WCF绑定(Binding)

一个Binding由一个有序的binding元素栈所组成，其中的每一个元素都指定了连接到ServiceEndpoint的一个方面。在这个栈中的最底两层都是必须要有的。最底下的一层是传输binding元素，在它之上是用于指定编码规范的binding元素。

一个Binding中的元素可以分为三类：协议、传输与编码， 它们分别可以指定如下信息：

• 协议栈元素指定诸如安全性、可靠性、上下文流设置（context flow settins）；
• 传输中指定底层的传输协议，如TCP或是HTTP。
• 编码中指定发送到ServiceEndpoint中的消息编码，如Text/XML, Binary或是MTOM。

WCF预定义了一些Binding，它们在互操作性（Interoperability)， 安全性(Security)， 是否支持会话(Session)， 是否支持事务(Transactions)和是否为全双工(Duplex)上各有不同。

Binding	Configuration Element	Description
BasicHttpBinding	basicHttpBinding Element	A binding that is suitable for communicating with WS-Basic Profile conformant Web Services, for example, ASMX-based services. This binding uses HTTP as the transport and Text/XML as the default message encoding.
WSHttpBinding	wsHttpBinding Element	A secure and interoperable binding that is suitable for non-duplex service contracts.
WSDualHttpBinding	wsDualHttpBinding Element	A secure and interoperable binding that is suitable for duplex service contracts or communication through SOAP intermediaries.
WSFederationHttpBinding	wsFederationHttpBinding element	A secure and interoperable binding that supports the WS-Federation protocol, enabling organizations that are in a federation to efficiently authenticate and authorize users.
NetTcpBinding	netTcpBinding Element	A secure and optimized binding suitable for cross-machine communication between WCF applications.
NetNamedPipeBinding	netNamedPipeBinding Element	A secure, reliable, optimized binding that is suitable for on-machine communication between WCF applications.
NetMsmqBinding	netMsmqBinding Element	A queued binding that is suitable for cross-machine communication between WCF applications.
NetPeerTcpBinding	netPeerTcpBinding element	A binding that enables secure, multi-machine communication.
MsmqIntegrationBinding	msmqIntegrationBinding element	A binding that is suitable for cross-machine communication between an WCF application and existing MSMQ applications.

Binding	Interoperability	Security (Default)	Session (Default)	Transactions	Duplex
BasicHttpBinding	Basic Profile 1.1	(None), Transport, Message,	None, (None)	(None)	n/a
WSHttpBinding	WS	Transport, (Message), Mixed	(None), Transport, Reliable Session	(None), Yes	n/a
WSDualHttpBinding	WS	(Message)	(Reliable Session)	(None), Yes	Yes
WSFederationHttpBinding	WS-Federation	(Message)	(None), Reliable Session	(None), Yes	No
NetTcpBinding	.NET	(Transport), Message	Reliable Session, (Transport)	(None), Yes	Yes
NetNamedPipeBinding	.NET	(Transport)	None, (Transport)	(None), Yes	Yes
NetMsmqBinding	.NET	Message, (Transport), Both	(None)	(None), Yes	No
NetPeerTcpBinding	Peer	(Transport)	(None)	(None)	Yes
MsmqIntegrationBinding	MSMQ	(Transport)	(None)	(None), Yes	n/a