Have a friend mentioned the problem of event processing in transoting, I got, I found a few useful articles. Big bad guy DOTNET Remoting event Http://blog.joycode.com/joe/archive/2004/11/09/38437.aspx Create a distributed application structure based on Microsoft .NET Remoting Luxi http: // www .microsoft.com / china / community / column / 62.mspx thinking is simple, if you go to mimic writing one, it is easy to make mistakes. Probably the idea: the so-called subscription release model, one premise is that the program must be stateful. This is important, so it should be, so HTTP Web Service cannot directly implement the event model. For Remoting events, you must also ensure that the remote object is stateful. So if you activate the server, you must be a Singleton model. If SingleCall, you will find that there is no problem in program debugging. Event handler speakers are not in turn :) Be son is easy to encounter mistakes
An Unhandled Exception of Type 'System.Security.securityException' occurred in mscorlib.dll
Additional Information: Type System.delegateSerializationHolder and the Types derived from it (Such as system.delegateserizationHolder) Are Not Permitted to be Deserialized At this security level.
This problem is a big bad guy, as long as the TypefilterLevel for the Formatter channel in the program or hardcodes set the server CHANNELSINK. Such as code VB.NET
DIM
Chan2
AS
Httpchannel Chan2
=
New
Httpchannel
8086
)
DIM
IC
AS
IServerChannelSink
=
Chan2.channelsinkchain
While
NOT
(IC
IS
Nothing
)
IF
Typeof
(IC)
IS
SOAPSERVERFORMATTERSINK
THEN
Ctype
(IC, SOAPSERVERFORMATTERSINK) .TYPEFILTERLEVEL
=
Runtime.Serialization.Formatters.typefilterLevel.Full
End
IF
IF
Typeof
(IC)
IS
BinaryServerFormattersink
THEN
Ctype
(IC, binaryserverformattersink .typefilterLevel
=
Runtime.Serialization.Formatters.typefilterLevel.Full
End
IF
IC
=
Ic.nextChannelSink
End
While
C #
Httpchannel Chan2
=
New
Httpchannel
8086
IServerChannelSink SC
=
Chan2.channeelsinkchain;
While
(SC
! =
NULL
)
{If (sc is BinaryServerFormatterSink) {((BinaryServerFormatterSink) sc) .TypeFilterLevel = TypeFilterLevel.Full;} if (sc is SoapServerFormatterSink) {((SoapServerFormatterSink) sc) .TypeFilterLevel = TypeFilterLevel.Full;} sc = sc.NextChannelSink;} Of course, the server can set it with an easy-to-make mistake:
N unhandled exception of type 'system.runtime.remoting.remotingexception' occurred in mscorlib.dll
Additional Information: This Remoting Proxy Has No Channel Sink Which Means Either The Server Has No Registered Server Channels That Are Listening, Or this Application Has No Suitable Client Channel To Talk To The Server.
This will change the client's Channel port number to 0, so that the system will "toss".
DIM CHAN As httpchannel chan = new httpchannel (0)
