I am facing an issue selecting first item from the webdropdown after the page loads. If I select any other items then I am able to select the first item. Please see below code

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
    <script type="text/javascript">
       function getItems(id) {
           var wdd = $find(id);

           if (wdd.get_items().get_length() == 0) {
               wdd.loadItems();
           }
       }

       function onFocus() {
           getItems("<%= wddFocus.ClientID %>");
       }

       function test() {
           getItems("<%= wddFocus.ClientID %>");
       }
    </script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <h2>
        Welcome to ASP.NET!
    </h2>
    <p>
        To learn more about ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>.
    </p>
    <p>
        You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&amp;clcid=0x409"
            title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>.
    </p>
    <div>
   <ig:WebDropDown ID="wddFocus" runat="server"
        onitemsrequested="wddFocus_ItemsRequested" Width="200px"
        TextField="FirstName" ValueField="Id">
        <ClientEvents Focus="onFocus" />
        <DropDownItemBinding TextField="FirstName" ValueField="Id" />
        </ig:WebDropDown>

    </div>
  </asp:Content>

from .cs file:-

public partial class _Default : System.Web.UI.Page
{
    private IList<Person> _people = new List<Person>();

    protected void Page_Load(object sender, EventArgs e)
    {
        _people.Add(new Person { FirstName = "Craig" });
        _people.Add(new Person { FirstName = "Scott" });
        _people.Add(new Person { FirstName = "Kevin" });
        _people.Add(new Person { FirstName = "Jack" });
    }

    protected void wddFocus_ItemsRequested(object sender, DropDownItemsRequestedEventArgs e)
    {
        this.wddFocus.DataSource = this._people;
        this.wddFocus.DataBind();


      
            }

}

What I am doing wrong here.