读:
//打开某文件(假设web.config在根目录中)
string filename=Server.MapPath(\"/\") + @\"WebApplication1\\web.config\";
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 >0 )
{
//DropDownList1.Items.Clear();
foreach(XmlElement el in nodelist)//读元素值
{
//DropDownList1.Items.Add(el.Attributes[\"key\"].InnerXml);
//this.TextBox2.Text=el.Attributes[\"key\"].InnerText;
this.TextBox2.Text=el.Attributes[\"key\"].Value;
this.Label1.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.TextBox2.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: [Page]
<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 xa2=xmldoc.CreateAttribute(\"value\");
xa2.Value=\"first\";
elem.SetAttributeNode(xa);
elem.SetAttributeNode(xa2);
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.listBox1.SelectedItem.ToString();
this.listBox1.Items.Remove(this.listBox1.SelectedItem);
//begin del xmlfile
XmlDocument doc=new XmlDocument();
doc.Load(xmlfile);
XmlNodeList topM=doc.DocumentElement.ChildNodes;
foreach(XmlElement element in topM)
{
if(element.Name==this.comboBox1.Text)
{
//得到该节点的子节点
XmlNodeList nodelist=element.ChildNodes;
foreach(XmlElement el in nodelist)//读元素值
{ [Page]
if(el.Attributes[\"key\"].Value==itemname)
{
element.RemoveChild(el);
}
}//循环元素
}//得到组
}//循环组
doc.Save(xmlfile); //一定要保存一下,否则不起作用
//筛选数据
private void Reader_Xml(string pathFlie)
{
XmlDocument Xmldoc=new XmlDocument();
Xmldoc.Load(pathFlie);
XmlNodeList Record1=Xmldoc.DocumentElement.SelectNodes(Code[@id=’1’])
int f=0;
foreach(XmlNode xnode in Record1)
{
}
}
读取xml节点的数据总结
/*读取xml数据 两种xml方式*/
<aaa>
<bb>something</bb>
<cc>something</cc>
</aaa>
<aaa>
<add key=\"123\" value=\"321\"/>
</aaa>
/*第一种方法*/
DS.ReadXml(\"your xmlfile name\");
Container.DataItem(\"bb\");
Container.DataItem(\"cc\");
DS.ReadXmlSchema(\"your xmlfile name\");
/*第二种方法*/
<aaa>
<add key=\"123\" value=\"321\"/>
</aaa>
如果我要找到123然后取到321应该怎么写呢?
using System.XML;
XmlDataDocument xmlDoc = new System.Xml.XmlDataDocument();
xmlDoc.Load(@\"c:\\Config.xml\");
XmlElement elem = xmlDoc.GetElementById(\"add\");
string str = elem.Attributes[\"value\"].Value
/*第三种方法: SelectSingleNode 读取两种格式的xml *---/
--------------------------------------------------------------------
<?xml version=\"1.0\" encoding=\"utf-8\" ?>
<configuration>
<appSettings>
<ConnectionString>Data Source=yf; user id=ctm_dbo;password=123</ConnectionString>
</appSettings>
</configuration>
--------------------------------------------------------------------------
XmlDocument doc = new XmlDocument(); [Page]
doc.Load(strXmlName);
XmlNode node=doc.SelectSingleNode(\"/configuration/appSettings/ConnectionString\");
if(node!=null)
{
string k1=node.Value; //null
string k2=node.InnerText;//Data Source=yf; user id=ctm_dbo;password=123
string k3=node.InnerXml;//Data Source=yf; user id=ctm_dbo;password=123
node=null;
}
********************************************************************
<?xml version=\"1.0\" encoding=\"utf-8\" ?>
<configuration>
<appSettings>
<add key=\"ConnectionString\" value=\"Data Source=yf; user id=ctm_dbo;password=123\" />
</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;
}
