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.

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:

img777.gif

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

web service article

Repeat the same for calling "show" method.

web service article