c#读写xml文件
已知有一个XML文件(bookstore.xml)如下:
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已知有一个XML文件(bookstore.xml)如下:
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
<?
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 >
< 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:
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
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 " );
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 " );
结果为:
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
<?
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 >
< 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 >
2、修改节点:将genre属性值为“李赞红“的节点的genre值改为“update李赞红”,将该节点的子节点<author>的文本修改为“亚胜”。
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
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。
// 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。
C#利用XmlTextReader读取XML节点数据
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
<?
xml version="1.0" encoding="utf-8"
?>
< google >
< googleColorBorder > f6fbff </ googleColorBorder >
< googleColorBG > f6fbff </ googleColorBG >
< googleColorLink > 666666 </ googleColorLink >
< googleColorText > 046b7A </ googleColorText >
< googleColorUrl > 008000 </ googleColorUrl >
</ google >
< google >
< googleColorBorder > f6fbff </ googleColorBorder >
< googleColorBG > f6fbff </ googleColorBG >
< googleColorLink > 666666 </ googleColorLink >
< googleColorText > 046b7A </ googleColorText >
< googleColorUrl > 008000 </ googleColorUrl >
</ google >
![](https://yqfile.alicdn.com/img_1c53668bcee393edac0d7b3b3daff1ae.gif?x-oss-process=image/resize,w_1400/format,webp)
![img_405b18b4b6584ae338e0f6ecaf736533.gif](https://yqfile.alicdn.com/img_405b18b4b6584ae338e0f6ecaf736533.gif?x-oss-process=image/resize,w_1400/format,webp)
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() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorBG " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorLink " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorText " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorUrl " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
}
}
{
XmlTextReader xtr = new XmlTextReader( " c:\\AdColor2.xml " );
while (xtr.Read()) {
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorBorder " ) {
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorBG " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorLink " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorText " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
if (xtr.NodeType == XmlNodeType.Element && xtr.LocalName == " googleColorUrl " )
{
Response.Write(xtr.ReadString() + " <br/> " );
}
}
}