学步园

我的XML文件是这样的：

<?xml version="1.0" encoding="utf-8"?><br /> <configuration><br /> <root1><br /> <subRoot1>Default</subRoot1><br /> <subRoot2>Default</subRoot2><br /> <subRoot3>Default</subRoot3><br /> </root1><br /> <root2><br /> <subRoot1>Default</subRoot1><br /> </root2><br /> <root3><br /> <subRoot1>Default</subRoot1><br /> <subRoot2>newValue</subRoot2><br /> </root3><br /> </configuration>

接下来我们对该XML文件进行操纵

/// <summary><br /> /// XML文件路径<br /> /// </summary><br /> string strXmlFilePath = Directory.GetParent(Directory.GetParent(Application.StartupPath).ToString()) + @"/XMLFile1.xml";<br /> /// <summary><br /> /// 新增节点<br /> /// </summary><br /> private void btnAdd_Click(object sender, EventArgs e)<br /> {<br /> XmlDocument xmlDoc = new XmlDocument();<br /> xmlDoc.Load(strXmlFilePath);<br /> XmlNode root = xmlDoc.SelectSingleNode("configuration");//查找根节点<br /> XmlElement xe = xmlDoc.CreateElement("root4");//创建一个<root4>节点</p> <p> XmlElement xesub1 = xmlDoc.CreateElement("subRoot1");<br /> xesub1.InnerText = "Default";//设置节点文本<br /> xe.AppendChild(xesub1);//添加到<root4>节点中<br /> XmlElement xesub2 = xmlDoc.CreateElement("subRoot2");<br /> xesub2.InnerText = "Default";<br /> xe.AppendChild(xesub2);<br /> XmlElement xesub3 = xmlDoc.CreateElement("subRoot3");<br /> xesub3.InnerText = "Default";<br /> xe.AppendChild(xesub3);</p> <p> root.AppendChild(xe);//添加到根节点<br /> xmlDoc.Save(strXmlFilePath);//保存最新XML文件<br /> }<br /> /// <summary><br /> /// 删除root4节点<br /> /// </summary><br /> private void btnRemove_Click(object sender, EventArgs e)<br /> {<br /> XmlDocument xmlDoc = new XmlDocument();<br /> xmlDoc.Load(strXmlFilePath);<br /> XmlNode root = xmlDoc.DocumentElement;<br /> XmlNodeList nodeList = xmlDoc.SelectSingleNode("configuration").ChildNodes;//获取根节点的所有子节点<br /> foreach (XmlNode xn in nodeList)<br /> {<br /> if (xn.Name == "root4")<br /> {<br /> //xn.RemoveAll(); //删除该节点下的全部内容<br /> root.RemoveChild(xn); //移除该子节点<br /> break;<br /> }<br /> }<br /> xmlDoc.Save(strXmlFilePath);//保存最新XML文件<br /> }<br /> /// <summary><br /> /// 修改root3节点下子节点subRoot2的文本<br /> /// </summary><br /> private void btnUpdate_Click(object sender, EventArgs e)<br /> {<br /> XmlDocument xmlDoc = new XmlDocument();<br /> xmlDoc.Load(strXmlFilePath);<br /> XmlNodeList nodeList = xmlDoc.SelectSingleNode("configuration").ChildNodes;//获取根节点的所有子节点<br /> foreach (XmlNode xn in nodeList)//遍历所有子节点<br /> {<br /> if (xn.Name == "root3")<br /> {<br /> XmlNodeList nls = xn.ChildNodes;//继续获取xn子节点的所有子节点<br /> foreach (XmlNode xn1 in nls)//遍历<br /> {<br /> if (xn1.Name == "subRoot2")//找到<br /> {<br /> xn1.InnerText = "newValue";//修改<br /> break;<br /> }<br /> }<br /> break;<br /> }<br /> }<br /> xmlDoc.Save(strXmlFilePath);//保存最新XML文件<br /> }<br /> /// <summary><br /> /// 查看root3节点下子节点subRoot2的文本<br /> /// </summary><br /> private void btnQuery_Click(object sender, EventArgs e)<br /> {<br /> XmlDocument xmlDoc = new XmlDocument();<br /> xmlDoc.Load(strXmlFilePath);<br /> XmlNodeList nodeList = xmlDoc.SelectSingleNode("configuration").ChildNodes;//获取根节点的所有子节点<br /> foreach (XmlNode xn in nodeList)//遍历所有子节点<br /> {<br /> if (xn.Name == "root3")<br /> {<br /> XmlNodeList nls = xn.ChildNodes;//继续获取xn子节点的所有子节点<br /> foreach (XmlNode xn1 in nls)//遍历<br /> {<br /> if (xn1.Name == "subRoot2")//找到<br /> {<br /> label1.Text = xn1.InnerText;<br /> break;<br /> }<br /> }<br /> break;<br /> }<br /> }<br /> }