XML文件标签名一致,而属性值不同,如何遍历取值写法 摘录

StringBuilder sb = new StringBuilder();

XmlNode ndQualification = el.SelectSingleNode("JobPositionInformation/JobPositionDescription/EssentialFunctions");
string _attr_source = "";
string _attr_desc = "";
string _attr_category = "";
foreach (XmlNode node in ndQualification.ChildNodes)
{                
      if (!XmlUtility.IsEmpty(node))
      {
             if(node.Attributes["source"] != null)
                   _attr_source = (String.IsNullOrEmpty(node.Attributes["source"].Value))?"":node.Attributes["source"].Value;
             if(node.Attributes["description"] != null)
                  _attr_desc = (String.IsNullOrEmpty(node.Attributes["description"].Value))?"":node.Attributes["description"].Value;
             if(node.Attributes["category"] != null)
                   _attr_category = (String.IsNullOrEmpty(node.Attributes["category"].Value))?"":node.Attributes["category"].Value;
             if(_attr_source.Length > 0)
                  sb.Append(string.Format(" <b>source:</b>{0};", _attr_source));
             if(_attr_desc.Length > 0)
                   sb.Append(string.Format(" <b>description:</b>{0};", _attr_desc));
             if(_attr_category.Length > 0)
                   sb.Append(string.Format(" <b>category:</b>{0};", _attr_category));
             sb.Append("<br>");
             sb.Append(node.InnerText.Trim()); //节点值
             sb.Append("<br><br>");

             _attr_source = "";
             _attr_desc = "";
             _attr_category = "";
        }
}
         
 return sb.ToString();