Question

I have created a C# ASP.NET web page(Front End) to collect information from user and I would like to know how to send the information to a java web services to process the information which is from the web page?

Answer 1

This post How to invoke Java web service in ASP.net using C# will give you some direction. Essentially, you need to:

1. Create a Java Web Service
   • Create a web application project
   • Add web service to the project
   • Add operations to the web service
   • Implement the web methods
   • Deploy and test the web service
2. Create ASP.net Web Site Using C#
   • Create ASP.net web site
   • Add a web reference
   • Write code to invoke web service
   • Test web service client application

The tutorial above by Bikash Shaw aims develop simple mathematical functions like addition, subtraction etc. using Java web services called JSimpCalcWebService:

package calc.ws;

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebService;
import calc.util.NumberFormater;

/**
* @author Bikash Shaw
*/
@WebService()
public class JSimpCalcWebService {

/**
  * Web service operation
  */
  @WebMethod(operationName = "addition")
  public String addition(@WebParam(name = "parameter1")
  double parameter1, @WebParam(name = "parameter2")
  double parameter2) {
 //TODO write your implementation code here:
      return NumberFormater.format((parameter1 + parameter2),0,6);
 }

}

Example C# code to invoke the web service:

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using JSimpCalcWebServiceService;

public partial class _Default : System.Web.UI.Page 
{
    JSimpCalcWebServiceService.JSimpCalcWebServiceService proxy;

    protected void Page_Load(object sender, EventArgs e)
    {
        proxy = new JSimpCalcWebServiceService.JSimpCalcWebServiceService();
    }

   protected void btnAddition_Click(object sender, EventArgs e)
   {
       try
       {
           lblResultAddition.Text = "Result: " +    proxy.addition(double.Parse(txtbtnAdditionParameter1.Text), 
                                double.Parse(txtbtnAdditionParameter2.Text));
       }
       catch (FormatException)
       {
           lblResultAddition.Text = "Result: Invalide Input";
       }
       UpdatePanelAddition.Update();
   }
 // Add more methods here...
 }