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This article is about how to understand the application of WCF contract. I think it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it.

Now let's implement an application example of WCF contract. Let's combine the theory with the implementation. The process of communication between the client and the WCF service is shown in the figure:

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The client invokes the WCF service through the proxy, the proxy finds the specific service through the service address, and invokes and executes the specific service method. The code that defines the implementation of the WCF contract (Contract) includes the service contract IWCFService, the operation contract OperationContract, and the data contract DataContract. Specific WCF contract code:

The Code / / ServiceContract attribute and all other attributes used by Indigo are defined in the System.ServiceModel namespace, / / so the use statement is used at the beginning of this example to reference the namespace. NamespaceWCFService {/ / 1. Service contract [ServiceContract (Namespace= "http://www.cnblogs.com/frank_xl/")] publicinterfaceIWCFService {/ / Operation contract [OperationContract] stringSayHello (stringname); / / Operation contract [OperationContract] stringSayHelloToUser (Useruser);} / / 2. Service class, integration interface. Implementation contract publicclassWCFService:IWCFService {/ / implementation interface definition method publicstringSayHello (stringname) {Console.WriteLine ("Hello! {0}, Usingstring", name); return "Hello!" + name;} / / implementation interface definition method publicstringSayHelloToUser (Useruser) {Console.WriteLine ("Hello! {0} {1}, UsingDataContract", user.FirstName,user.LastName); return "Hello!"+ user.FirstName+"+ user.LastName;}} / / 3. The data contract / / is serialized into XML and encapsulated into the service as metadata. [DataContract] publicstructUser {[DataMember] publicstringFirstName; [DataMember] publicstringLastName;}} is how to understand the application of WCF contract. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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