This print for content only-size & color not accurate 7" X 9-1/4" / casebound / malloy

// Load the Inventory.xml document into memory.

XElement doc = XElement.Load("Inventory.xml");

// We will author each of these next...

PrintAllPetNames(doc);

Console.WriteLine();

GetAllFords(doc);

Console.ReadLine();

}

The PrintAllPetNames() method illustrates the use of the XElement.Descendants() method,

which allows you to directly specify a given subelement you wish to navigate to in order to apply a

LINQ query expression. Here we are selecting each PetName value and printing out the contents to

the console:

static void PrintAllPetNames(XElement doc)

{

var petNames = from pn in doc.Descendants("PetName")

select pn.Value;

foreach (var name in petNames)

Console.WriteLine("Name: {0}", name);

}

The GetAllFords() method is very similar in nature. Given the incoming XElement, we define a

where operator and select the all XElements where the Make element is equal to the value "Ford":

static void GetAllFords(XElement doc)

{

var fords = from c in doc.Descendants("Make")

where c.Value == "Ford"

select c;

foreach (var f in fords)

Console.WriteLine("Name: {0}", f);

}

Figure 24-12 shows the output of this program.

C H A P T E R   2 4  

■

P R O G R A M M I N G   W I T H   T H E   L I N Q   A P I S

863

8849CH24.qxd  10/19/07  10:11 AM  Page 863

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Figure 24-12.

LINQ to XML in action