对xml的操作使用的类XElement的使用

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操作xml的类比较多，发现XElement类操作xml极其方便，下面列举一些操作方法

1、创建xml

XElement xml = new XElement("root",
new XElement("Parent",
new XElement("Me",
new XElement("son"),
new XElement("daughter")
)));

2、用Lambda表达式

List<string> list = new List<string>(){
"Parent","Me","son"
}; XElement xml=new XElement("root",
list.Select(x=>new XElement(x))
); Console.WriteLine(xml);

Dictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("Name", "zhangsan");
dic.Add("Sex", "男");
dic.Add("Age", "");
XElement xml=new XElement("root",
dic.Select(x=>new XElement(x.Key,x.Value))
); Console.WriteLine(xml);

3、用字符串创建，这种我认为最为简单

string str = "<Parent><Me>张三</Me></Parent>";
XElement xml = XElement.Parse(str); Console.WriteLine(xml);

4、属性

XElement xml = new XElement("students",
new XElement("student",
new XAttribute("id", ""),
new XElement("name", "张三"),
new XElement("age", )));

string str = "<students><student id=\"1\"><name>张三</name><age>12</age></student></students>";
XElement xml = XElement.Parse(str); Console.WriteLine(xml);

5、保存 xml

string str = "<students><student id=\"1\"><name>张三</name><age>12</age></student></students>";
XElement xml = XElement.Parse(str); xml.Save("test.xml");

6、加载

XElement xml = XElement.Load("test.xml");
Console.WriteLine(xml);

7、读取 xml

。。。。。{ XElement xml = XElement.Load("test.xml"); ForXml(xml);
} public static void ForXml(XElement x)
{
printXml(x);
foreach (var item in x.Elements())
{
ForXml(item);
}
}
public static void printXml(XElement x)
{
if (x == null)
return;
if (x.HasElements)
{
Console.WriteLine(x.Name);
}
else
{
Console.WriteLine(x.Name+":"+x.Value);
}
foreach (XAttribute attr in x.Attributes())
{
Console.WriteLine("\t"+attr.Name+":"+attr.Value);
}
}

8、查找某一值

XElement xml = XElement.Load("test.xml"); var item = xml.Descendants().Where(x =>
{
var attr = (int?)x.Attribute("id");
if (attr != null)
{
if (attr.Value == )
return true;
}
return false;
//if (x.Value == "张三")
//{
// return true;
//}
//else
//{
// return false;
//}
});
foreach (XElement x in item)
{
ForXml(x);
}