若将此功能做成函数放在app_code中，直接用“FindControl”查找表单元素则可能会提示错误： 当前上下文中不存在名称“FindControl”。可参考如下的方法重置表单内元素：

        public static void ClearForm()
        {
            Control frm = (HttpContext.Current.Handler as Page).FindControl("Form1");
            if (frm != null)
            {
                foreach (Control ctrl in frm.Controls)
                {
                    if (ctrl is TextBox)
                    {
                        ((TextBox)ctrl).Text = "";
                    }
                }
            }

        }