仍然是有关xml的

 

You load an XmlDocument named doc with the following XML.

<bookstore>

<books>

<book genre=”reference”>

<title>Dictionary</title>

</book>

<book genre=”reference”>

<title>World Atlas</title>

</book></books>

</bookstore>

You need to change the value for the genre attribute to NA for all book attributes.

First, you add the following code segment to your class. 

XmlElement root = doc.DocumentElement;

XmlNodelist nodes = root.SelectNodes(“books/book”);

Which additional two code segments can you use to achieve this goal?(Each correct answer presents a complete solution. Choose two.)

A.  foreach(XmlNode node in nodes){node.Attributes[0].Value = “NA”;}

B.  foreach(XmlNode node in nodes){node.Attributes[1].Value = “NA”;}

C.  foreach(XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“/genre”); genre.Value = “NA”;}

D.  foreach(XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“@genre”); genre.Value = “NA”;}

E.   foreach(XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“genre”); genre.Value = “NA”;}