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Linq to XML同样是对原C#访问XML文件的方法的封装，简化了用xpath进行xml的查询以及增加，修改，删除xml元素的操作。
C#访问XML文件的常用类：XmlDocument，XmlElement，XmlAttribute，XmlNode，XmlText等;
Linq to XML 中的常用类 ：XDocument，XElement，XAttribute。 废话不多说了，直接上代码： xml文件数据格式如下
public class DataBaseInfo
{
public string ID { get; set; }
public string Company { get; set; }
public string Server { get; set; }
public string DataBase { get; set; }
public string UserName { get; set; }
public string Password { get; set; }
private static XDocument doc = new XDocument();
public static string filePath = ".\\DataBaseInfo.xml";
public DataBaseInfo() {
doc = XDocument.Load(filePath);
}
public DataBaseInfo(string filepath):this()
{
filePath = filepath;
}
/// <summary>
/// 增
/// </summary>
/// <returns></returns>
public bool Add()
{
XElement db = new XElement("DataBase",
new XAttribute("id", ID),
new XElement("company", new XAttribute("value",Company)),
new XElement("server", new XAttribute("value",Server)),
new XElement("database", new XAttribute("value",DataBase)),
new XElement("username", new XAttribute("value",UserName)),
new XElement("password", new XAttribute("value", Password))
);
try
{
//用XElement的Add方法
//XElement doc = XElement.Load(filePath);
//doc.Add(db);
//用XDocument的Add方法
doc.Element("DataBases").Add(db);
doc.Save(filePath);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 删
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public static bool Remove(string id)
{
XElement xe = (from db in doc.Element("DataBases").Elements("DataBase") where db.Attribute("id").Value == id select db).Single() as XElement;
try
{
xe.Remove();
doc.Save(filePath);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 改
/// </summary>
/// <returns></returns>
public bool Modify()
{
XElement xe = (from db in doc.Element("DataBases").Elements("DataBase") where db.Attribute("id").Value.ToString() == ID select db).Single();
try
{
xe.Element("company").Attribute("value").Value = Company;
xe.Element("server").Attribute("value").Value = Server;
xe.Element("database").Attribute("value").Value = DataBase;
xe.Element("username").Attribute("value").Value = UserName;
xe.Element("password").Attribute("value").Value = Password;
doc.Save(filePath);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 查
/// </summary>
/// <returns></returns>
public List<DataBaseInfo> GetAll()
{
List<DataBaseInfo> dbs = (from db in doc.Element("DataBases").Elements("DataBase")
select new DataBaseInfo
{
ID = db.Attribute("id").Value.ToString(),
Company = db.Element("company").Attribute("value").Value.ToString(),
Server = db.Element("server").Attribute("value").Value.ToString(),
DataBase = db.Element("database").Attribute("value").Value.ToString(),
UserName = db.Element("username").Attribute("value").Value.ToString(),
Password = db.Element("password").Attribute("value").Value.ToString()
}).ToList();
return dbs;
}
怎么样，如何对之前DOM方式访问XML熟悉的话， 是不是发现简单了不少呢？
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原文地址：http://www.cnblogs.com/qq260250932/p/5298969.html
