LINQ To XML 获取，修改，增加，删除元素的属性

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获取元素属性有两个方法，XElement.Attribute() 和XElement.Attributes() 

简单举个例就知道了

[c-sharp] view plain copy print ?

1. //  we will use this to store a reference to one of the elements in the XML tree.   
2. XElement firstParticipant;   
3.    
4. XDocument xDocument = new XDocument(   
5.   new XElement("BookParticipants", firstParticipant =   
6.     new XElement("BookParticipant",    
7.       new XAttribute("type", "Author"),   
8.       new XElement("FirstName", "Joe"),   
9.       new XElement("LastName", "Rattz"))));   
10.    
11. Console.WriteLine(firstParticipant.Attribute("type").Value);   

//  we will use this to store a reference to one of the elements in the XML tree. XElement firstParticipant;  XDocument xDocument = new XDocument(   new XElement("BookParticipants", firstParticipant =     new XElement("BookParticipant",        new XAttribute("type", "Author"),       new XElement("FirstName", "Joe"),       new XElement("LastName", "Rattz"))));  Console.WriteLine(firstParticipant.Attribute("type").Value);  

[c-sharp] view plain copy print ?

1. //  we will use this to store a reference to one of the elements in the XML tree.   
2. XElement firstParticipant;   
3.    
4. XDocument xDocument = new XDocument(   
5.   new XElement("BookParticipants", firstParticipant =   
6.     new XElement("BookParticipant",    
7.       new XAttribute("type", "Author"),   
8.       new XAttribute("experience", "first-time"),   
9.       new XElement("FirstName", "Joe"),   
10.       new XElement("LastName", "Rattz"))));   
11.    
12. foreach(XAttribute attr in firstParticipant.Attributes())   
13. {   
14.     Console.WriteLine(attr);   
15. }   

//  we will use this to store a reference to one of the elements in the XML tree. XElement firstParticipant;  XDocument xDocument = new XDocument(   new XElement("BookParticipants", firstParticipant =     new XElement("BookParticipant",        new XAttribute("type", "Author"),       new XAttribute("experience", "first-time"),       new XElement("FirstName", "Joe"),       new XElement("LastName", "Rattz"))));  foreach(XAttribute attr in firstParticipant.Attributes()) {     Console.WriteLine(attr); }  

输出

type="Author" 

experience="first-time" 

那么往元素上加属性有如下方法

XElement.Add() 

XElement.AddFirst() 

XElement.AddBeforeThis() 

XElement.AddAfterThis() 

删除元素属性有如下方法

XAttribute.Remove() 

更新元素属性是这样的

XElement.Attribute("someattribute").Value = "beginner"

同样的属性也有XElement.SetAttributeValue() 方法

用起来和XElement.SetElementValue是一样的,这里不举例了

           

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