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Each of the frequently used bindings uses a different transport schema and encoding, as listed in Table Where multiple encodings are possible, the defaults are shown in bold. Having a text-based encoding typically enables a WCF service or client to communicate over HTTP with any other service or client , regardless of its technology and across firewalls.
In the case of IPC, since the call can never leave the client machine, the client can rest assured that the target machine is running Windows and has WCF installed on it. In the case of the TCP binding, while your application may need to interoperate with other applications written in other technologies, internally applications themselves do tend to be homogeneous.
As such, as long as your application spans only the local intranet, you can typically assume a homogenous Windows environment, without internal firewalls between machines.
Do not attempt to write a custom parser for it on other platforms. Microsoft reserves the right to change its format over time, in order to keep optimizing and evolving it. When choosing a binding for your service, you should follow the decision diagram shown in Figure The first question you should ask yourself is whether your service needs to interact with non-WCF clients.
If the client requires connected communication but could be calling across machine boundaries, choose the NetTcpBinding , which communicates over TCP. Most bindings work well even outside their target scenarios. However, do try to choose a binding according to Figure The context bindings described in Appendix B all derive from their respective regular bindings, adding support for a context protocol. The context protocol allows you to pass out-of-band parameters to the service.
The context bindings can also be used for durable services support, as described in Chapter 4. Finally, WCF defines six infrequently used bindings.
These bindings listed next are each designed for a specific target scenario and cannot easily be used outside that scenario. This book makes no use of these bindings, due to their somewhat esoteric nature:. Offered by the NetPeerTcpBinding class, this uses peer networking as a transport: the peer-network-enabled client and services all subscribe to the same grid and broadcast messages to it.
Peer networking is beyond the scope of this book, since it requires an understanding of grid topology and mesh computing strategies. Federated security is beyond the scope of this book, since by and large, the industry presently lacks good support both in technology and in business models for true federated scenarios.
I do expect federation to become mainstream as time goes by. Offered by the MsmqIntegrationBinding class, this is the analogous queued-world binding to the basic binding. This binding could be useful for a web-scripting client such as an AJAX page. Offered by the WSHttpBinding class, this binding derives from the WSHttpBinding class; it adds support for the emerging coordination standard, as well as updates for the transaction, security, and reliability standards.
Each binding offers literally dozens of configurable properties. There are three ways of working with bindings: you can use the built-in bindings as they are, if they fit your requirements; you can tweak and configure some of their properties, such as transaction propagation, reliability, and security; or you can write your own custom bindings. The most common scenario is using an existing binding mostly as it is, and merely configuring two or three of its aspects. Application developers will hardly ever need to write a custom binding, but framework developers may need to.
Skip to main content. Start your free trial. The Common Bindings. Tip The NetNamedPipeBinding class is named incorrectly, since the binding naming convention is to refer to the protocol, not the communication mechanism thus, we have NetTcpBinding rather than NetSocketBinding. Format and encoding. Table
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