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  XmlDocument xmldoc = new XmlDocument();//´´½¨xmlÎĵµ¶ÔÏó
        XmlNode root;//¸ù½Úµã
        xmldoc.Load(Server.MapPath("address.xml"));//¼ÓÔØxmlÎĵµ
        root = xmldoc.DocumentElement;//»ñÈ¡¸ù½Úµã
        XmlElement student = xmldoc.CreateElement("student");//´´½¨ÔªËØ
        XmlElement node1 = xmldoc.CreateElement("stuName");
        node1.InnerText = stuName.Text.Trim();//¸øÔªËØÄÚÎı¾¸³Öµ
        XmlElement node2 = xmldoc.CreateElement("phone");
        node2.InnerText = phone.Text.Trim();
        XmlElement node3 = xmldoc.CreateElement("qq");
        node3.InnerText = qq.Text.Trim();
        XmlElement node4 = xmldoc.CreateElement("email");
        node4.InnerText = email.Text.Trim();
        XmlElement node5 = xmldoc.CreateElement("home");
        node5.InnerText = home.Text.Trim();
        XmlElement node6 = xmldoc.CreateElement("headImage");
        node6.InnerText = headImage.Text.Trim();
        XmlElement node7 = xmldoc.CreateElement("work");
        node7.InnerText = work.Text.Trim();
        student.AppendChild(node1);//½«Ö¸¶¨½ÚµãÌí¼Óµ½¸Ã½Úµã×Ó½ÚµãÁбíµÄĩβ
        student.AppendChild(node2);
        student.AppendChild(node3);
        student.AppendChild(node4);