How to Use web Services in ASP. Net using C#

Step 1. Run Your Service and open a new Website, Add a label and one textBox to enter radius of Circle

Click on Add web Reference

Copy the URL of Your running web Service and paste it in Your Web Reference window

Click on Go

Step 2. You can change your Web reference name but you remember this. click on add Reference

The service will be added in your application

Step 3. Now add the Web reference (name space)  in your application (shown below). written the following code in your .cs file (Default.aspx.cs).

using System;
using System.Configuration;
using System.Web;
using System.Data;
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 localhost;
public partial class _Default : System.Web.UI.Page 
{
    Service ser = new Service();
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        double area = ser.CircleArea(int.Parse(TextBox1.Text));
        Label2.Text = "Area is :  " + area.ToString();
    }
}

 Step 4. Run your application (Necessary to running your web service which you use in your application)