How to call web service in asp.net with sample code?

Call webservice in asp.net is completely given here. In this demo tutorial you can see that when you press button that time will be written by web service. Here i am giving complete demo source code with example code snippets here.

webservice.asmx

using System;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
/// <summary>
/// Summary description for WebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 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 WebService : System.Web.Services.WebService {
    public WebService () {
        //Uncomment the following line if using designed components
        //InitializeComponent();
    }
    [WebMethod]
    public string datetimeresult() {
        return System.DateTime.Today.ToString();
    }
   
}

default.aspx.cs file

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;
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        WebService wb = new WebService();
        Label1.Text = wb.datetimeresult();
    }
}

output Screen

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