asp.net操作xml增删改示例分享

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","女");     //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="男" age="25">
        <pass>123</pass>
        <address>大明</address>
    </person>
    <person name="风云" sex="女" age="25">
        <pass>123</pass>
        <address>昆明</address>
    </person>
</user>