XML增删改查

//增加节点;

 

 protected void Button1_Click(object sender, EventArgs e)    {        XmlDocument xdoc = new XmlDocument();        string mappath = Server.MapPath("xml/bolgbooks.xml");        xdoc.Load(mappath);

        XmlNode root= xdoc.SelectSingleNode("bookstore"); //找到bookstore的跟节点;        XmlElement xe =xdoc .CreateElement("book");   //创建一个book的节点;        xe.SetAttribute("genre", "张三");    //创建book的属性;        xe.SetAttribute("ISBN", "123456");

        XmlElement title = xdoc.CreateElement("title"); //把标题给加进来        title.InnerText = "C#入门宝典";        xe.AppendChild(title);

        XmlElement author = xdoc.CreateElement("author");        author.InnerText = "mike";        xe.AppendChild(author);

        XmlElement price = xdoc.CreateElement("price");        price.InnerText = "100";        xe.AppendChild(price);

        root.AppendChild(xe);     //把book节点添加到bookstore的跟节点;        xdoc.Save(mappath);        Banding();    }    public void Banding()    {        DataSet ds = new DataSet();        ds.ReadXml(Server.MapPath("xml/bolgbooks.xml"));        GridView1.DataSource = ds.Tables[0];        GridView1.DataBind();    }

 

 

//删除节点

 

  protected void Button2_Click(object sender, EventArgs e)    {        XmlDocument xdoc = new XmlDocument();        string mappath = Server.MapPath("xml/bolgbooks.xml");        xdoc.Load(mappath);

        XmlNodeList xmllist = xdoc.SelectSingleNode("bookstore").ChildNodes;

        foreach (XmlNode  xn  in xmllist)        {            XmlElement xe =(XmlElement)xn;            if (xe.GetAttribute("ISBN")=="123")            {                xe.RemoveAll();                break;            }        }        xdoc.Save(mappath);        Banding();    }

 

//修改节点

 

   protected void Button3_Click(object sender, EventArgs e)    {        string file = Server.MapPath("xml/bolgbooks.xml");        XmlDocument doc = new XmlDocument();        doc.Load(file);          //把整个的xml加到内存里面;

        string isbn = "123456";

        XmlNode root = doc.DocumentElement;        foreach (XmlNode node in root.ChildNodes)        {            if (node.Attributes["ISBN"].Value == isbn)            {                XmlNode anthor = node.SelectSingleNode("./author");                anthor.InnerText = "王五";                break;            }        }        doc.Save(file);        Banding();

    }

 

//查找节点

 

 protected void Button4_Click(object sender, EventArgs e)    {        XmlDocument xdoc = new XmlDocument();        string mappath = Server.MapPath("xml/bolgbooks.xml");        xdoc.Load(mappath);

        XmlNode root = xdoc.SelectSingleNode("bookstore"); //找到bookstore的跟节点;        StringBuilder s = new StringBuilder();        StringBuilder s1 = new StringBuilder();        XmlNodeList xlist = root.ChildNodes;        foreach (XmlNode  node in xlist)        {            XmlElement xe = (XmlElement)node;            s1.Append(xe.GetAttribute("ISBN")+"<br>");            s1.Append(xe.GetAttribute("genre"));            XmlNodeList xn = xe.ChildNodes;            foreach (XmlNode xn2 in xn)            {                s.Append(xn2.InnerText+"<br>");            }        }        Label1.Text = s.ToString() ;        Label2.Text = s1.ToString();    }

相关资源：Qt对xml文件的增删改查（附带可运行例子）