验证文本框服务器控件的日期

我正在尝试创建一个自定义服务器控件,它只是一个带有Ajax ASP.NET MaskedEditexter的文本框,用于在控件失去焦点时使其有效,以确保输入了正确的日期。

这是目前为止我所拥有的全部,我能够构建控件,但是没有进行任何验证,我在这里做的是什么错误。

namespace One_Eva_Control_Library
{

    [ToolboxData("<{0}:Valid_Date_Textbox runat=server></{0}:Valid_Date_Textbox>")]
    public class Valid_Date_Textbox : System.Web.UI.WebControls.TextBox
    {

    #region Methods
        /// <summary>
        /// Creates Validator
        /// </summary>
        /// <param name="e">Init eventArg</param>
        protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);

            MaskedEditExtender meDateValidator = new MaskedEditExtender();

            meDateValidator.ID = "dateExtender";
            meDateValidator.Mask = "99/99/9999";
            meDateValidator.MessageValidatorTip = true;
            meDateValidator.MaskType = MaskedEditType.Date;
            meDateValidator.UserDateFormat = MaskedEditUserDateFormat.DayMonthYear;
            meDateValidator.CultureName = "en-GB";


            MaskedEditValidator meEditValidtor = new MaskedEditValidator();

            meEditValidtor.ControlExtender = meDateValidator.ID;
            meEditValidtor.ControlToValidate = base.ID;
            meEditValidtor.InvalidValueMessage = "Invalid Date";
            meEditValidtor.Display = ValidatorDisplay.Dynamic;
            meEditValidtor.TooltipMessage = "Input date in 99/99/9999 format";
            meEditValidtor.InvalidValueMessage = "*";
            meEditValidtor.ValidationGroup = "MKE";


        }




    #endregion
    }