c# 操作 xml

c# 操作 xml

在System.XMl 有以個類可以操作xml

(網上對這些類的記錄真得很少啊 可能因為類比較多吧  msdn的介紹)

創建一個新的xml

            XmlDocument xmldoc = new XmlDocument();
            //在XML的文檔的最頭部加入XML的聲明段落 
            XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration, "", "");
            xmldoc.AppendChild(xmlnode);
            //創建根節點
            XmlElement root = xmldoc.CreateElement("root");
            root.InnerText = "我是根節點";
            xmldoc.AppendChild(root);

            xmldoc.Save(@"D:\My Documents\Visual Studio 2010\Projects\WebApplication2\WebApplication2\test.xml"); 

生成的xml是這樣的

<?xml version="1.0"?>  
<root>我是根節點</root>

另外一種創建創建xml的方法

            XmlDocument xmldoc = new XmlDocument();
            xmldoc.LoadXml(
            "<?xml version=\"1.0\" encoding=\"utf-8\" ?>" +
            "<root>我是根節點</root>"    
            );
            xmldoc.Save(@"D:\My Documents\Visual Studio 2010\Projects\WebApplication2\WebApplication2\test.xml"); 

讀取xml

xml如下

<?xml version="1.0" encoding="utf-8"?>
<root id="root">
    <list num="0">
        <name type="string">minglecun</name>
        <age type="number">55</age>
    </list>
    <list num="1">
        <name type="string">huluwa</name>
        <age type="number">1</age>
    </list>
</root>

            XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load(@"D:\My Documents\Visual Studio 2010\Projects\WebApplication2\WebApplication2\test.xml"); 
            //讀某個節點
            XmlNode xmlnode = xmldoc.SelectSingleNode("//root");
            Console.WriteLine(xmlnode.InnerXml);
            Console.WriteLine("------------------------------------------------");
            XmlNode xmlnode1 = xmldoc.SelectSingleNode("//root//list");
            Console.WriteLine(xmlnode1.InnerXml);
            Console.WriteLine("------------------------------------------------");
            //
            XmlNodeList xn0 = xmldoc.SelectSingleNode("//root").ChildNodes;
            foreach (XmlNode node in xn0)
            {
                Console.WriteLine("========"+node.Name);
            }