Hello,

I am trying to develop a dot net client server application.My
application works perfects on LAN..The problem arised when i tried to
host the remote object in a webserver.
The error i get is
" Type System.DelegateSerializationHolder and the types derived from
it (such as System.DelegateSerializationHolder) are not permitted to
be deserialized at this security level."
I am aware of the security issue in dotnet and am using
typefilterlevel.Full in both server and client.
I will paste my code for your reference

//code in server

public string StartHttpServer()
{
HttpChannel chnl;
retmsg="ok";
try
{
BinaryServerFormatterSinkProvider ServProv=new
BinaryServerFormatterSinkProvider();
ServProv.TypeFilterLevel=System.Runtime.Serializat ion.Formatters.TypeFilterLevel.Full;
BinaryClientFormatterSinkProvider ClientProv=new
BinaryClientFormatterSinkProvider();
IDictionary props=new Hashtable();
props["port"]=4444;
props["typeFilterLevel"] = "Full";
chnl=new HttpChannel(props,ClientProv,ServProv);
ChannelServices.RegisterChannel(chnl);
RemotingConfiguration.RegisterWellKnownServiceType (typeof(Remoting.Remotableobject),"Remotableobject .rem",WellKnownObjectMode.Singleton);
props.Clear();
props=null;
}
catch(Exception ex)
{
retmsg=ex.Message;
}
return retmsg;
}

//Code in Client


public ChatCenter(callbackclass callbackobj,Remotableobject
remfromLogin)
{
callback=callbackobj;
rem=remfromLogin;

IDictionary props=new Hashtable();
BinaryServerFormatterSinkProvider serv=new
BinaryServerFormatterSinkProvider();
BinaryClientFormatterSinkProvider cl=new
BinaryClientFormatterSinkProvider();
serv.TypeFilterLevel=System.Runtime.Serialization. Formatters.TypeFilterLevel.Full;

props["typeFilterLevel"] = TypeFilterLevel.Full;
props["port"]=0;

chnl=new HttpChannel(props,cl,serv);
ChannelServices.RegisterChannel(chnl);
props.Clear();
props=null;
try
{
rem= (Remoting.Remotableobject)
Activator.GetObject(typeof(Remoting.Remotableobjec t),server);

//Here the remote object returns the server ip without any problem.
MessageBox.Show(rem.checkConnectivity());

//The error is thrown from this statement
rem.eventRxText+=new ReceieveText(callback.rem_eventRxText);
rem.eventGtUsers+=new getusers(callback.rem_eventGtUsers);

}
catch(Exception ex)
{
MessageBox.Show(null,ex.Message,"Unable to reach
server",MessageBoxButtons.OK,MessageBoxIcon.Exclam ation);
System.IO.StreamWriter sr=new System.IO.StreamWriter(@"E:\dotnet\c#
\RemoteClient\log.htm",true);
sr.Write(ex.Message);
sr.Close();
}
}


Please somebody help me..
I am struggleing with this for one week.

Thanks in Advance

Here is my example that works:

Server:

BinaryClientFormatterSinkProvider clientProvider = new
BinaryClientFormatterSinkProvider();
BinaryServerFormatterSinkProvider serverProvider = new
BinaryServerFormatterSinkProvider();
serverProvider.TypeFilterLevel =
System.Runtime.Serialization.Formatters.TypeFilter Level.Full;

ht["name"] = string.Empty;
ht["port"] = 9000;
ht.Add("typeFilterLevel",
System.Runtime.Serialization.Formatters.TypeFilter Level.Full);

TcpChannel channel = new TcpChannel(ht, clientProvider,
serverProvider);
ChannelServices.RegisterChannel(channel);

string identifier = "Downloader";
WellKnownObjectMode mode = WellKnownObjectMode.Singleton;

WellKnownServiceTypeEntry entry = new
WellKnownServiceTypeEntry(typeof(ServerTalk),
identifier, mode);
RemotingConfiguration.RegisterWellKnownServiceType (entry);

Client:

BinaryClientFormatterSinkProvider clientProvider = new
BinaryClientFormatterSinkProvider();
BinaryServerFormatterSinkProvider serverProvider = new
BinaryServerFormatterSinkProvider();
serverProvider.TypeFilterLevel =
System.Runtime.Serialization.Formatters.TypeFilter Level.Full;
TcpChannel channel;
RemotingConfiguration.CustomErrorsEnabled(false);
System.Collections.IDictionary oChannelProperties = new
System.Collections.Hashtable();
oChannelProperties.Add("name", string.Empty);
oChannelProperties.Add("port", 0);
oChannelProperties.Add("typeFilterLevel",
System.Runtime.Serialization.Formatters.TypeFilter Level.Full);

channel = new TcpChannel(oChannelProperties,
clientProvider, serverProvider);

RemotingConfiguration.CustomErrorsEnabled(false);
if(RemotingConfiguration.CustomErrorsMode !=
CustomErrorsModes.Off)
RemotingConfiguration.CustomErrorsMode =
CustomErrorsModes.Off;


System.Runtime.Remoting.Channels.ChannelServices.R egisterChannel(channel,
false);