Dynamic Load of Assembly - Event-Handler ???

[Stefan Rosenthal]

Hi all,

I've an OL-Style App loading MDIChild-Windows (Panes) on demand dynamicaly
at runtime.
Loading the Forms works fine but establishing an EventHandler (to receive
information from
the loaded Panes by the Container) fails with the Message "Cannot bind to
...." in the line where
the Delegate should be created.

The Sub should load the Assembly (WinForm) and establish an EventHandler to
the local Sub
"PlugInRequestB roker" which would handle the requested Action.

Has anyone an idea how the Event-Handle could be established (my first Try:
AddHandler ...
did not work).

Thx for any help!
Stefan Rosenthal

The Event is declared in an Interface which is implemented by the loaded
Assembly/Form.
The Sub "PlugInRequestB roker" is declared in the same class as
"LoadPaneFromAs sembly"
(in the MDIParent).

Code Snippet:

Private Function LoadPaneFromAss embly(ByVal pFile As String, ByVal pType As
String) As Object

Dim objPane As Object
Dim objAssembly As System.Reflecti on.Assembly
Dim objType As Type

Try
objAssembly = System.Reflecti on.Assembly.Loa dFrom(pFile)
objType = objAssembly.Get Type(pType)
objPane = System.Activato r.CreateInstanc e(objType)

' Event-Handler für Request-Event installieren
Try
Dim requestEvent As System.Reflecti on.EventInfo = _
objType.GetEven t("Request")
Dim eventHandlerInf o As System.Reflecti on.MethodInfo = _
Me.GetType.GetM ethod("PlugInRe questBroker")
Dim eventHandlerTyp e As System.Type = _
requestEvent.Ev entHandlerType
Dim requestDelegate As System.Delegate = _
System.Delegate .CreateDelegate (eventHandlerTy pe,
eventHandlerInf o, "PlugInRequestB roker") <= Failure !!!
requestEvent.Ad dEventHandler(M e, requestDelegate )
Catch ex As Exception
MsgBox(ex.Messa ge)
End Try

Catch ex As Exception
objPane = Nothing
MsgBox("Error in LoadPaneFromAss embly: " & ex.Message)
End Try

Return objPane

End Function