How can I change message in DuplexSessionChannel (tcpTransport) in WCF custom channel? - wcf

Question

I implement IDuplexSessionChannel on my Custom Channel because I use tcpTransport. In that custom channel, I cache service call response(client side caching). But it has errors. In IRequestChannel it works fine. How can I change message in TryMessage method. My code :
public Message Receive(TimeSpan timeout)
{
Message response = null;
response = CommunicationCacheManager.Get(_request.Headers.Action, _request);
if (response == null)
{
response = this.InnerChannel.Receive(timeout);
int cacheTimeout = 0;
if (response.Headers.FindHeader(Constants.CacheTimeOutHeader.NAME, Constants.CacheTimeOutHeader.NAMESPACE) > -1)
{
cacheTimeout = response.Headers.GetHeader<int>(Constants.CacheTimeOutHeader.NAME, Constants.CacheTimeOutHeader.NAMESPACE);
}
if (cacheTimeout > 0 && response != null &&
!response.IsFault &&
!response.IsEmpty)
{
CommunicationCacheManager.Add(_request.Headers.Action, cacheTimeout, ref response);
}
}
return response;
}
public Message Receive()
{
return this.InnerChannel.Receive();
}
public bool TryReceive(TimeSpan timeout, out Message message)
{
ThrowIfDisposedOrNotOpen();
message = null;
bool timedout = false;
try
{
message = this.Receive(timeout);
}
catch (TimeoutException)
{
timedout = true;
}
return (!timedout);
}
CacheManager works. And I get the response Cache. But tryReceive run again and when I look Message. Message is closed. How can I fix that

Answer 1

Problem is solved.
Tcp Binding add RelatesTo Header to Message. So code is changed to
public Message Receive(TimeSpan timeout)
{
Message response = null;
response = CommunicationCacheManager.Get(_request.Headers.Action, _request);
if (response == null)
{
response = this.InnerChannel.Receive(timeout);
int cacheTimeout = 0;
if (response.Headers.FindHeader(Constants.CacheTimeOutHeader.NAME, Constants.CacheTimeOutHeader.NAMESPACE) > -1)
{
cacheTimeout = response.Headers.GetHeader<int>(Constants.CacheTimeOutHeader.NAME, Constants.CacheTimeOutHeader.NAMESPACE);
}
if (cacheTimeout > 0 && response != null &&
!response.IsFault &&
!response.IsEmpty)
{
CommunicationCacheManager.Add(_request.Headers.Action, cacheTimeout, ref response);
}
}
else
{
response.Headers.RelatesTo=_request.Header.MessageId;
}
return response;
}