1,讀取Rss訂閱XML文件:讀取線上的XML
重慶分公司
重慶分公司
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
namespace XmlTest.com
{
///
/// 獲得線上的Rss信息 / XML格式的
/// 訂閱信息
///
public class LoadOnlineXml
{
private readonly string rssPath;
private readonly string encoding;
///
///
///
/// Rss地址 , 如 : http://news.163.com/special/00011K6L/rss_newstop.xml
/// 此Rss的編碼格式
public LoadOnlineXml(string rssPath , string encoding )
{
this.rssPath = rssPath;
this.encoding = encoding;
}
///
/// 打印目標(biāo)Rss
///
public void writeRss()
{
WebClient web = new WebClient();
Stream stream = web.OpenRead(this.rssPath);
StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(this.encoding));
string rssText = reader.ReadToEnd();
Console.WriteLine(rssText);
stream.Close();
reader.Close();
}
}
} 2,讀取XML
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace XmlTest.com
{
///
/// 讀取XML
///
public class ReaderXml
{
private readonly string xmlPath;
///
///
///
/// XML的地址
public ReaderXml(string xmlPath)
{
this.xmlPath = xmlPath;
}
///
/// 讀XML信息
///
public void readXML()
{
string str = "";
XmlReader reader = XmlReader.Create( this.xmlPath );
int i = 0 , j = 0;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
str += "節(jié)點(diǎn)名 : " + reader.Name
+ Environment.NewLine;
str += ", 節(jié)點(diǎn)類型 : " + reader.NodeType
+ Environment.NewLine;
str += ", 節(jié)點(diǎn)深度 : " + reader.Depth
+ Environment.NewLine;
if (reader.HasAttributes) // 是否存在屬性
{
for (i = 0, j = reader.AttributeCount; i < j; i += 1)
{
reader.MoveToAttribute(i);
str += " 屬性 : " + reader.Name + " 值為 : " + reader.Value
+ Environment.NewLine;
}
}
}
else if ( reader.NodeType == XmlNodeType.Text )
{
if (reader.HasValue) //是否存在文本值
{
str += ", 節(jié)點(diǎn)的文本值 : " + reader.Value
+ Environment.NewLine;
}
}
else
{
}
}
reader.Close();
Console.WriteLine(str);
}
}
} 3,創(chuàng)建一個(gè)XML文件
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Xml;
namespace XmlTest.com
{
///
/// 模擬沒有xml的時(shí)候重建一個(gè)XML文件
///
public class XmlWriterDefault
{
private readonly string xmlpath;
///
///
///
/// xml路徑
public XmlWriterDefault(string xmlpath)
{
this.xmlpath = xmlpath;
}
///
/// 編寫一個(gè)基本的XML文件
///
/// 編碼格式
public void writerDefault( Encoding encoding )
{
if ( !File.Exists( this.xmlpath ) )
{
XmlWriterSettings writer = new XmlWriterSettings();
writer.Encoding = encoding;
using( XmlWriter w = XmlWriter.Create( this.xmlpath , writer ))
{
w.WriteStartElement("fristElement");
w.WriteAttributeString("name" , "Ainy");
w.WriteAttributeString("gender", "male");
w.WriteEndElement();
w.Flush();
}
}
}
}
} 4 , 核心操作
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace XmlTest.com
{
///
/// 對XML信息的增,刪,改
///
public class XmlMainHandler
{
private readonly string xmlPath;
///
///
///
/// 目標(biāo)XML的地址
public XmlMainHandler(string xmlPath)
{
this.xmlPath = xmlPath;
}
///
/// 增加一個(gè)屬性
///
/// 屬性名稱
/// 屬性值
public void addAttribute(string name, string value , string targetName )
{
XmlDocument xdoc = new XmlDocument();
xdoc.Load(this.xmlPath);
foreach (XmlElement xElement in xdoc.DocumentElement.ChildNodes)
{
foreach (XmlElement xE in xElement.ChildNodes)
{
Console.WriteLine("屬性值 : " + xE.GetAttribute("name"));
if (xE.GetAttribute("name") == targetName)
{
XmlAttribute xA = xdoc.CreateAttribute(name);
xA.Value = value;
xE.Attributes.Append(xA);
break;
}
}
}
xdoc.Save(this.xmlPath);
}
///
/// 刪除一個(gè)屬性
///
///
public void removeAttribute(string AttributeName)
{
XmlDocument xdoc = new XmlDocument();
xdoc.Load(this.xmlPath);
XmlNode targetNote = xdoc.SelectSingleNode(@"friends/friend/describe"); //!important : 第一次找到的friends/friend/describe , 如果沒有找到,返回null
if (targetNote != null)
{
// 定義一個(gè)屬性
if (targetNote.Attributes[AttributeName] != null)
{
targetNote.Attributes.Remove(targetNote.Attributes[AttributeName]);
}
else
{
Console.WriteLine("此節(jié)點(diǎn)沒有'{0}'屬性", AttributeName);
}
}
else
{
Console.WriteLine("沒有找到 friends/friend/describe 請檢查");
}
xdoc.Save(this.xmlPath);
}
///
/// 修改一個(gè)屬性
///
///
///
public void editorAttribute(string AttributeName, string value)
{
XmlDocument xdoc = new XmlDocument();
xdoc.Load(this.xmlPath);
XmlNodeList targetList = xdoc.SelectNodes(@"friends/friend/base");
foreach (XmlNode target in targetList)
{
if (target.Attributes[AttributeName] != null)
{
if (target.Attributes[AttributeName].Value == "eisa")
{
target.Attributes[AttributeName].Value = "eisa-" + value;
target.InnerText = "XXX"; //加一個(gè)Text
xdoc.Save(this.xmlPath);
return;
}
}
}
Console.WriteLine("修改屬性 失敗");
}
}
} 附件 : XML friends.xml
