基於Ajax的日曆控件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI;
using System.Collections.Specialized;
using AjaxControlToolkit;
 
/// <summary>
/// 日曆Box
/// </summary>
///
namespace EBIZ.WebControls
{
    public class TextBoxCalendar : CompositeControl
    {
        protected CalendarExtender calendar;
        protected TextBox txt;

        public event EventHandler TextChanged;

        /// <summary>
        /// 日期值
        /// </summary>
        public string Text
        {
            set
            {
                EnsureChildControls();
                txt.Text = value;
            }
            get
            {
                EnsureChildControls();
                return txt.Text;
            }
        }

        /// <summary>
        /// css
        /// </summary>
        public string CssClass
        {
            set
            {
                EnsureChildControls();
                txt.CssClass = value;
            }
        }
        
        protected override void CreateChildControls()
        {
            Controls.Clear();

            txt = new TextBox(); 
            txt.TextChanged += new EventHandler(OnTextChanged);
            txt.ID = "txt";
            txt.Width = Unit.Pixel(80);
            txt.Attributes["readOnly"] = "readOnly";

            calendar = new CalendarExtender();
            calendar.TargetControlID = txt.ID;
            calendar.Format = "yyyy/MM/dd";
            calendar.ID = "cld";
           
            Controls.Add(txt);
            Controls.Add(calendar);
        }

        protected virtual void OnTextChanged(object sender, EventArgs e)
        {
            if (TextChanged != null)
                TextChanged(this, e);
        }
    }
}