LoginInfo loginInfo = new LoginInfo();
xmlNode = _xml.SelectSingleNode(loginUrl);
loginInfo.LoginUrl = xmlNode.InnerText;
xmlNode = _xml.SelectSingleNode(loginUser);
loginInfo.UserId = xmlNode.Attributes["tagId"].Value;
loginInfo.UserValue = xmlNode.InnerText;
xmlNode = _xml.SelectSingleNode(loginPwd);
loginInfo.PwdId = xmlNode.Attributes["tagId"].Value;
loginInfo.PwdValue = xmlNode.InnerText;
xmlNode = _xml.SelectSingleNode(loginBtnId);
loginInfo.BtnId = xmlNode.InnerText;
XML:
<login>
<url>https://www.jb51.net/JLxxxxn/Lxxxxx.aspx</url>
<user tagId="txtAccount">xxxx</user>
<pwd tagId="txtPassword">xxxxx</pwd>
<btnId>btnLogin</btnId>
</login>
取节点中间的值使用xmlNode.InnerText，即使用InnerText属性。如<btnId>btnLogin</btnId>
取属性的值可以使用xmlNode.Attributes["tagId"].Value，即使用属性的Value属性，如<user tagId="txtAccount">xxxx</user> 的tagId属
