WCF Service:
Windows Communication Foundation (WCF)
is not a language, it’s not a technology and it is a framework for building
service-oriented applications. So, if you want any service-oriented application
you go with wcf services.
Here also you can send data and
receive data from one point to another point. Are created multiple end point,
and you host wcf service in multiple places like IIS, local, console
application, windows services.
The Main Advantage of using wcf
supports more protocols like HTTP, TCP (Transmissions Control Protocol).
Wcf combative web application that
instead of only one HTTP protocol for example if the customer is required the
same service for web application as well as windows applications, for web
application we can use HTTP protocol and for windows application we can use TCP
protocol so, then we go for wcf service.
We will get the data XML format and SOAP body (Simple object access Protocol) in
wcf service also.
SOAP is a method of transferring messages, or small amounts of information, over the Internet. SOAP messages are formatted in XML and are typically sent using HTTP (hypertext transfer protocol).
The disadvantage of some more
complicated in configure wcf service apart from that everything is good when we
deal with wcf service.
We create wcf project will have 2
files,
1.
create
interface
2.
create
a class
what are the interface are there
that called as a contract. that particular contract class need to implemented.
- That means when you implement the wcf service the contract going to register between client and server.
- If you said that particular contract this method is there, if you have to be include that method. In case that method not included it’s get error. This is a stick policy of contract.
- In here each and every web service weather accessing in Http weather accessing in Tcp they should be provide address. If don’t provide address the default which application are you working that address taken for us.
- To communication with your web services either we communicated by using Ajax call either by using class object it can create and access the services
- Here wcf service we can create services two ways
1.
Restful
service
2.
Service-oriented
service
- Wcf services also use for creating restful services
- Restful service means each and every is versa access by using URI. So, that type of restful service we can even creating by using wcf.
- Even test wcf service also there is lot of ways Svcutill.exe, postman, fiddler.
- Wcf service we have been using in windows application. Consuming encoded binary format (like 1 and 0’s)
- Tcp protocol only converted encoded binary format.
Create
WCF Service:
Right click on Solution Explore
->Add -> New Project -> ASP.NET Web Application (.NET Freamework)
using C# -> Next -> Project Name (WcfApplication) -> Create ->
select Empty and select MVC folder -> Create button like below
Right Click on Project -> Add
-> New Item -> WCF Service -> Add
Project added like below
Open IMyService1.cs file copy the
below code in interface method
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Runtime.Serialization;
using
System.ServiceModel;
using
System.Text;
namespace
WcfApplication
{
// NOTE: You can use the
"Rename" command on the "Refactor" menu to change the
interface name "IMyService1" in both code and config file together.
[ServiceContract]
public interface IMyService1
{
[OperationContract]
void
DoWork();
[OpertaionContract]
int Add(int a, int b);
}
}
Open MyService1.svc.cs file copy the
below code
using
System;
using System.Collections.Generic;
using
System.Linq;
using
System.Runtime.Serialization;
using
System.ServiceModel;
using
System.Text;
namespace
WcfApplication
{
// NOTE: You can use the
"Rename" command on the "Refactor" menu to change the class
name "MyService1" in code, svc and config file together.
// NOTE: In order to launch
WCF Test Client for testing this service, please select MyService1.svc or
MyService1.svc.cs at the Solution Explorer and start debugging.
public class MyService1 :
IMyService1
{
public void
DoWork()
{
}
public int Add(int a, int b)
{
return a + b;
}
}
}
Run the Application (Right Click on
MyService1.svc file -> click view in Browser option)
Test the
wcf service:
Go to Run window type WcfTestClient.exe incase it not open go
through the below paths copy that path in run Command prompt
VS 2019 Community:
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\WcfTestClient.exe
VS 2017 Community:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\WcfTestClient.exe
The window open like below
In above window click on file ->
Add service then window will be open then give path like below
When u click ok button, it will show
like below
Click the Add method in lift side.
In
the Request box, select
the Value field and
type
numbers
.
Click
the Invoke button. If a Security Warning dialog box
appears, click OK. The result
displays in the Response box.
Bindings in wcf services:
Basic binding:
This binding is provided by the BasicHttpBinding class. It
is designed to expose a WCF service as an ASMX web service, so that old clients
(that are still using an ASMX web service) can consume the new service. By
default, it uses the HTTP protocol for transport and encodes the message in
UTF-8 text format. You can also use HTTPS with this binding.
This
binding is provided by the WebHttpBinding class. It is designed to expose WCF
services as HTTP requests using HTTP-GET and HTTP-POST. It is used with
REST based services that may provide output in XML or JSON format. This is
very much used with social networks for implementing a syndication feed.
TCP binding:
This binding is provided by the NetTcpBinding class. It uses TCP protocol for communication between two machines within intranet (means same network). It encodes the message in binary format. This is a faster and more reliable binding compared to the HTTP protocol bindings. It is only used when the communication is WCF-to-WCF which means both client and service should have WCF.
