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5: WCF Services in .NET Render code128b in .NET 5: WCF Services




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5: WCF Services using vs .net tomake ansi/aim code 128 with asp.net web,windows application iReport SOA PRINCIP VS .NET code128b LES & PATTERNS Two fundamental patterns that can be realized with the use of SOAP messages are Service Messaging [780] and Messaging Metadata [753], the latter of which directly relates to the usage and function of SOAP message headers. The message content structure itself is generally defined using XML Schema, which is often regulated by the application of Canonical Schema [718] together with the Standardized Service Contract (693), Service Loose Coupling (695), and Service Abstraction (696) principles.

. Message con tracts are a WCF mechanism used to exercise precise control over the processing of SOAP messages. Whenever a program needs to receive and process message content, it needs to undergo a complete data transformation in order for the underlying service logic to accept it and use it. The WCF API includes message-related classes that allow you to work at a very granular level.

These classes include MessageContract, MessageHeader and MessageBody, all of which are used as attributes to describe the structure of SOAP messages. In the following code listing, the XML schema produced by the MsgHeader data contract will appear in the SOAP header block. The MsgBody data contract will appear in the SOAP body.

. [DataContra ANSI/AIM Code 128 for .NET ct] public class MsgHeader { [DataMember] public string loginName; [DataMember] public string password; } [DataContract] public class MsgBody {. 5.2 Service Contracts with WCF [DataMember barcode 128 for .NET (Order=1)] public string name; [DataMember(Order=2)] public int phone; [DataMember(Order=3)] public int email; } [MessageContract] public class ContactMessage { [MessageHeader] public MsgHeader msgHeader; [MessageBody] public MsgBody msgBody; }. Example 5.8 To use the .NET Code 128 Code Set A MessageContract developed in Example 5.8, the parameter of the operation needs to be changed, as shown here:.

[ServiceCon tract] public interface IContactService { [OperationContract] public void InsertContact(ContactMessage contactMessage); }. Example 5.9 Prior to us ing the message contract, the SOAP message on the wire would exist as follows:. <S:Envelope> <S:Header> </S:Header> <S:Body> </S:Body> </S:Envelope> Example 5.10 The InsertC code-128b for .NET ontact operation would now create the following SOAP message:. <S:Envel ope> <S:Header> <S:loginName>user</S:loginName> <S:password>password</S:password> </S:Header> <S:Body> <S:name> ...

</S:name> <S:phone> ...

</S:phone> <S:email> ...

</S:email> </S:Body> </S:Envelope>. Example 5.11 5: WCF Services NOTE .NET versio n 3.5 SP1 expanded the reach of the data contract serializer by relaxing the need of having [DataContract]/[DataMember] on types and by supporting an interoperable mechanism for dealing with object references.

. Service End Code 128 Code Set B for .NET points and the endpoint Element The information required for a service consumer to invoke a given service is expressed with the endpoint element, which effectively establishes what is called a service endpoint. Specifically, a service endpoint contains the following parts: address the location of the service binding service invocation requirements (including information about security and reliability policies) contract a reference to the service contract that the service endpoint applies to Service endpoints (Figure 5.

4) abstract the underlying service logic and implementation. You are further able to choose which service operations from the service contract to explicitly or implicitly expose..

Figure 5.4 A service consumer communicates with the service using information provided by the endpoint..

SOAP request message service consumer address binding contract service address binding contract SOAP response message 5.2 Service Contracts with WCF The endpoin t construct can be configured in the Web.Config file or the App.Config file, as shown here:.

<system. .NET code 128 code set c serviceModel> <services> <service name="AccountService"> <endpoint name="EndPoint1" address="net.

tcp://localhost:1234" binding="netTcpBinding" contract="IAccount" /> </service> </services> </system.serviceModel>. Example 5.12 A single se .net framework barcode code 128 rvice can have more than one service endpoint. In the next example, the IAccount contract can be accessed on port 1234 using TCP, as well as port 8000 using HTTP:.

<system. serviceModel> <services> <service name="AccountService"> <endpoint name="EndPoint1" address="net.tcp://localhost:1234" binding="netTcpBinding" contract="IAccount" /> <endpoint name="EndPoint3" address="http://localhost:8000" binding="basicHttpBinding" contract="IAccount" /> </service> </services> </system.

serviceModel>. Example 5.13 NOTE The service barcode 128a for .NET endpoint, as expressed via the endpoint element, is further represented by the ServiceEndpoint class in WCF and is collectively comprised of an EndpointAddress class, a Binding class, and a ContractDescription class corresponding to the endpoint s address, binding, and contract..

Address 5: WCF Services Location tr ansparency is achieved using the endpoint address, which specifies where the service can be found, as well as the transport protocol used to communicate with it. The address attribute is assigned a Uniform Resource Identifier (URI), as follows:. [transport] code128b for .NET ://[domain or machine]:[optional port] net.tcp://localhost:1234.

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