einaros

namespace CurrentUserService
{
    using System.Web.Script.Services;
    using System.Web.Services;
    using Microsoft.SharePoint;

    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ScriptService]
    public class CurrentUserService : WebService
    {
        [WebMethod]
        public string GetCurrentUser(string webUrl)
        {
            using (var site = new SPSite(webUrl))
            {
                using (SPWeb web = site.OpenWeb())
                {
                    return web.CurrentUser.LoginName;
                }
            }
        }
    }
}