| Author: RamarajSundaram 19 Dec 2006 | Member Level: Diamond | Rating:  Points: 2 |
refer the following link,
http://msdn.microsoft.com/webservices/
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| Author: Nishad 03 Jun 2008 | Member Level: Silver | Rating: Points: 2 |
WCF is the Windows Communication Foundation which is shipped along with Dot Net 3.0/3.5. User's having 2.0 framework can make use of WCF by installing the MS add-in component for WCF. WCF comes up as a replacement for Remoting and Web service in dotnet. The main feature of WCF is it's security. It can use the protocols like basice,wsHttp,tcp...wsHttp comes with default windows based security feature. WRT web services WCF works with the industry standard Contract based protocols. The componets WCF are data contract, Service Contract and the Service programme. WCF also supports many of the advanced WS-* Web service standards, which can provide rich Web service communication across platforms. WCF can be extended to use protocols other than SOAP to communicate with Web services, for example, Rich Site Summary (RSS). It is interoperable with WSE 3.0, System.Messaging, .NET Enterprise Services, and ASMX Web services.
This means that, with little or no change to code, existing applications that are built with these technologies can interoperate with WCF services. WCF contracts define the behavior of WCF services. They are created in code by service developers, and are exposed to clients in the service metadata. The five types of contracts:
Service Contracts
Operation Contracts
Data Contracts
Message Contracts
Fault Contracts
WCF is flexible because its services can be hosted in different types of applications. The following lists several common scenarios for hosting WCF services:
IIS
WAS
Self-hosting
Managed Windows Service
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