xmlDocument如何判断一个节点的某个属性是否存在
XmlDocument   oXmlDoc   =   new   XmlDocument();
oXmlDoc.LoadXml(strXML);
XmlNodeList   oNodes   =   oXmlDoc.SelectNodes( "Menu/Department/menuItem ");
...   ...
Response.Write( " <br> "   +   oNodes[i].Attributes[ "menuName "].InnerText);

如果menuName不存在，运行时会报错，我如何加一个是否存在的判断？

------解决方案--------------------
if(oNodes[i].Attributes[ "menuName "] != null)
Response.Write( " <br> " + oNodes[i].Attributes[ "menuName "].InnerText);