C#读写xml文件

代码

<? xml version="1.0" encoding="gb2312" ?>
< bookstore >
 < book genre ="fantasy" ISBN ="2-3631-4" >
 < title > Oberon's Legacy </ title >
 < author > Corets, Eva </ author >
 < price > 5.95 </ price >
 </ book >
</ bookstore >

代码

XmlDocument xmlDoc = new XmlDocument();
 xmlDoc.Load( " da.xml " );
 XmlNode root = xmlDoc.SelectSingleNode( " bookstore " ); // 查找<bookstore>
 XmlElement xe1 = xmlDoc.CreateElement( " book " ); // 创建一个<book>节点
 xe1.SetAttribute( " genre " , " 李赞红 " ); // 设置该节点genre属性
 xe1.SetAttribute( " ISBN " , " 2-3631-4 " ); // 设置该节点ISBN属性
 XmlElement xesub1 = xmlDoc.CreateElement( " title " );
 xesub1.InnerText = " CS从入门到精通 " ; // 设置文本节点
 xe1.AppendChild(xesub1); // 添加到<book>节点中
 XmlElement xesub2 = xmlDoc.CreateElement( " author " );
 xesub2.InnerText = " 候捷 " ;
 xe1.AppendChild(xesub2);
 XmlElement xesub3 = xmlDoc.CreateElement( " price " );
 xesub3.InnerText = " 58.3 " ;
 xe1.AppendChild(xesub3);
 root.AppendChild(xe1); // 添加到<bookstore>节点中
 xmlDoc.Save( " da.xml " );

代码

<? xml version="1.0" encoding="gb2312" ?>
< bookstore >
 < book genre ="fantasy" ISBN ="2-3631-4" >
 < title > Oberon's Legacy </ title >
 < author > Corets, Eva </ author >
 < price > 5.95 </ price >
 </ book >
 < book genre ="李赞红" ISBN ="2-3631-4" >
 < title > CS从入门到精通 </ title >
 < author > 候捷 </ author >
 < price > 58.3 </ price >
 </ book >
</ bookstore >

代码

XmlNodeList nodeList = xmlDoc.SelectSingleNode( " bookstore " ).ChildNodes;
// 获取bookstore节点的所有子节点
foreach (XmlNode xn in nodeList) // 遍历所有子节点
{
    XmlElement xe = (XmlElement)xn; // 将子节点类型转换为XmlElement类型
     if (xe.GetAttribute( " genre " ) == " 李赞红 " ) // 如果genre属性值为“李赞红”
    {
        xe.SetAttribute( " genre " , " update李赞红 " ); // 则修改该属性为“update李赞红”
        XmlNodeList nls = xe.ChildNodes; // 继续获取xe子节点的所有子节点
          foreach (XmlNode xn1 in nls) // 遍历
         {
              XmlElement xe2 = (XmlElement)xn1; // 转换类型
               if (xe2.Name == " author " ) // 如果找到
              {
                   xe2.InnerText = " 亚胜 " ; // 则修改
                    break ; // 找到退出来就可以了
              }
         }
          break ;
   }
}
xmlDoc.Save( " bookstore.xml " ); // 保存。

代码

<? xml version="1.0" encoding="utf-8" ?>
< google >
 < googleColorBorder > f6fbff </ googleColorBorder >
 < googleColorBG > f6fbff </ googleColorBG >
 < googleColorLink > 666666 </ googleColorLink >
 < googleColorText > 046b7A </ googleColorText >
 < googleColorUrl > 008000 </ googleColorUrl >
</ google >

代码

protected void Page_Load( object sender, EventArgs e)
 {
 XmlTextReader xtr = new XmlTextReader( " c:\\AdColor2.xml " );
 while (xtr.Read()) {
 if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorBorder " ) {
 Response.Write(xtr.ReadString() + " " );
 }

 if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorBG " )
 {
 Response.Write(xtr.ReadString() + " " );
 }

 if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorLink " )
 {
 Response.Write(xtr.ReadString() + " " );
 }

 if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorText " )
 {
 Response.Write(xtr.ReadString() + " " );
 }

 if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorUrl " )
 {
 Response.Write(xtr.ReadString() + " " );
 }

 }
 }

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