Overview of WCF

Overview of WCF
Written by Sagar RabidasNovember 22, 2021
9 min read
Sagar Rabidas

Software Developer

Now we see some overviews on WCF.

Windows Communication Foundation(WCF):-

I'm going to talk about a number of the getting to know related subjects of WCF in my series of upcoming articles which enable you on your real international utility development. With the help of this article, I'm able to just going to introduce the new characteristic of asp.Net three.5 that is WCF. The overall shape of WCF is windows verbal exchange foundation which means it is impartial offerings hosted on some web server for the reusability inside your internet application by adding internet reference which makes a developer paintings very clean.

You've got seen the verbal exchange of internet software, right here in this article I am going to reveal how one software communicates with other. Following are a few listings of capabilities of WCF.

Features of WCF

WCF includes the following set of features. For more information, see WCF Feature Details.

  • Service Orientation

One consequence of using WS standards is that WCF enables you to create service-oriented applications. Service-oriented architecture (SOA) is the reliance on Web services to send and receive data. The services have the general advantage of being loosely coupled instead of hard-coded from one application to another. A loosely-coupled relationship implies that any client created on any platform can connect to any service as long as the essential contracts are met.

  • Interoperability

WCF implements modern industry standards for Web service interoperability. For more information about the supported standards, see Interoperability and Integration.

  • Multiple Message Patterns

Messages are exchanged in one of several patterns. The most common pattern is the request/reply pattern, where one endpoint requests data from a second endpoint. The second endpoint replies. There are other patterns such as a one-way message in which a single endpoint sends a message without any expectation of a reply. A more complex pattern is the duplex exchange pattern where two endpoints establish a connection and send data back and forth, similar to an instant messaging program. For more information about how to implement different message exchange patterns using WCF see Contracts.

  • Service Metadata

WCF supports publishing service metadata using formats specified in industry standards such as WSDL, XML Schema, and WS-Policy. This metadata can be used to automatically generate and configure clients for accessing WCF services. Metadata can be published over HTTP and HTTPS or using the Web Service Metadata Exchange standard. For more information, see Metadata.

  • Data Contracts

Because WCF is built using the .NET Framework, it also includes code-friendly methods of supplying the contracts you want to enforce. One of the universal types of contracts is the data contract. In essence, as you code your service using Visual C# or Visual Basic, the easiest way to handle data is by creating classes that represent a data entity with properties that belong to the data entity. WCF includes a comprehensive system for working with data in this easy manner. Once you have created the classes that represent data, your service automatically generates the metadata that allows clients to comply with the data types you have designed. For more information, see Using Data Contracts.

  • Security

Messages can be encrypted to protect the privacy and you can require users to authenticate themselves before being allowed to receive messages. Security can be implemented using well-known standards such as SSL or WS-SecureConversation. For more information, see Security.

Multiple means of transport and Encodings

Messages can be sent on any of several built-in transport protocols and encodings. The most common protocol and encoding are to send text encoded SOAP messages using the HyperText Transfer Protocol (HTTP) for use on the World Wide Web. Alternatively, WCF allows you to send messages over TCP, named pipes, or MSMQ. These messages can be encoded as text or using an optimized binary format. Binary data can be sent efficiently using the MTOM standard. If none of the provided transports or encodings suit your needs you can create your custom transport or encoding. For more information about transports and encodings supported by WCF see Transports.

  • Reliable and Queued Messages

WCF supports reliable message exchange using reliable sessions implemented over WS-Reliable Messaging and using MSMQ. For more information about reliable and queued messaging support in WCF see Queues and Reliable Sessions.

  • Durable Messages

A durable message is never lost due to a disruption in communication. The messages in a durable message pattern are always saved to a database. If a disruption occurs, the database allows you to resume the message exchange when the connection is restored. You can also create a durable message using the Windows Workflow Foundation (WF). For more information, see Workflow Services.

  • Transactions

WCF also supports transactions using one of three transaction models: WS-AtomicTransactions, the APIs in the System. Transactions namespace, and Microsoft Distributed Transaction Coordinator. For more information about transaction support in WCF see Transactions.

  • AJAX and REST Support

REST is an example of an evolving Web 2.0 technology. WCF can be configured to process "plain" XML data that is not wrapped in a SOAP envelope. WCF can also be extended to support specific XML formats, such as ATOM (a popular RSS standard), and even non-XML formats, such as JavaScript Object Notation (JSON).

  • Extensibility

The WCF architecture has several extensibility points. If the extra capability is required, several entry points allow you to customize the behavior of a service. For more information about available extensibility points see Extending WCF.

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