how to use webservices in asp.net c#

What you really need to know first is how to use google. It is your friend and returns about 13,000,000 results when searching your exact subject. how to use webservices in asp.net C#[^]

A very simple example is here on this link hope it will help if helped mark it as answer
http://www.aspdotnet-suresh.com/2011/05/aspnet-web-service-or-creating-and.html[^]

right click on your solution => add => new Item => web service, and then form your solution make a new project, build project, opern your webservice in browser , right click on another refrence folder => add web refrence => discover=> ok!

now if you using namespace of your service , you can use the methods in them!

this is a web service for check the username!

using System.Linq;
using System.Web;
using System.Web.Services;

namespace AspNetAjax_Examples
{
    /// <summary>
    /// Summary description for HelperWebService
    /// </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 HelperWebService : System.Web.Services.WebService
    {

        [WebMethod]
        public bool CheckUsername(string Username)
        {
            System.Threading.Thread.Sleep(3000);
            string url = HttpContext.Current.Request.UrlReferrer.ToString();

            var Context = new AdvancedASP_8_ExamplesEntities();
            return (from u in Context.Users
                    where u.Username.ToLower() == Username.ToLower()
                    select u).Any();
        }
    }
}

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Hi, Please loon on this wonderful link for understanding Web Service with Code.

http://www.aspdotnet-suresh.com/2011/05/aspnet-web-service-or-creating-and.html?showComment=1374226382630#c2894022007779895943[^]

right click on your solution => add => new Item => web service, and then form your solution make a new project, build project, opern your webservice in browser , right click on another refrence folder => add web refrence => discover=> ok!