Asp.net XML document to add the instance code for the deletion operation
- 2020-05-07 19:29:15
- OfStack
The XML file is called bcastr.xml
The structure is as follows:
Function to add node:
Function to modify the attributes of XML node:
Deletes the function of the specified XML node:
The structure is as follows:
<?xml version="1.0" encoding="utf-8"?>
<bcaster>
<item id="79" item_url="PicNews/Img/u=404630538,2075277077" link="HTML/050/AI_20081017_50_53_79.html" itemtitle="111111111111111111" />
<item id="78" item_url="PicNews/Img/Index_04_01_06.jpg" link="HTML/050/AI_20081017_50_53_78.html" itemtitle="zengjia" />
<item id="77" item_url="PicNews/Img/bsxwf.jpg" link="HTML/050/AI_20081017_50_53_77.html" itemtitle=" Graduate school of China pharmaceutical university " />
<item id="76" item_url="PicNews/Img/ Jiangning door .jpg" link="HTML/050/AI_20081017_50_53_76.html" itemtitle=" Photo news of graduate school " />
<item id="75" item_url="PicNews/Img/ China pharmaceutical university standard (perfect 2 ) .jpg" link="HTML/050/AI_20081017_50_53_75.html" itemtitle=" News test photo news " />
</bcaster>
Function to add node:
/// To write the image news information to the image news player XML File set
/// </summary>
/// <param name="picpath"> Image path </param>
/// <param name="htmlpath"> Photo news website </param>
/// <param name="title"> The title </param>
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)// Keep the home page photo news no more than 5 article
//{
XmlNode rootnode = xmlDoc.SelectSingleNode("bcaster");
XmlElement fel = (XmlElement)rootnode.FirstChild;
XmlElement el = xmlDoc.CreateElement("item");// Add child nodes and properties
el.SetAttribute("id", aid);
el.SetAttribute("item_url", picpath);
el.SetAttribute("link", htmlpath);
el.SetAttribute("itemtitle", title);
rootnode.PrependChild(el);// Add the newly added photo news to the page 1 A position
if (xnl.Count > 5)
{
XmlNode lxn = rootnode.LastChild;
rootnode.RemoveChild(lxn);// Delete the last image news
}
xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
//}
}
Function to modify the attributes of XML node:
/// <summary>
/// Modify the XML attribute
/// </summary>
/// <param name="picpath"></param>
/// <param name="htmlpath"></param>
/// <param name="title"></param>
/// <param name="aid"></param>
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)// Rewrite if a node exists
{
xe.SetAttribute("item_url", picpath);
xe.SetAttribute("link", htmlpath);
xe.SetAttribute("itemtitle", title);
break;
}
}
xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
}
Deletes the function of the specified XML node:
/// <summary>
/// delete XML The specified node
/// </summary>
/// <param name="aid"></param>
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)// If a node is deleted
{
xe.RemoveAll();
break;
}
}
xmlDoc.Save(HttpContext.Current.Server.MapPath("../PicNews/bcastr.xml"));
}