have done everything, but maybe I'm missing
something. here is the event handler code.
Private Sub frmMain_Load(By Val sender As System.Object, ByVal e As System.EventArg s) Handles MyBase.Load
AddHandler Logger.EventLog ger.Notify, AddressOf EvtLog
End Sub
Private Sub EvtLog(ByVal sender As Object, ByVal e As
Logger.LogEvent Args)
Dim tv_Node As TreeNode
tv_Node = New TreeNode(e.Even tDate)
tv_Node.Tag = e.Source
tv_Node.Nodes.A dd(e.Source)
' Me.tv_Events.No des.Add(tv_Node )
End Sub
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