XmlNode node=root.SelectSingleNode("//@id='xx'");
NewsML/NewsItem/Identification/Label/LabelTypeæ¯èç¹
FormalNameæ¯å±æ§
labeltypeæ¯ä½ çå¼
doc.SelectSingleNode("NewsML/NewsItem/Identification/Label/LabelType[@FormalName=\"" + labelType + "\"]");
å¦æè¦è¿åå¤ä¸ªèç¹ç¨SelectNodesãè¿åçæ¯nodelist
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