threading and control.incoke problem

[Hauer Wolfgang]

Hi!

I have an baseclass in the full framework wich encapsulates threading.
Recently i have expanded it for throwing an event when the thread has
finished. Because the event runs on the calling thread, i make a
control.invoke(delegate). This runs fine in the full framework, but crashes
with an argument-exception in cf.
Has someone an idea what could be wrong?
Thanks-Danke Wolfgang
-------------------->
Imports System.Windows.Forms
Public MustInherit Class ThreadWrapperBase
Public ReadOnly Thread As System.Threading.Thread
Private bmDone As Boolean
Protected Event ThreadDone(ByVal Sender As Object)
Private omControl As Control
Delegate Sub ThreadDoneDelegate()
Private MyThreadDoneDelegate As ThreadDoneDelegate = New
ThreadDoneDelegate(AddressOf LocalThreadDone)

Public Property Control() As Control
Get
Return omControl
End Get
Set(ByVal Value As Control)
omControl = Value
End Set
End Property

Sub New()
Me.Thread = New System.threading.Thread(AddressOf RunThread)
End Sub

Sub New(ByVal InvokerControl As Control)
Me.New()
omControl = InvokerControl
End Sub

Overridable Sub Start()
Me.Thread.Start()
End Sub

Private Sub RunThread()
bmDone = False
OnStart()
bmDone = True
if Not omControl Is Nothing Then
omControl.Invoke(MyThreadDoneDelegate)
###############> Problem is here
###################################################################################
Else
LocalThreadDone()
End If
End Sub
ReadOnly Property Done() As Boolean
Get
Return bmDone
End Get
End Property
Private Sub LocalThreadDone()
RaiseEvent ThreadDone(Me)
End Sub
Protected MustOverride Sub OnStart()
End Class

 

[Alex Feinman [MVP]]

All Control.Invoke targets in CF must use EventHandler signature:
void Handler(object, EventArgs)

 

[Daniel Moth]

The limitations of the NETCF Control.Invoke along with workarounds are
described here:
http://www.danielmoth.com/Blog/2004/10/invoke-cf-and-full-fx.html

Since you are already wrapping thread usage and Invoke in a class I suggest
you use the BackgroundWorker instead:
http://www.danielmoth.com/Blog/2004/12/backgroundworker-for-cf-10.html

Cheers
Daniel

 

[Hauer Wolfgang]

Tks, i think that will work

wolfgang

All Control.Invoke targets in CF must use EventHandler signature:
void Handler(object, EventArgs)