知识大全读写xml个人小结

Posted 2022-07-17 元素

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　　读 //打开某文件(假设nfig在根目录中) string filename=Server MapPath( / ) + @ WebApplication \\nfig ; XmlDocument xmldoc= new XmlDocument(); xmldoc Load(filename); //得到顶层节点列表 XmlNodeList topM=xmldoc DocumentElement ChildNodes; foreach(XmlElement element in topM) if(element Name ToLower()== appsettings ) //得到该节点的子节点 XmlNodeList nodelist=element ChildNodes; if ( nodelist Count > ) //DropDownList Items Clear(); foreach(XmlElement el in nodelist)//读元素值 //DropDownList Items Add(el Attributes[ key ] InnerXml); //this TextBox Text=el Attributes[ key ] InnerText; this TextBox Text=el Attributes[ key ] Value; this Label Text=el Attributes[ value ] Value; //同样在这里可以修改元素值在后面save // el Attributes[ value ] Value=this TextBox Text; xmldoc Save(filename); 在某节点下增加一个元素并设置值 if(element Name ToLower()== appsettings ) XmlElement elem =xmldoc CreateElement( add ); element AppendChild(elem); elem InnerText= ltp ; xmldoc Save(filename); 效果

　　<appSettings> <add key= 密码 value= admin /> <add>ltp</add> </appSettings> 在某节点下增加一个元素并增加两个属性 if(element Name ToLower()== appsettings ) XmlElement elem =xmldoc CreateElement( add ); element AppendChild(elem); XmlAttribute xa=xmldoc CreateAttribute( key ); xa Value= ltp ; XmlAttribute xa =xmldoc CreateAttribute( value ); xa Value= first ; elem SetAttributeNode(xa); elem SetAttributeNode(xa ); xmldoc Save(filename); 效果 <appSettings> <add key= 密码 value= admin /> <add key= ltp value= first /> </appSettings> //添加空元素 XmlNode node=doc CreateElement(groupname); node InnerText= ; doc LastChild AppendChild(node); doc Save(xmlfile); 删除一个节点元素 string itemname=this listBox SelectedItem ToString(); this listBox Items Remove(this listBox SelectedItem); //begin del xmlfile XmlDocument doc=new XmlDocument(); doc Load(xmlfile); XmlNodeList topM=doc DocumentElement ChildNodes; foreach(XmlElement element in topM) if(element Name==boBox Text) //得到该节点的子节点 XmlNodeList nodelist=element ChildNodes; foreach(XmlElement el in nodelist)//读元素值

doc Load(strXmlName); XmlNode node=doc SelectSingleNode( /configuration/appSettings/ConnectionString ); if(node!=null) string k =node Value; //null string k =node InnerText;//Data Source=yf; user id=ctm_dbo;password= string k =node InnerXml;//Data Source=yf; user id=ctm_dbo;password= node=null; ******************************************************************** <?xml version= encoding= utf ?> <configuration> <appSettings> <add key= ConnectionString value= Data Source=yf; user id=ctm_dbo;password= /> </appSettings> </configuration> ** ** XmlNode node=doc SelectSingleNode( /configuration/appSettings/add ); if(node!=null) string k=node Attributes[ key ] Value; string v=node Attributes[ value ] Value; node=null; * * XmlNode node=doc SelectSingleNode( /configuration/appSettings/add ); if(node!=null) XmlNodeReader nr=new XmlNodeReader(node); nr MoveToContent(); //检查当前节点是否是内容节点如果此节点不是内容节点则读取器向前跳至下一个内容节点或文件结尾 nr MoveToAttribute( value ); string s=nr Value; node=null; cha138/Article/program/net/201311/14008

知识大全 读写xml个人小结

知识大全读写xml个人小结