.NET (Core and Framework)

<script type="text/javascript">function BindEvents() {
  $(document).ready(function () {
    $("#<%=txtID.ClientID%>")+$("#<%=txtName.ClientID%>").autocomplete('../../Common_Search/Employee.ashx');
  });
}

</script>

<script type="text/javascript">
function BindEvents() {
  $(document).ready(function () {
    $("#<%=txtID.ClientID%>").autocomplete('../../Common_Search/Employee.ashx');
  });
}
</script>

static public string ValidateCredentials(string userName, string password)
        {
            string result = null;
            try
            {
                log4net.ILog log = log4net.LogManager.GetLogger("Login.Aspx");
                DateTime time0 = DateTime.Now;
                PrincipalContext principalContext = new PrincipalContext(ContextType.Domain, StsDomainName, StsAdRootOu + "," + StsDomainDn , ContextOptions.SimpleBind,StsAdUserName, StsAdUserPswd);
                
                
                if (principalContext.ValidateCredentials(StsDomainShrotName +"\\" + userName, password,ContextOptions.SimpleBind))
                    result = "1";
                else
                    result = "0";
                log.Debug("Time cost：" + (DateTime.Now - time0).TotalMilliseconds + "DC：" + principalContext.ConnectedServer);
                //principalContext.Dispose();
            }
            catch (Exception e)
            {
                result = e.Message;
            }
            
            return result;