控制界面是否可输入的一个例子

         private   void  EnableForm( bool  isReadOnly)
         {
            bool isEndble = !isReadOnly;
            Control ctl = txtProposer.Parent;
            foreach(Control sonctl in ctl.Controls)
            {
                if (sonctl is TextBox)
                {
                    ((TextBox)sonctl).Attributes["readOnly"] = isReadOnly.ToString();
                }

                if (sonctl is HtmlInputText)
                {
                    ((HtmlInputText)sonctl).Attributes["readOnly"] = isReadOnly.ToString();
                }

                if (sonctl is RadioButtonList)
                {
                    ((RadioButtonList)sonctl).Enabled = isEndble;
                }

                if (sonctl is DropDownList)
                {
                    ((DropDownList)sonctl).Enabled = isEndble;
                }
            }
        }