Asp.netXML文档进行添加删改操作的实例代码

/// 将图片新闻信息写入到图片新闻播放器的XML文件集中
///
/// 图片路径
/// 图片新闻网址
/// 标题
public void WritePicNewsXML(string picpath, string htmlpath, string title,string aid)
{
XmlDocument xmlDoc;
xmlDoc = new XmlDocument();
xmlDoc.Load(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));

XmlNodeList xnl = xmlDoc.SelectSingleNode("bcaster").ChildNodes;
//if (xnl.Count <= 5)//保持首页图片新闻不超过5条
//{
XmlNode rootnode = xmlDoc.SelectSingleNode("bcaster");

XmlElement fel = (XmlElement)rootnode.FirstChild;

XmlElement el = xmlDoc.CreateElement("item");//添加子节点及属性
el.SetAttribute("id", aid);
el.SetAttribute("item_url", picpath);
el.SetAttribute("link", htmlpath);
el.SetAttribute("itemtitle", title);
rootnode.PrependChild(el);//将新加入的图片新闻添加到第一个位置
if (xnl.Count > 5)
{
XmlNode lxn = rootnode.LastChild;
rootnode.RemoveChild(lxn);//删除最末尾的图片新闻
}


xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
//}
}

///

/// 修改XML属性
///

///
///
///
///
public void EditPicNewsXML(string picpath, string htmlpath, string title, string aid)
{

XmlDocument xmlDoc;
xmlDoc = new XmlDocument();
xmlDoc.Load(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));

XmlNodeList xnl = xmlDoc.SelectSingleNode("bcaster").ChildNodes;
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("id") == aid)//如果节点存在则改写
{
xe.SetAttribute("item_url", picpath);
xe.SetAttribute("link", htmlpath);
xe.SetAttribute("itemtitle", title);
break;
}
}

xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
}

///

/// 删除XML指定节点
///

///
public void DelPicNewsXML(string aid)
{
XmlDocument xmlDoc;
xmlDoc = new XmlDocument();
xmlDoc.Load(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));

XmlNodeList xnl = xmlDoc.SelectSingleNode("bcaster").ChildNodes;
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("id") == aid)//如果节点存在删除
{
xe.RemoveAll();
break;
}
}

xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
}