1、建立一个xml文件
XmlDocument doc = new XmlDocument(); XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "UTF-8", null); doc.AppendChild(dec); XmlElement root = doc.CreateElement("bookstore");//建立根节点 doc.AppendChild(root); XmlElement newBook = _doc.CreateElement("book");//create a new 'book' element //set some attributes newBook.SetAttribute("genre", "Mystery"); newBook.SetAttribute("publicationdate", "2001"); newBook.SetAttribute("ISBN", "123456789"); //create a new 'title' element XmlElement newTitle = _doc.CreateElement("title"); newTitle.InnerText = "Case of the Missing Cookie"; newBook.AppendChild(newTitle); //create new author element XmlElement newAuthor = _doc.CreateElement("author"); newBook.AppendChild(newAuthor); //create new name element XmlElement newName = _doc.CreateElement("name"); newName.InnerText = "Cookie Monster"; newAuthor.AppendChild(newName); //create new price element XmlElement newPrice = _doc.CreateElement("price"); newPrice.InnerText = "9.95"; newBook.AppendChild(newPrice); //add to the current documentdoc.DocumentElement.AppendChild(newBook);//_doc.DocumentElement为猎取xml的根 doc.Save("bb.xml");将 XML 文档保留到指定的位置
2、插进去节点 与建立xml 文件相似
_doc.Load("books.xml"); XmlElement newBook = _doc.CreateElement("book"); newBook.SetAttribute("genre", "Mystery"); newBook.SetAttribute("publicationdate", "2001"); newBook.SetAttribute("ISBN", "123456789"); XmlElement newTitle = _doc.CreateElement("title"); newTitle.InnerText = "Case of the Missing Cookie"; newBook.AppendChild(newTitle); XmlElement newAuthor = _doc.CreateElement("author"); newBook.AppendChild(newAuthor); XmlElement newName = _doc.CreateElement("name"); newName.InnerText = "Cookie Monster"; newAuthor.AppendChild(newName); XmlElement newPrice = _doc.CreateElement("price"); newPrice.InnerText = "9.95"; newBook.AppendChild(newPrice); _doc.DocumentElement.AppendChild(newBook); _doc.Save("booksEdit.xml"); 或许下面如许保留 XmlTextWriter tr = new XmlTextWriter("booksEdit.xml", null);//将xml文档保留,假如存在此文件,则掩盖 tr.Formatting = Formatting.Indented; _doc.WriteContentTo(tr); tr.Close();
3、修正xml节点
将genre属性值为“novel“的节点的genre值改成“updatenovel”,将该节点的子节点的文本修正为“啦啦啦啦”。
XmlNodeList nodeList=xmlDoc.SelectSingleNode("bookstore").ChildNodes;//猎取bookstore节点的一切子节点 foreach(XmlNode xn in nodeList)//遍历一切子节点 { XmlElement xe=(XmlElement)xn;//将子节点范例转换为XmlElement范例 if(xe.GetAttribute("genre")=="novel")//假如genre属性值为“李赞红” { xe.SetAttribute("genre","updatenovel");//则修正该属性为“update李赞红” XmlNodeList nls=xe.ChildNodes;//继承猎取xe子节点的一切子节点 foreach(XmlNode xn1 in nls)//遍历 { XmlElement xe2=(XmlElement)xn1;//转换范例 if(xe2.Name=="title")//假如找到 { xe2.InnerText="亚胜";//则修正 break;//找到退出来就能够了 } } break; } } xmlDoc.Save("bookstore.xml");//保留。
4、删除节点
节点的genre属性,删除 节点。
XmlNodeList xnl=xmlDoc.SelectSingleNode("bookstore").ChildNodes; foreach(XmlNode xn in xnl) { XmlElement xe=(XmlElement)xn; if(xe.GetAttribute("genre")=="fantasy") { xe.RemoveAttribute("genre");//删除genre属性 } else if(xe.GetAttribute("genre")=="update李赞红") { xe.RemoveAll();//删除该节点的全部内容 } } xmlDoc.Save("bookstore.xml");
5、遍历xml
string filePath = "bookstore.xml"; XmlDocument doc = new XmlDocument(); doc.Load(filePath); XmlNode root = doc.DocumentElement; showNode(root); private static void showNode(XmlNode root) { if (root.NodeType==XmlNodeType.Text) { Console.WriteLine(root.Value); } if (root.NodeType==XmlNodeType.Element) { Console.WriteLine(root.Name); } if (root.Attributes!=null&&root.Attributes.Count>0) { foreach (XmlAttribute attr in root.Attributes) { Console.Write("{0}={1} ",attr.Name,attr.Value); } Console.WriteLine(); } XmlNodeList chiledList = root.ChildNodes; foreach (XmlNode child in chiledList) { showNode(child); } }
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