• 简单的XML在ASP.NET中增删改应用


    using System; 
    using System.Collections; 
    using System.ComponentModel; 
    using System.Data; 
    using System.Drawing; 
    using System.Web; 
    using System.Web.SessionState; 
    using System.Web.UI; 
    using System.Web.UI.WebControls; 
    using System.Web.UI.HtmlControls; 
    using System.Xml; 
    private XmlDocument xmlDoc; 
    //load xml file 
    private void LoadXml() 

        xmlDoc=new XmlDocument(); 
        xmlDoc.Load(Server.MapPath("User.xml")); 

    //添加节点 
    private void AddElement() 

        LoadXml(); 
        XmlNode xmldocSelect=xmlDoc.SelectSingleNode("user"); 
        XmlElement el=xmlDoc.CreateElement("person");     //添加person节点 
        el.SetAttribute("name","风云");     //添加person节点的属性"name" 
        el.SetAttribute("sex","");     //添加person节点的属性 "sex" 
        el.SetAttribute("age","25");     //添加person节点的属性 "age" 
        XmlElement xesub1=xmlDoc.CreateElement("pass");     //添加person节点的里的节点 
        xesub1.InnerText="123";    //设置文本节点 
        el.AppendChild(xesub1); 
        XmlElement xesub2=xmlDoc.CreateElement("Address"); 
        xesub2.InnerText="昆明";    //设置文本节点 
        el.AppendChild(xesub2); 
        xmldocSelect.AppendChild(el); 
        xmlDoc.Save(Server.MapPath("user.xml")); 

    //修改节点 
    private void UpdateElement() 

        LoadXml(); 
        XmlNodeList nodeList=xmlDoc.SelectSingleNode("user").ChildNodes;    //获取bookstore节点的所有子节点 
        foreach(XmlNode xn in nodeList)    //遍历所有子节点 
        { 
            XmlElement xe=(XmlElement)xn;    //将子节点类型转换为XmlElement类型 
            if(xe.GetAttribute("name")=="风云")     //如果name属性值为“风云” 
            { 
                xe.SetAttribute("name","发明"); //如果下面有子节点在下走 
                XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点 
                foreach(XmlNode xn1 in nls)//遍历 
                { 
                    XmlElement xe2=(XmlElement)xn1;//转换类型 
                    if(xe2.Name=="pass")//如果找到 
                    { 
                        xe2.InnerText="66666";//则修改 
                        break
                    } 
                } 
                break
            } 
        } 
        xmlDoc.Save(Server.MapPath("user.xml"));//保存 

    //删出节点 
    private void deleteNode() 

        LoadXml(); 
        XmlNodeList xnl=xmlDoc.SelectSingleNode("user").ChildNodes; 
        foreach(XmlNode xn in xnl) 
        { 
            XmlElement xe=(XmlElement)xn; 
            if(xe.GetAttribute("name")=="发明"
            { 
                //xe.RemoveAttribute("name");//删除name属性 
                xe.RemoveAll();//删除该节点的全部内容 
                break
            } 
        } 
        xmlDoc.Save(Server.MapPath("user.xml"));//保存 

    private void showIt() 

        LoadXml(); 
        XmlNode xn=xmlDoc.SelectSingleNode("user"); 
        XmlNodeList xnl=xn.ChildNodes; 
        foreach(XmlNode xnf in xnl) 
        { 
            XmlElement xe=(XmlElement)xnf; 
            // Console.WriteLine(xe.GetAttribute("name"));//显示属性值 
            // Console.WriteLine(xe.GetAttribute("sex")); 
            // // XmlNodeList xnf1=xe.ChildNodes; 
            // foreach(XmlNode xn2 in xnf1) // 
            { 
                // Console.WriteLine(xn2.InnerText); 
                //显示子节点点文本 
        // 
        } 

    Xml的样式: 
    <?xml version="1.0" encoding="gb2312"?> 
    <user> 
        <person> </person> 
        <person name="风拉" sex="" age="25"> 
            <pass>123</pass> 
            <Address>大明</Address> 
        </person> 
        <person name="风云" sex="" age="25"> 
            <pass>123</pass> 
            <Address>昆明</Address> 
        </person> 
    </user>

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  • 原文地址:https://www.cnblogs.com/chaoa/p/2386114.html
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