Calling a web service into another web service application

Alok Pandey
13y
223.8k
1
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Article

Introduction:

Generally we consume web services in web application, but there may be a need to call a web service in another web service application. As we know, a web application can consume more than one web service (here). In this article I am describing a simple way of calling a web service application in another web service application. A web service application can also call another web service. Here I will create two simple web services and will call one from another.

At first we create a web service application. Follow the given steps.

Go to Visual Studio 2010 and create a New Project
Select an ASP.NET Web Service Application
Give it a name and click ok button

Replace the code by the code given below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace firstservice
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {
        [WebMethod]
        public string show()
        {
            return "Method from first web service";
        }
    }
}

Run this service application. Now create another ASP.NET Web Service Application (As above) and follow the given steps.

Go to Solution Explorer and right click at your project.

calling web service into another web service

Select Add Service Reference. A new window will be open.

calling web service into another web service

Click at "Advance" button ( Given in Above figure.). A new window will open.

calling web service into another web service

Click at "Add Web Reference" button.

calling web service into another web service

Copy the URL of first (Which has created at first) web service and paste it at the URL. Look at below screen - shot.

web service article

Click the Go button.

web service article

You can set Web reference name. the default name is "localhost". Click Add reference.

Now a web reference has added into your web service application. Now replace the code with the following code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace secondwebservice
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {

        [WebMethod(Description="Method of running web service")]
        public string show()
        {
            return "Method from second web service";
        }
        [WebMethod(Description="Method of called web service")]
        public string display()
        {
            localhost.Service1 obj = new localhost.Service1();
            return obj.show();
        }
    }
}

Run the service.

Output:

Click at display ( method ) to go to test page and click the "invoke" button.

Repeat the same for calling "show" method.

web service article