服务器控件和 viewstate

        //不会产生处理回发事件的方法。类似客户端html
        Repeater rep = new Repeater();
        DataList dtl = new DataList();
        FileUpload fil = new FileUpload();
        HyperLink hy = new HyperLink();
        AdRotator adr = new AdRotator();
        Image ima = new Image();
        Label fdfk = new Label();

        //控件的状态通过IPostBackDataHandler接口处理，是ViewState的机制，生成类似如下的代码：
         input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" 
         value="/wEPDwUKMjA0OTM4MTAwNGRk5nKoxvYg5xYYaGq0l2c6t+p8p3plHndJQyYKYhyg6Hs=" />
          TextBox b= new TextBox();
        CheckBox bn = new CheckBox();
        CheckBoxList bnt = new CheckBoxList();
        RadioButton re = new RadioButton();
        RadioButtonList ret = new RadioButtonList();
        DropDownList dddf = new DropDownList();
        HiddenField hidd = new HiddenField();
        ImageButton midd = new ImageButton();//yyy

        //服务器控件为处理回发事件而产生的方法。继承自：IPostBackEventHandler，禁用viewstat后，生成类似如下的代码：

　　　　 <input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="/wEWAgKHsdXGBQKM54r
　　　　 GBjcxpNvbuY4N8yL9GzYUAYi6wv0NlR9iXO6jWPenADy8" />

         GridView gr = new GridView();
        Button ddd = new Button();
        Calendar cal = new Calendar();
        BulletedList bull = new BulletedList();
        ImageButton midddr = new ImageButton();   //yyy
        LinkButton lindd = new LinkButton();
        Table tabb = new Table();