WCF supports 3 ways for a client to call a service.<\/p>\n
Now to see all these things in action let’s create a service. <\/p>\n
let’s create a service, create a new project, take a Class Library template, name it OperationLib<\/strong>, let’s do some house keeping with the newly created project.<\/p>\n to keep the things simple, let’s assume that each interface defines only one method, which simply adds a passed value, to its member variable.<\/p>\n so let’s define interface for each service.<\/p>\n \/\/ Listing of IRequestReplyService.cs<\/font><\/strong><\/p>\n using System; namespace OperationLib \/\/ Listing of RequestReplyService.cs<\/font><\/strong><\/p>\n using System; namespace OperationLib \/\/ Listing of IOneWayCallService.cs<\/strong><\/p>\n using System; namespace OperationLib [OperationContract] }<\/font><\/p>\n \/\/ Listing of OneWayCallService.cs<\/strong><\/p>\n public class OneWayCallService : IOneWayCallService public void AddValue(double dblVal) public double GetResult() \/\/ Listing of IDuplexService.cs<\/strong><\/p>\n using System; namespace OperationLib [ServiceContract(CallbackContract = typeof(IDuplexServiceCallback))] \/\/ Listing of DuplexService.cs<\/strong><\/p>\n using System; namespace OperationLib Now to see all these things in action let’s create a service. <\/p>\n for the sake of simplicity, i have have hosted this service as a self hosted service, to create the Host application, create a new Console based application<\/strong>.<\/p>\n Before we write any code for the Host application, let’s define the configuration file for the Service(s).<\/p>\n <?xml version="1.0" encoding="utf-8" ?> <!–************************* Request Reply Service **************************** –><\/strong><\/font> <!\u2014******************** OnewayCall Service ************************* –> <service name="OperationLib.OneWayCallService" behaviorConfiguration="OneWayCallServiceBehavior<\/font><\/strong>"> <endpoint<\/strong> address="http:\/\/localhost:9013\/OneWayCallService<\/strong>" binding="wsHttpBinding<\/strong>" contract="OperationLib.IOneWayCallService"\/> <!\u2014********************* Duplex Service ***************************** –> <service name="OperationLib.DuplexService" behaviorConfiguration="DuplexServiceBehavior<\/font><\/strong>" > <endpoint<\/strong> address="http:\/\/localhost:9015\/DuplexService<\/strong>" binding="wsDualHttpBinding<\/strong>" contract="OperationLib.IDuplexService"\/> <\/services><\/font><\/p>\n <!– ********************************** behaviors ********************************** –> <behaviors> <!– Single Call Service Behavior –> <!–Single Session Service Behavior –> <!–Singleton Service Behavior –> Now let’s explain the configuration of each service.<\/p>\n <\/p>\n <service name="OperationLib.RequestReplyService" behaviorConfiguration="RequestReplyServiceBehavior<\/font><\/strong>"> >> to do <\/p>\n <!– ******************** Single Session Service ************************* –> <endpoint<\/strong> address="http:\/\/localhost:9013\/OneWayCallService<\/strong>" binding="wsHttpBinding<\/strong>" contract="OperationLib.IOneWayCallService"\/> >> to do <\/p>\n <!– ********************* Singleton Service ***************************** –> <endpoint<\/strong> address="http:\/\/localhost:9015\/DuplexService" binding="wsDualHttpBinding<\/strong>" contract="OperationLib.IDuplexService"\/> \n
Defining Interfaces<\/h4>\n
using System.Text;
using System.ServiceModel;<\/font><\/p>\n
{
[ServiceContract]
interface IRequestReplyService
{
[OperationContract]
double AddValue(double dblNum1, double dblNum2);
}
}
<\/font><\/p>\n
<\/font><\/strong><\/p>\n
using System.Text;<\/font><\/p>\n
{
public class RequestReplyService : IRequestReplyService
{
public double AddValue(double dblNum1, double dblNum2)
{
return (dblNum1 + dblNum2);
}
}
}<\/font><\/p>\n
using System.ServiceModel;
using System.Text;<\/font><\/p>\n
{
[ServiceContract(SessionMode = SessionMode.Required)]
interface IOneWayCallService
{
[OperationContract(IsOneWay = true)]
void AddValue(double dblNum );<\/font><\/p>\n
double GetResult();
}<\/font><\/p>\n
<\/font><\/strong><\/p>\n
{
private double m_dblResult = 0;<\/strong><\/font><\/p>\n
{
m_dblResult += dblVal;
}<\/strong><\/font><\/p>\n
{
return m_dblResult;
}
}<\/strong><\/font><\/p>\n
using System.ServiceModel;
using System.Text;<\/font><\/p>\n
{
interface IDuplexServiceCallback
{
[OperationContract]
void OnValueAdded(double dblNum1, double dblNum2, double dblResult);
}<\/font><\/p>\n
interface IDuplexService
{
[OperationContract()]
void AddValue(double dblNum1, double dblNum2);
}
}<\/font><\/p>\n
<\/font><\/strong><\/p>\n
using System.ServiceModel ;
using System.Text;<\/font><\/p>\n
{
public class DuplexService : IDuplexService
{
public void AddValue(double dblNum1, double dblNum2)
{
double dblResult = dblNum1 + dblNum2;
IDuplexServiceCallback callbackInstance = OperationContext.Current.GetCallbackChannel<IDuplexServiceCallback>();
callbackInstance.OnValueAdded(dblNum1, dblNum2, dblResult);
}
}
}<\/font><\/p>\nHosting the Service<\/h3>\n
<configuration>
<system.serviceModel>
<services>
<\/strong><\/font><\/p>\n
<service name="OperationLib.RequestReplyService" behaviorConfiguration="RequestReplyServiceBehavior<\/font><\/strong>">
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9011\/RequestReplyService"\/>
<add baseAddress="net.tcp:\/\/localhost:9012\/RequestReplyService"\/>
<\/baseAddresses>
<\/host>
<endpoint<\/strong> address="http:\/\/localhost:9011\/RequestReplyService<\/strong>" binding="wsHttpBinding<\/strong>" contract="OperationLib.IRequestReplyService"\/>
<endpoint<\/strong> address="net.tcp:\/\/localhost:9012\/RequestReplyService<\/strong>" binding="netTcpBinding<\/strong>" contract="OperationLib.IRequestReplyService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexTcpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<\/service><\/font><\/p>\n
<\/strong><\/font><\/p>\n
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9013\/OneWayCallService"\/>
<add baseAddress="net.tcp:\/\/localhost:9014\/OneWayCallService"\/>
<\/baseAddresses>
<\/host><\/font><\/p>\n
<endpoint<\/strong> address="net.tcp:\/\/localhost:9014\/OneWayCallService<\/strong>" binding="netTcpBinding<\/strong>" contract="OperationLib.IOneWayCallService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexTcpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<\/service>
<\/font><\/p>\n
<\/strong><\/font><\/p>\n
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9015\/DuplexService"\/>
<add baseAddress="net.tcp:\/\/localhost:9016\/DuplexService"\/>
<\/baseAddresses>
<\/host><\/font><\/p>\n
<endpoint<\/strong> address="net.tcp:\/\/localhost:9016\/DuplexService<\/strong>" binding="netTcpBinding<\/strong>" contract="OperationLib.IDuplexService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexTcpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<\/service><\/font><\/p>\n
<\/p>\n
<serviceBehaviors><\/font><\/p>\n
<behavior name="RequestReplyServiceBehavior<\/font><\/strong>">
<serviceMetadata httpGetEnabled="true"\/>
<serviceDebug includeExceptionDetailInFaults="true "\/>
<\/behavior><\/font><\/p>\n
<behavior name="OneWayCallServiceBehavior<\/font><\/strong>">
<serviceMetadata httpGetEnabled="true"\/>
<serviceDebug includeExceptionDetailInFaults="true "\/>
<\/behavior><\/font><\/p>\n
<behavior name="DuplexServiceBehavior<\/font><\/strong>" >
<serviceMetadata httpGetEnabled="true" \/>
<serviceDebug includeExceptionDetailInFaults="true "\/>
<\/behavior>
<\/serviceBehaviors>
<\/behaviors>
<\/font><\/p>\n
<\/system.serviceModel>
<\/configuration><\/p>\n
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9011\/RequestReplyService<\/strong>"\/>
<add baseAddress="net.tcp:\/\/localhost:9012\/RequestReplyService"\/>
<\/strong> <\/baseAddresses>
<\/host>
<endpoint<\/strong> address="http:\/\/localhost:9011\/RequestReplyService"<\/strong> binding="wsHttpBinding<\/strong>" contract="OperationLib.IRequestReplyService"\/>
<endpoint<\/strong> address="net.tcp:\/\/localhost:9012\/RequestReplyService<\/strong>" binding="netTcpBinding<\/strong>" contract="OperationLib.IRequestReplyService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexTcpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<\/service><\/p>\nExplanation:<\/h5>\n
<\/strong><\/font> <service name="OperationLib.OneWayCallService" behaviorConfiguration="OneWayCallServiceBehavior<\/font><\/strong>">
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9013\/OneWayCallService"\/>
<add baseAddress="net.tcp:\/\/localhost:9014\/OneWayCallService"\/><\/strong>
<\/baseAddresses>
<\/host><\/p>\n
<endpoint<\/strong> address="net.tcp:\/\/localhost:9014\/OneWayCallService<\/strong>" binding="netTcpBinding<\/strong>" contract="OperationLib.IOneWayCallService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexTcpBinding<\/strong>" contract="IMetadataExchange<\/strong>"\/>
<\/service><\/p>\nExplanation:<\/h5>\n
<\/strong><\/font> <service name="OperationLib.DuplexService" behaviorConfiguration="DuplexServiceBehavior<\/strong><\/font>">
<host>
<baseAddresses>
<add baseAddress="http:\/\/localhost:9015\/DuplexService"\/>
<add baseAddress="net.tcp:\/\/localhost:9016\/DuplexService"\/>
<\/strong> <\/baseAddresses>
<\/host><\/p>\n
<endpoint<\/strong> address="net.tcp:\/\/localhost:9016\/DuplexService" binding="netTcpBinding<\/strong>" contract="OperationLib.IDuplexService"\/>
<endpoint<\/strong> address="mex<\/strong>" binding="mexHttpBinding<\/strong>" contract="