C# Xml 操作

  
    

   
     //
   
     读取
   
     

   
     System.Xml.XmlDocument xmlDoc 
   
     =
   
      
   
     new
   
      System.Xml.XmlDocument();
xmlDoc.LoadXml(xml);
XmlNode XNSpec 
   
     =
   
      xmlDoc.SelectSingleNode(
   
     "
   
     spec
   
     "
   
     );
XmlNodeList XLlist 
   
     =
   
      XNSpec.ChildNodes; 
   
     //
   
     读取所有节点
   
     

   
     

   
     foreach
   
      (XmlNode xnnode 
   
     in
   
      XLlist)
{
 
   
     if
   
      (xnnode.Name.ToLower() 
   
     ==
   
      specname)
 {
 returnStr 
   
     =
   
      xnnode.InnerText.Trim();
 }
}


   
     //
   
      插入
   
     

   
     　　　　　　System.Xml.XmlDocument xmlDoc 
   
     =
   
      
   
     new
   
      System.Xml.XmlDocument();
　　　　　　xmlDoc.LoadXml(xml);
 XmlNode XNSpec 
   
     =
   
      xmlDoc.SelectSingleNode(
   
     "
   
     spec
   
     "
   
     );
 XmlNodeList XLlist 
   
     =
   
      XNSpec.ChildNodes;

 
   
     foreach
   
      (XmlNode xnnode 
   
     in
   
      XLlist)
 {
 
   
     if
   
      (xnnode.Name.ToLower() 
   
     ==
   
      lowspecname)
 {
 xnnode.InnerText 
   
     =
   
      specvalue;
 hasSetted 
   
     =
   
      
   
     true
   
     ;
 }
 }

 
   
     //
   
      若没有设定过则需要添加字段
   
     

   
      
   
     if
   
      (
   
     !
   
     hasSetted)
 {
 XmlElement elem 
   
     =
   
      xmlDoc.CreateElement(specname);
 elem.InnerText 
   
     =
   
      specvalue;
 XNSpec.AppendChild(elem);
 }