Creating a basic REST Service

Good morning everyone I am Dhanja Kumar and I am MbP on Connected System

In this learning video I am going to show you how we can create a basic race service

To create a basic service just go ahead and open a Visual Studio and create a new project

From the WCF tab select WCF service application project template in Visual Studio 210

And if you are using Visual Studio 2008 you will be getting this WCF service application project template inside the

the web tab so just go ahead and create a WCF service application you can see that

WCF has created some default code for you go ahead and delete all those default

code which got created by WCF because you really don't need that from the service implementation class and as well as from your contract also we

don't need any data contact because purpose of our video is to show you how we can

create a very basic service now what all you need to do is that I have a string

gate data it would be taking it would be taking integer value as you know in

rest service we cannot pass input parameters on any type other than a stream so

what I'm going to do is that I'm going to modify it as a string fine it will be returning or string to us now we need to construct this using

we have get fine let me increase the size of the font for you so that will have a

better view of that so what I'm going to do actually in this video is that I

be creating two operation contract in one operation contract or in one method

I'll be constructing the URI for you and other in other method we won't be constructing in URI so the method where we are not

constructing the URI we will be of accessing that particular method through

race service using their function name using their method name and on the other

method we are constructing the URI will be accessing that a method with the URI

which we are constructing so just go ahead and make it 60 for you

Fine. Now I'm giving gate data using method name, something like that

Fair enough. And the other method which I going to create as all we know that in RAS service everything is a made everything is a resource with a unique name unique URI and that unique name is called unique is called URI of that particular method and let us say get data is using URI just say URI and it will be taking a string 2 and value

Fine and here you change this to only method. Sure enough here I'll be constructing the URI. So URI will be URI template equal to, let us say, get data

And then since we have one of parameter in this, if you see string value, we need to give exact same name here as the second

the second path of our URI and make so since this is a parameter it should be in the Calibrillus

Fine. So we have constructed the URI. So we are going to access this get data using URI with the URI base address slash get data and slash the value

On the other hand, this particular method we have not constructed, so I'm going to access it using the method name and question mark and I'll be

passing value input parameter as value equal to the value what we want to pass

Now go ahead and implement this. Implement this method in our service class and here you are just make it as a public

just give the default codes and here you can return this is a method in right

return value on I am returned by method

Here, enough. Go ahead and implement the other method which we have, this one, and make it as again public, and say

value plus IMTUR and returned by UR&M

Now since all we know that to implement WCF service, binding available to us is web HTTP binding

So there are three ways you can create a service. The first way is that you can configure the end point here in your web

The other way is that you can configure the waypoint in a host in a console application and host your service in a service in a console app I be showing you that demo in further videos and the third point is the third way is that you can rely on the factory classes which

comes uh with wcf so what all you need to do is that if you're using uh visual studio 210

just go ahead and comment service hosting environment rely and if you're using visual studio

2008 then go ahead and comment all the endpoint configuration make sure that your your your met

data is not get enabled because this does not support the metadata so here I have

commented this click on your service file and open view markup frame up and here you have something called factory sorry factory

equal to system dot service model dot activation dot web service

host factory shame up system. system. . is a class which comes

with WCAF which allows you to create a service. If you want to see this class

just go ahead. In your class here you have system. service model. wave you can see this class here

system dot service model dot activation dot web service host factory web service hostwactor right

we are just using this class over there. fine now up to this point we have created our service we have we have created our contract

here we have created our contract and in the contract one method we are

constructing the uri in the for this particular method and for the other we are not

constructing the uri so we are going to access this method using the method name itself

then we have implemented this this to control these two method over here

then we configured the endpoint for a service using the factory classes web service for

factory class which comes as a part of WCF. Now go ahead and run your service

I don need to run it in the website I don need I don want to run it in WCF test plan I want to run it in the browser So for that what I need to do is that just run it again Oh sorry Let give me a moment

What resource explore right click on your service file and click in view in browser

Here you see that endpoint not found. So now if you go to your

methods you can see you have a base address that get data slash

value so you can access this gate data using UR are using base address

slash gate data slash value so what how you can access is that just open the

notepad I'll show you format format let us take it 28 and now if you see our base address is dot sbc up to here right

Just go ahead, this is your base address. Now, to access that, this you have given get data slash value, right

So go here, get data slash any value which you want. Let us say I'm giving value, Dhanenka

So Dhanja is the input parameter input for the string value. Now go ahead and copy paste this in your browser

You can see that we are getting Dhanenja, I am returned from your URL

am returned from uri name here we are using the this method to call get data slash

dhranjay and here the gate data slash value which we constructed the uri but other other

method get data using method we have not constructed the uri for this so we'll be accessing this

using the method name itself so for so for that what we need to do is that we this is our base

address right Then the metter name, exact method name you need to give here

The method name is get data using method. Question mark, the exact parameter name you have to give here

Value and then something let us say, Dhanja. Now go ahead, copy it in your browser

And you can see Dhanja I am returned by the method name. What I'm going to do is that if you change this value to value one

not the exact parameter name which you have given in the method, you can see you are not getting the value which you are passing as into parameter

So we need to make sure that the parameter name and the name you are calling through the URL must be the same

So here we are done. In this video, I have seen you that how we can create a basic restoration can access them using the method names or using the URL name

Thank you so much. Looking forward to meet you again. Thank you