What are the steps to create a webservice and consume it
What are the steps to create a webservice and consume it ?
Note :- For this question this book will make a attempt by creating a simple webservice and
explaining steps to acheive it. A simple webservice will be created which takes two number
and gives addition result of the two number. In CD sample webservice project with folder
name MathsWebService is provided and same will be explained below. Definitely the
interviewer will not expect such a detail answer but this book will explain you in detail so
that you are on right track during interview.
This webservice will add two numbers and give to the calling client.All the below steps are according to VS2005 beta editor :-
ã First create a website by clicking on File -- New WebSite.
ã From gVisual Studio Installed Templatesh click on gAsp.NET Web Serviceh. See figure below. Name the figure as gMaths Web Serviceh.
By default the .NET editor has made a default webservice method called as "HelloWord" which returns a string datatype. Let's rename "Service.vb" to "Maths.vb" and "Service.asmx" to "Maths.asmx". Lets replace the HelloWorld with following code below :-
Public Function AddTwoNumbers(ByVal Number1 As Integer, ByVal
Number2 As Integer) As Integer
Return Number1 + Number2
After the webservice is done click on add Webreference. Normally for components we do a Add Reference and for Webservices we do Add Web Reference.
You will be shown with a list of webservices which are known to the solutions. As we are looking for our Maths webservice which exist in the
same solution, we click Webservices in this solution.
ã Your editor has located the gMathsh webservice.Select the webservice.
After you have clicked on Maths webservice you will see a search progress bar as shown in figure below. This process will start the webservice, reference it and create a proxy for the client, so that using it client can absorb the webservice.
Finally you are able to see your webservice which is ready for use. Click on Add Reference and you will see a Localhost reference in your .NET solution.
We need to make a client who will absorb this Maths Webservice. Add WebserviceClient.aspx and create a UI as shown below. In the button click put in the following code. LocalHost.ClsMaths is the proxy object by which you can make calls to the webservice.
Sub cmdCalculate_Click(ByVal sender As Object, ByVal e As System.EventArgs) Dim pobjMaths As New localhost.ClsMaths lblResultDisplay.Text = Convert.ToString(pobjMaths.AddTwoNumbers(Convert.ToInt16(txtNumber1.Text), Convert.ToInt16(txtNumber2.Text))) End Sub
2007-10-23, 4548👍, 0💬
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