Error “This message cannot support the operation because it has been read”

Question

I have the same problem that is listed in the following thread.

WSDL first WCF server where client does not send SOAPAction

I performed the steps that are li

Answer 1

Dmitry Harnitski's answer does not work if you are debugging the service (It will give you a "This message cannot support the operation because it has been copied." error.)

This works even in debug mode:

XmlDictionaryReader GetReader(ref Message message)
{
    MessageBuffer buffer = message.CreateBufferedCopy(Int32.MaxValue);
    message = buffer.CreateMessage();
    newMessage = buffer.CreateMessage();
    XmlDictionaryReader rv = buffer.CreateMessage().GetReaderAtBodyContents();
    buffer.Close();
    return rv;
}

static System.ServiceModel.Channels.Message newMessage = null;
static System.ServiceModel.Channels.Message lastMessage = null;

public string SelectOperation(ref System.ServiceModel.Channels.Message message)
{
    try
    {
        if(message == lastMessage)
            message = newMessage;

        XmlDictionaryReader bodyReader = GetReader(ref message);

        lastMessage = message;

        XmlQualifiedName lookupQName = new XmlQualifiedName(bodyReader.LocalName, bodyReader.NamespaceURI);
        if (dispatchDictionary.ContainsKey(lookupQName))
        {
            return dispatchDictionary[lookupQName];
        }
        else
        {
            return null;
        }
    }
    catch(Exception ex)
    {
        throw ex;
    }
}