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Web Services
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WCF
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| Definition |
‘Web Service’ is a method of communicating over the WWW between two or more devices. |
WCF : ‘Windows Communication Foundation’ is a framework for building the Service Oriented Aplications. |
| Release |
Web Services was released with ASP.Net 2.0. |
WCF was released with .NET Framework 3.0. |
| Hosting |
ASP.Net web services are hosted in Internet Information Services : IIS. |
WCF is hosted in IIS ,WAS : Windows Activation Services, Windows service and also supports ‘Self-hosting’. |
File Extension
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Web Services in Asp.net have “.asmx” file extension. |
WCF have “.svc” file extension. |
| Protocol Supports |
ASP.Net web services accessed through HTTP : Hyper Text Transfer Protocol. |
WCF can be accessed through HTTP, TCP, MSMQ : Message Queuing and Point to Point (P2P). |
| Services |
Provides Security services. |
Not only supports security but also AJAX, REST, Reliable messaging, transactions |
| Multi-Threading |
Web Services does not support multi-threading. |
WCF supports multi-threading using “ServiceBehavior class”. |
| Serialization |
For data transformation web services use ‘XML serializer’ and namespace “System.XML.Serialization” |
For data transformation WCF uses ‘DataContractSerializer ‘ and namespace ‘System.RunTime.Serialization’. |
| Messaging |
Web services in Asp.Net use only SOAP : Simple Object Access Protocol for messaging. |
WCF uses SOAP (Default) but also support other protocols for messaging. |
| Performance |
Web services are slower than WCF. |
WCF is faster in compare to Web services. |
| Limited serialization |
Using web-services only public fields / Properties can be serialized and it can not serialize Hash table. |
WCF can serialize public / private fields as well as Hash Table. |
| Attributes |
Web service use [WebService] and [WebMethod] attributes. |
WCF uses [ServiceContraact] and [OperationContract] attributes. |
