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  • Category: WCF

    About wcf

    Can somebody tell me what is wcf and why we use this and tell me how can i use this in my application in .net.
  • #576366
    Check out following link it will help you understand WCF

  • #576377
    WCF is used to support distributed computing where services are consumed

    by consumers.

    WCF includes the following set of features.

    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.


    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


    Messages can be encrypted to protect 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 Windows Communication Foundation Security.

    Multiple Transports and Encodings

    Messages can be sent on any of several built-in transport protocols and encodings. The most common protocol and encoding is to send text encoded SOAP messages using is 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 own custom transport or encoding. For more information about transports and encodings supported by WCF see Transports in Windows Communication Foundation.

    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 one that is never lost due to a disruption in the 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.


    WCF also supports transactions using one of three transaction models: WS-AtomicTtransactions, 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).


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



  • #576463
    Hi shailesh

    WCF(Windows Communication Foundation)WCF provides a runtime environment for services, enabling you to expose CLR types as services, and to consume other services as CLR types and it is part of .NET 3.0 and requires .NET 2.0, so it can only run on systems that support it.


    Muhammad Farooq
    (DNS Mentor)
    Visit My

  • #576475
    WCF stands fro "Windows Communication Foundation".The code name for wcf was Indigo.WCF service or component can be invoked by any protocol (like tcp,http etc) and transport type.wcf service are flexible.we develop wcf as contracts,interface,operations and data contracts.
    There are three major ways of hosting a Windows Communication Foundation service.
    1)Self hosting
    2)IIS Server
    3)WAS(Windows activation service).

    The main components of Windows Communication Foundation
    1)service class
    2)Hosting environment
    3)End point

    Thanks & Regards
    Nothing is mine ,Everything is yours!!!

  • #576808
    Thanks !!

    Please can you look following WCF query ...

    Thanks !!

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