//用委托的方法实现

//控件代码

        public delegate void DelegateFunction( string sPageTitle );

        private DelegateFunction delegateChangePageTitle = null;

        public DelegateFunction ChangePT

        {

            get { return delegateChangePageTitle; }set { delegateChangePageTitle = value; }

        }

        protected void BtEdit_Click( object sender, EventArgs e )

        {

            if ( delegateChangePageTitle != null ) delegateChangePageTitle( "Edit" );

        }

        protected void BtAdd_Click( object sender, EventArgs e )

        {

            if ( delegateChangePageTitle != null ) delegateChangePageTitle( "Add" );

        }

//页面    后台代码

        protected void Page_Load( object sender, EventArgs e )

        {            myWebControl11.ChangePT = ChangePT;        }

        void ChangePT( string sTmp )

        {            this.Page.Title = sTmp;        }

//页面    前代码

<%@ Register src="myWebControl.ascx" tagname="myWebControl1" tagprefix="uc1" %>

<uc1:myWebControl1 ID="myWebControl11" runat="server" />

//用事件的方法实现  控件定义事件    页面实现

//控件代码

//定义一个不含数据的事件处理方法

        public event EventHandler ClickModifyTitle;

        protected void btCreateValue_Click( object sender, EventArgs e )

        {            ClickModifyTitle( this, EventArgs.Empty );         }

//页面后台代码

        protected void Page_Load( object sender, EventArgs e )

        {

            myWebControl11.ClickModifyTitle +=new EventHandler(myWebControl11_ClickModifyTitle);

        }

        void myWebControl11_ClickModifyTitle( object sender, EventArgs e )

        {

            this.Page.Title += new Random().Next( ,  ).ToString();

        }