vb.net error while registering evevents

[shivkumar2004@gmail.com]

Hi!,

I am developing a chat system using vb.net in vs 2005. I am getting
the following error while registering the events.

error details: System.InvalidO perationExcepti on was unhandled
Message="An error occurred creating the form. See
Exception.Inner Exception for details. The error is: Type
System.Delegate SerializationHo lder and the types derived from it (such
as System.Delegate SerializationHo lder) are not permitted to be
deserialized at this security level."
Source="ChatApp lication"
StackTrace:
at ChatApplication .My.MyProject.M yForms.Create__ Instance__[T](T
Instance) in 17d14f5c-a337-4978-8281-53493378c1071.v b:line 190
at ChatApplication .My.MyProject.M yForms.get_Clie nt()
at ChatApplication .Client.Main() in C:\tests\chatSo l
\ChatApplicatio n\Client.vb:lin e 8
at System.AppDomai n.nExecuteAssem bly(Assembly assembly,
String[] args)
at System.AppDomai n.ExecuteAssemb ly(String assemblyFile,
Evidence assemblySecurit y, String[] args)
at Microsof

details:

'----------------------------------Client
Imports System.Runtime. Remoting.Channe ls.Http
Public Class Client
Inherits System.Windows. Forms.Form

Private theManager As InBetween.Manag er

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeCompo nent()

Dim chan As HttpChannel = New HttpChannel("0" )

System.Runtime. Remoting.Channe ls.ChannelServi ces.RegisterCha nnel(chan)

theManager =
CType(Activator .GetObject(Type .GetType("InBet ween.Manager,In Between"),
"http://localhost:7777/ChatApplication "), InBetween.Manag er)

AddHandler Me.theManager.e vtReceiveText, AddressOf
Me.HandleReceiv edMsg

end sub
#End Region

Sub HandleReceivedM sg(ByVal username As String, ByVal text As
String)
Me.txtReceivedM sgs.AppendText( username & " : " & text &
vbCrLf)
End Sub

end class

'-------------------------------------Server
Imports System.Runtime. Remoting.Channe ls
Imports System.Runtime. Remoting.Channe ls.Http
Imports System.Runtime. Remoting
Imports System
Imports InBetween

public class Server

Public Shared Sub Main()
Dim server1 As Server
server1 = New Server()
End Sub

Public Sub New()

Dim chan As IChannel = New HttpChannel(777 7)

ChannelServices .RegisterChanne l(chan)


System.Runtime. Remoting.Remoti ngConfiguration .RegisterWellKn ownServiceType( _
Type.GetType("I nBetween.Manage r, InBetween"), _
"ChatApplicatio n", WellKnownObject Mode.Singleton)

Dim Manager1 As New Manager()
Console.WriteLi ne("The Manager object's ID2:" &
Manager1.getHas h())
System.Console. WriteLine("Hit ENTER to exit...")

System.Console. ReadLine()

End Sub

end class

'-------------------------------------Manager

Imports System

Public Delegate Sub ReceiveText(ByV al username As String, ByVal text
As String)

Public Class Manager
Inherits MarshalByRefObj ect

Public Event evtReceiveText As ReceiveText

Public Overrides Function InitializeLifet imeService() As Object
Return Nothing
End Function

Public Function SendText(ByVal username As String, ByVal text As
String)
RaiseEvent evtReceiveText( username, text)
End Function

End Class


Howerver, I can call the methods of remoting object.

Its very very urgent and I tried lot to resolve but i could not solve
this problem.

Please someone help me out and please suggest me if there are
alternative ways to resolve this.

Thanks.
Shivkumar S.

[Phill W.]

Re: vb.net error while registering evevents

shivkumar2004@g mail.com wrote:

I am getting the following error while registering the events.
>
error details: System.InvalidO perationExcepti on was unhandled
Message="An error occurred creating the form. See
Exception.Inner Exception for details. The error is: Type
System.Delegate SerializationHo lder and the types derived from it (such
as System.Delegate SerializationHo lder) are not permitted to be
deserialized at this security level."

Remoting supports two "security levels" which controls the kinds of
objects that you can send across the "Great .Net Remoting Divide".
It sounds to me like you're running at the "lower" level, which only
supports basic, Framework-implemented types. You need to tell the
remoting server to use the "higher" one, so that you can serialise your
own Types as well.

I don't know which property it would be, but in the remoting
configuration file (which I use; I'm lazy) it would be specified as:


<system.runtime .remoting>
<application>
<channels>
<channel ref="tcp" port="12345">
<serverProvider s>
<formatter
ref="binary"
typeFilterLevel ="Full" <-- this one!
/>
. . .

HTH,
Phill W.