<?
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 >
1、往<bookstore>节点中插入一个<book>节点:
< bookstore >
< book genre ="fantasy" ISBN ="2-3631-4" >
< title > Oberon's Legacy </ title >
< author > Corets, Eva </ author >
< price > 5.95 </ price >
</ book >
</ bookstore >
XmlDocument xmlDoc
=
new
XmlDocument();
xmlDoc.Load( " bookstore.xml " );
XmlNode root = xmlDoc.SelectSingleNode( " bookstore " ); // 查找<bookstore>
XmlElement xe1 = xmlDoc.CreateElement( " book " ); // 创建一个<book>节点
xe1.SetAttribute( " genre " , " 陶维佳 " ); // 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 = " 张三 " ;
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( " bookstore.xml " );
结果为:
xmlDoc.Load( " bookstore.xml " );
XmlNode root = xmlDoc.SelectSingleNode( " bookstore " ); // 查找<bookstore>
XmlElement xe1 = xmlDoc.CreateElement( " book " ); // 创建一个<book>节点
xe1.SetAttribute( " genre " , " 陶维佳 " ); // 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 = " 张三 " ;
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( " bookstore.xml " );
<?
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 ="陶维佳" ISBN ="2-3631-4" >
< title > CS从入门到精通 </ title >
< author > 张三 </ author >
< price > 58.3 </ price >
</ book >
</ bookstore >
2、修改节点:将genre属性值为“陶维佳”的节点的genre值改为“update陶维佳”,将该节点的子节点<author>的文本修改为“比尔盖茨”。
< bookstore >
< book genre ="fantasy" ISBN ="2-3631-4" >
< title > Oberon's Legacy </ title >
< author > Corets, Eva </ author >
< price > 5.95 </ price >
</ book >
< book genre ="陶维佳" ISBN ="2-3631-4" >
< title > CS从入门到精通 </ title >
< author > 张三 </ author >
< price > 58.3 </ price >
</ book >
</ bookstore >
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 " ) == " 陶维佳 " ) // 如果genre属性值为“陶维佳”
{
xe.SetAttribute( " genre " , " update陶维佳 " ); // 则修改该属性为“update陶维佳”
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 = " 比尔盖茨 " ; // 则修改
break ; // 找到退出来就可以了
}
}
break ;
}
}
xmlDoc.Save( " bookstore.xml " ); // 保存。
最后结果为:
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 " ) == " 陶维佳 " ) // 如果genre属性值为“陶维佳”
{
xe.SetAttribute( " genre " , " update陶维佳 " ); // 则修改该属性为“update陶维佳”
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 = " 比尔盖茨 " ; // 则修改
break ; // 找到退出来就可以了
}
}
break ;
}
}
xmlDoc.Save( " bookstore.xml " ); // 保存。
<?
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 ="update陶维佳" ISBN ="2-3631-4" >
< title > CS从入门到精通 </ title >
< author > 比尔盖茨 </ author >
< price > 58.3 </ price >
</ book >
</ bookstore >
3、删除 <book genre="fantasy" ISBN="2-3631-4">节点的genre属性,删除 <book genre="update陶维佳" ISBN="2-3631-4">节点。< bookstore >
< book genre ="fantasy" ISBN ="2-3631-4" >
< title > Oberon's Legacy </ title >
< author > Corets, Eva </ author >
< price > 5.95 </ price >
</ book >
< book genre ="update陶维佳" ISBN ="2-3631-4" >
< title > CS从入门到精通 </ title >
< author > 比尔盖茨 </ author >
< price > 58.3 </ price >
</ book >
</ bookstore >
XmlNodeList xnl
=
xmlDoc.SelectSingleNode(
"
bookstore
"
).ChildNodes;
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute( " genre " ) == " fantasy " )
{
xe.RemoveAttribute( " genre " ); // 删除genre属性
}
else if (xe.GetAttribute( " genre " ) == " update陶维佳 " )
{
xe.RemoveAll(); // 删除该节点的全部内容
}
}
xmlDoc.Save( " bookstore.xml " );
最后结果为:
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute( " genre " ) == " fantasy " )
{
xe.RemoveAttribute( " genre " ); // 删除genre属性
}
else if (xe.GetAttribute( " genre " ) == " update陶维佳 " )
{
xe.RemoveAll(); // 删除该节点的全部内容
}
}
xmlDoc.Save( " bookstore.xml " );
<?
xml version="1.0" encoding="gb2312"
?>
< bookstore >
< book ISBN ="2-3631-4" >
< title > Oberon's Legacy </ title >
< author > Corets, Eva </ author >
< price > 5.95 </ price >
</ book >
< book >
</ book >
</ bookstore >
4、显示所有数据。
< bookstore >
< book ISBN ="2-3631-4" >
< title > Oberon's Legacy </ title >
< author > Corets, Eva </ author >
< price > 5.95 </ price >
</ book >
< book >
</ book >
</ bookstore >
XmlNode xn
=
xmlDoc.SelectSingleNode(
"
bookstore
"
);
XmlNodeList xnl = xn.ChildNodes;
foreach (XmlNode xnf in xnl)
{
XmlElement xe = (XmlElement)xnf;
Console.WriteLine(xe.GetAttribute( " genre " )); // 显示属性值
Console.WriteLine(xe.GetAttribute( " ISBN " ));
XmlNodeList xnf1 = xe.ChildNodes;
foreach (XmlNode xn2 in xnf1)
{
Console.WriteLine(xn2.InnerText); // 显示子节点点文本
}
}
XmlNodeList xnl = xn.ChildNodes;
foreach (XmlNode xnf in xnl)
{
XmlElement xe = (XmlElement)xnf;
Console.WriteLine(xe.GetAttribute( " genre " )); // 显示属性值
Console.WriteLine(xe.GetAttribute( " ISBN " ));
XmlNodeList xnf1 = xe.ChildNodes;
foreach (XmlNode xn2 in xnf1)
{
Console.WriteLine(xn2.InnerText); // 显示子节点点文本
}
}