Customized binding

Question

Hi Can we create customized binding in WCF? If yes explain it?

Hemant Kumar · Answer

Hi please see this example where we have used the Custom Binding First let's code our service. We'll use a slimmed version of the code generated by the New / WCF Service Library template in Visual Studio 2008. using System; using System.ServiceModel; using System.Runtime.Serialization; namespace WcfServiceLibrary1 { [ServiceContract] public interface IService1 { [OperationContract] CompositeType GetDataUsingDataContract(CompositeType composite); } [DataContract] public class CompositeType { bool boolValue = true ; string stringValue = Hello  ; [DataMember] public bool BoolValue { get { return boolValue; } set { boolValue = value ; } } [DataMember] public string StringValue { get { return stringValue; } set { stringValue = value ; } } } public class Service1 : IService1 { public CompositeType GetDataUsingDataContract(CompositeType composite) { if (composite.BoolValue) { composite.StringValue += Suffix ; } return composite; } } } Let me point out that there is absolutely nothing in our code that says where we are going (the address) or how we are going to get there (the binding). This is simply the codified version of what we are going to say to each other in our distributed conversation (the contract). In other words we specify the data to be transmitted over the wire but we never say how it will be transmitted (encoded as text binary JSON or other) and where it will go (over HTTP TCP a queue a carrier pigeon's foot etc). That's what our configuration file achieves and this is one of the things I love about WCF. The developers focus on what the service is supposed to achieve and the operations / IT pro folks can focus on the infrastructure stuff. Now take a look at how we can configure the service to use a custom binding. I err on the side of verbosity here including the entire configuration file for easier understanding... this is how you configure the service . xml version =1.0 encoding =utf-8 ? > configuration > system.serviceModel > bindings > customBinding > binding name =myBinding> textMessageEncoding messageVersion =Soap11 /> httpTransport /> binding > customBinding > bindings > services > service behaviorConfiguration =WcfServiceLibrary1.Service1Behavior name =WcfServiceLibrary1.Service1> endpoint address = binding =customBinding bindingConfiguration =myBinding contract =WcfServiceLibrary1.IService1> endpoint > endpoint address =mex binding =mexHttpBinding contract =IMetadataExchange /> host > baseAddresses > add baseAddress =http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary1/Service1/ /> baseAddresses > host > service > services > behaviors > serviceBehaviors > behavior name =WcfServiceLibrary1.Service1Behavior> serviceMetadata httpGetEnabled =True/> behavior > serviceBehaviors > behaviors > system.serviceModel > configuration > Yeah it's verbose and my eyes are burning too just looking at all that XML. The part you should really focus on is the definition of myBinding which includes the textMessageEncoding and httpTransport elements. Notice that the textMessageEncoding element specifies the messageVersion attribute Soap11. There are multiple possible values for the messageVerision attribute: None - No SOAP just Plan Old XML. Soap11 - Uses SOAP 1.1. Soap12 - Uses SOAP 1.2. Soap11WSAddressing10 - Uses SOAP 1.1 and W3C Recommendation WS-Addressing 1.0 - Core Soap12WSAddressing10 - Uses SOAP 1.2 and W3C Recommendation WS-Addressing 1.0 - Core Soap11WSAddressingAugust2004 - Uses SOAP 1.1 and the legacy W3C submission for WS-Addressing . This is the same version of WS-Addressing that WSE 3.0 uses and is included for wire-level interop between WSE 3.0 and WCF. Soap12WSAddressingAugust2004 - Uses SOAP 1.1 and the legacy W3C submission for WS-Addressing . This is the same version of WS-Addressing that WSE 3.0 uses and is included for wire-level interop between WSE 3.0 and WCF. We are going to talk using basicHttpBinding which by default uses text encoding with SOAP 1.1 over HTTP. Last we need to configure the client. We can just use Add Service Reference in Visual Studio 2008 or use svcutil.exe and generate the client config ourselves. Or even easier we can write the client config ourselves and it will be much more compact than what VS2008 or svcutil generates. xml version =1.0 encoding =utf-8 ? > configuration > system.serviceModel > bindings /> client > endpoint address =http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary1/Service1/ binding =basicHttpBinding contract =IService1 name =CustomBinding_IService1 /> client > system.serviceModel > configuration > Nice and clean... we can simply use basicHttpBinding on the client because it does the exact same thing that our config on the service does... it talks SOAP 1.1 over HTTP using a text encoding. In fact we could replace our service's config with the following and it would not change behavior at all (because our custom binding is equivalent to the basicHttpBinding). xml version =1.0 encoding =utf-8 ? > configuration > system.serviceModel > services > service behaviorConfiguration =WcfServiceLibrary1.Service1Behavior name =WcfServiceLibrary1.Service1> endpoint address = binding =basicHttpBinding contract =WcfServiceLibrary1.IService1> endpoint > endpoint address =mex binding =mexHttpBinding contract =IMetadataExchange /> host > baseAddresses > add baseAddress =http://localhost:8731/Design_Time_Addresses/WcfServiceLibrary1/Service1/ /> baseAddresses > host > service > services > behaviors > serviceBehaviors > behavior name =WcfServiceLibrary1.Service1Behavior> serviceMetadata httpGetEnabled =True/> behavior > serviceBehaviors > behaviors > system.serviceModel > configuration >

Jaganathan Bantheswaran · Answer

Hi Yes we can. Here MSDN explains for you