Web Service in C# - c# - c# tutorial - c# net



What is Web Service in C#?

  • Web Service in C# is cross-platform and it is a service which is written in one language and it can be invoked by an application
  • Web Service is built on XML-based standards for exchanging data.
  • Web Service is limited to the set of data types recognized by the XML Schema standard
  • Web Service is limited to the set of data types recognized by the XML Schema standard
  • Hence Web Service is not limited to the .NET Framework in C#
  • The only way to access Web Service is an internet connection to make the HTTP request

Create a web service

  • This topic is tell us as per how to create a web service
  • Hence we create a web service which will return the sum of two integers

Steps to create a web Service

Step 1:

Open Visual Studio in Administrator mode

Step 2:

To create a new project, click File → New → Project and select .Net Framework 3.5 (on the top)

Step 3:

Select ASP.NET web service application and name the project (which can be named as MyWebServiceDemo) and click the OK button.

 create web service in webservices in c#

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Step 4:

Visual Studio will create a web service (Service1.asmx and Service1.asmx.cs) for the project which is given.

Step 5:

The web service that will return two integers has been created successfully in the Visual Studio for C#

Implementing a web service

  • After creating the web services, we need to implement the web services
  • In order to implement the web service, rename "Service1" file to "MyService" and after renaming the web service, change the class name from Service1 to MyService
  • Then open the mark up (asmx) page
  • Thus, change the "CodeBehind" property from "Service1.asmx.cs" to "MyService.asnx.cs" as we rename the file

MyService.asmx

<%@ WebService Language="C#" CodeBehind="MyService.asmx.cs"  
Class="MyWebServiceDemo.MyService"%> 
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MyService.asmx.cs

using System.Web.Script.Serialization;  
using System.Web.Services;  
  namespace MyWebServiceDemo  
{     
    [WebService(Namespace = "https://www.wikitechy.com/")]      
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]  
    [System.ComponentModel.ToolboxItem(false)]  
    [System.Web.Script.Services.ScriptService]  
    public class MyService : WebService  
    {  
        [WebMethod]  
        public int SumOfNums(int First, int Second)  
        {  
            return First + Second;  
        }  
        
        
    }  
} 
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  • The service has been implemented successfully

Test a web service

  • After implementing the web service, the next step is to compile and test the web service
  • The "http://localhost:56655/MyService.asmx" page will open which has a link for the Service description (the WSDL document, documentation for web service)
  • We can use method overloading of the OOP concept.
  • Add the following WebMethod in MyService class.
[WebMethod]  
public float SumOfNums(float First, float Second)  
{  
      return First + Second;  
} 
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 test web service in web services in c#

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  • Here is a program which demonstrate the test of Web Service

Program:

using System.Web.Script.Serialization;  
using System.Web.Services;  
  namespace MyWebServiceDemo  
{  
    [WebService(Namespace = "https://www.wikitechy.com/")]  
    [WebServiceBinding(ConformsTo = WsiProfiles.None)]  
    [System.ComponentModel.ToolboxItem(false)]  
    [System.Web.Script.Services.ScriptService]  
    public class MyService : WebService  
    {  
        [WebMethod]  
        public int SumOfNums(int First, int Second)  
        {  
            return First + Second;  
        }  
        [WebMethod(MessageName = "SumOfFloats")]  
        public float SumOfNums(float First, float Second)  
        {  
            return First + Second;  
        }  
    } 
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