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This article mainly introduces "what is the principle of WCF binding". In daily operation, I believe many people have doubts about what the principle of WCF binding is. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "what is the principle of WCF binding?" Next, please follow the editor to study!

WCF binding belongs to the basic technical elements of WCF and is the basis of WCF communication processing. Knowing about binding is helpful in developing WCF applications. Because under different business requirements, there may be different requirements for communication methods, protocols, message coding and so on. Bindings need to be manipulated when configuring, publishing, and running services. Therefore, we must master the relevant attributes of the WCF built-in binding and be familiar with the relevant configuration of the binding elements. In addition, in some advanced applications, we also need to master the way of custom binding, understand the way and order of adding binding elements in custom binding, and understand the relevant properties and methods of the Binding base class. And classes related to the binding configuration. The WCF binding (Binding), the contract (Contract), and the address of the service (Address) are combined to form an endpoint (Endpoint).

Address is the network address of the Endpoint, which marks the destination of the message. Binding describes how to send messages, such as the transport protocol over which messages are sent (such as TCP,HTTP) and security (such as SSL,SOAP message security). Contract describes what the message contains, and how the message is organized and operated, such as one-way, two-way, or request / response. The introduction of endpoints can be said to be a great initiative of WCF, which makes it easier for us to publish and manage services, especially multiple services. Each service must have at least one endpoint, through which the client knows the relevant information about the service, such as address, message encoding format, transport protocol, and the content of the service, and then makes the correct call. The most special is that the same service can define multiple endpoints, each endpoint can be a different address, different WCF binding methods, in order to meet the different needs of multiple clients. As for the publisher of the service, we only need to manage the configuration of the endpoint to manage the service, which also facilitates the hosting of the service.

Service contract is the main processing object of WCF, and the definition and setting of service are realized through service contract. In addition to understanding the basic applications of ServiceContract and OperationContract, you also need to compare the differences between WCF service programming and ordinary .NET programming, such as how service inheritance and polymorphism are implemented. The most important thing is how to divide the boundary of the service and determine the granularity of the service according to the idea of SOA, which needs to be weighed from the aspects of ease of use, scalability, performance and so on.

The definition of operation in service contract is subject to many constraints, the most important of which is the processing of data, which is the purpose of data contract introduced by WCF. Because of the particularity of WCF, we need to understand the serialization of some special data types, such as generic types, collections, DataSet, and so on. The definition of constraining service operations also includes the handling of exceptions. WCF has a set of special handling methods for exceptions. According to the actual situation, you can determine whether the exception message needs to communicate, and whether it is required to stop the service instance or continue to maintain the session when an exception occurs. WCF provides a great deal of flexibility for messaging. It provides special Message classes and related readers, such as XmlDictionaryReader and XmlDictionaryWriter, to read and write messages, including operations on message version, encoding format, message header and body, etc. At the same time, WCF also provides mapping between messages and methods. When providing system interoperability, it is necessary to understand how WCF is messaging.

According to different requirements, WCF divides the instance pattern into three ways: PerCall,Single and PerSession. By setting the InstanceContextMode property of the service behavior to manage the life cycle of the service instance, you can simplify the work of the developer. We only need to understand the characteristics of these three instance patterns. In general, I recommend that the service use PerCall mode, and if you need to maintain a session between the service and the client, you can use PerSession mode. The Single mode can be used only if there are no significant requirements for performance and scalability.

Transaction processing, concurrent processing, and security are mainly set up and managed through related service behaviors. These contents are necessary for advanced WCF applications, especially for the development of enterprise-level application systems. As for the queue service, it mainly uses the message queue to enable the system to access the service offline and keep the service state synchronized.

At this point, the study on "what is the principle of WCF binding" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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