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我想創建一個自定義服務器控件，它只是一個帶有AJAX asp.net MASKEDEDITEXTENDER的文本框，以便在失去焦點時確保控件有效，從而確保輸入了正確的日期。日期驗證文本框服務器控件
這是我迄今爲止所有的，我能夠建立控制，但沒有驗證正在發生我在這裏做錯了什麼。
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
}