a simple example of wcf service.pdf

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HerewelookatanexampleofaWCFServiceinwhichwecreateaserviceforapplyingsimplecalculatorfuncons.

ASimpleExampleofWCFServicePostedbyMahakGuptainArcles|WCFwithC#onMarch22,2012

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Introduction

Here we look at an example of a WCF Service in which we create a service for applying simple

calculator functions (like add, subtract, multiply and divide).

Step 1: First we open the Visual Studio.

Click on File:-> New:-> Project.

After that, the following window will be appear.

Here we select the WCF in the Project Type and then we select the WCF Service Library in it.After that, we specify the name of this library to be Calc (which we can define in the NameSection). And then we click on the OK Button.

Step 2: When we click on the Ok Button, the Calc.cs will be opened. In the Solution Explorer, we

delete the following files, since we want to create the service from the start.

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For this we first add the namespace System.Runtime.Serialization. And then we write thefollowing code.

Code

using System.Runtime.Serialization;

namespaceCalc

{

[DataContract]

publicclassCalc

{

[DataMember] publicdoublen1;

[DataMember]

publicdoublen2;

}

}

Step 4: After that we add another class.

Here we name it ICalcService.cs.

Step 5: Now we declare as an interface not a class so we change the code like this.

Code

publicinterfaceICalcService

{

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Here we type the following operations:


{

doubleAdd(doublen1, doublen2);

doubleSubtract(doublen1, doublen2);

doubleMultiply(doublen1, doublen2);

doubleDivide(doublen1, doublen2);

}

After that, we delare it as a Service Contract, which is in a different namespace:

System.ServiceModel. Now we look at the code:

usingSystem.ServiceModel;

namespaceCalc

{

[ServiceContract]


{

[OperationContract]

doubleAdd(doublen1, doublen2);

[OperationContract]


[OperationContract]


[OperationContract]


}

}

Step 6: After that we add another class: CalcService.cs. It is an actual service implementation

class, so here we can specify the ICalcServicelike this.

Code

publicclassCalcService:ICalcService

{

}

Here we implement an interface by right-clicking and choosing the option Implement InterfaceExplicitly:

Now we add the ServiceBeahvior like this:

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]

It specifies the behavior of our service and InstanceContextMode.Single means it creates a

single instace of our service. Now we write the following code in it.


namespaceCalc

{



{

publicdoubleAdd(doublen1, doublen2)

{ returnn1 + n2;

}

publicdoubleSubtract(doublen1, doublen2)

{

returnn1 - n2;

}

publicdoubleMultiply(doublen1, doublen2)

{

returnn1 * n2;

}

publicdoubleDivide(doublen1, doublen2)

{

returnn1 / n2;

}

}

}



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right-click on the App.config file and select the Edit WCF Configuration option.

After that the following window will be appear.

After that we select the Calc.CalcService in the Configuration option:

After that we click on the Name Option:



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After that we click on EndPoints.

And then we click on Empty Name.

Here we click on Contart and again select the Calc.dll.

Step 8: Now we run the program.



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Step 9: After that we click on Add or any other function. When we click on Add the followingwindow will be appear:

Here we enter values for n1 and n2 and click on the Invoke Button. The result will appear as:

ContentsaddedbypolasatyamonNov21,2012

ArcleExtensions

Introduction

Here we look at an example of a WCF Service in which we create a service for applying simple

calculator functions (like add, subtract, multiply and divide).

Step 1: First we open the Visual Studio.

Click on File:-> New:-> Project.

After that, the following window will be appear.



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7/13

Here we select the WCF in the Project Type and then we select the WCF Service Library in it. Afterthat, we specify the name of this library to be Calc (which we can define in the Name Section). Andthen we click on the OK Button.

Step 2: When we click on the Ok Button, the Calc.cs will be opened. In the Solution Explorer, we

delete the following files, since we want to create the service from the start.

Step 3: In Calc.cs, first we create the class public and then we create it as a WCF Data Contract.For this we first add the namespace System.Runtime.Serialization. And then we write thefollowing code.

Code

using System.Runtime.Serialization;

namespaceCalc

{

[DataContract]

publicclassCalc

{

[DataMember]

publicdoublen1;

[DataMember]

publicdoublen2;

}

}

Step 4: After that we add another class.



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Here we name it ICalcService.cs.

Step 5: Now we declare as an interface not a class so we change the code like th is.

Code


{

}

Here we type the following operations:


{

doubleAdd(doublen1, doublen2);doubleSubtract(doublen1, doublen2);



}

After that, we delare it as a Service Contract, which is in a different namespace:

System.ServiceModel. Now we look at the code:


namespaceCalc

{

[ServiceContract]


{

[OperationContract]



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[OperationContract]


[OperationContract]


}

}

Step 6: After that we add another class: CalcService.cs. It is an actual service implementation

class, so here we can specify the ICalcServicelike this.

Code


{

}

Here we implement an interface by right-clicking and choosing the option Implement InterfaceExplicitly:

Now we add the ServiceBeahvior like this:


It specifies the behavior of our service and InstanceContextMode.Single means it creates a

single instace of our service. Now we write the following code in it.


namespaceCalc

{



{

publicdoubleAdd(doublen1, doublen2)

{

returnn1 + n2;

}

publicdoubleSubtract(doublen1, doublen2)

{returnn1 - n2;

}

publicdoubleMultiply(doublen1, doublen2)

{

returnn1 * n2;

}

publicdoubleDivide(doublen1, doublen2)

{

returnn1 / n2;

}

}

}

Step 7: Now we try to run the program; it can not be run since it is not yet completed. Nowright-click on the App.config file and select the Edit WCF Configuration option.



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After that we select the Calc.CalcService in the Configuration option:

After that we click on the Name Option:

After that we click on EndPoints.



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And then we click on Empty Name.

Here we click on Contart and again select the Calc.dll.

Step 8: Now we run the program.

Step 9: After that we click on Add or any other function. When we click on Add the followingwindow will be appear:



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Here we enter values for n1 and n2 and click on the Invoke Button. The result will appear as:

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COMMENTS 9of9

Mar25,20120Like 0Reply PostReply

SteveBlodge

Thanksforthegreatarcle!

Dec21,20120Like 0Reply PostReply

ShaijuJanardhanan

ThankU

Mar26,20130Like 0Reply PostReply

VinodKumarChennegowda

Greatexplanaons

Jul26,20130Like 0Reply PostReply

ChandanSinhaVerygoodworkingexampleofWCF.GreatWork!Thanks.

Aug06,20130Like 0Reply PostReply

KailashChandraBehera

NiceArcle

Nov21,20130Like 0Reply PostReply

SantoshKumar

Veryeasyandnicedescripon.

Nov26,20130Like 0Reply PostReply

MahakGupta

Thanks

DarlingDoll

WithVS2013neramework4.5,anerror:AddSyncisnotsupportedintheWCFtestclientbecauseitusestype



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13 comments

Sudhir Patil Software Engineerat PALASH Healthcare Systems Pvt. LtdReally Good Article......Helpful for beginners .....Nice and Very Useful....

Reply Like May 17 at 3:14am

Alo k Shar ma Software Engineerat Capgemini India

ty very much .. good illustration

Reply Like January 10 at 2:57am

Mohan Gopi Software Engineerat HireCraft Software Pvt Ltd

simple and understandable, very usefull.

Reply Like October 8, 2013 at 12:13am

vivek_g86(signed in using yahoo)

Very simple and useful. Thanks a lot.

Reply LikeAugust 8, 2013 at 12:34pm

Num Krub Programmerat Prosoft 178 followers

Recommend for everybody, this is a great article.

Reply Like January 14, 2013 at 12:54am2

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