VB.NET

Get XML Attribute Value by Path

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Demonstrates how to get an attribute value by path. VB.NET

Dim success As Boolean = False

' The XML used in this example contains the following:
' This example will get the value of the "spay-neuter" attribute for each pig.

' <pig-rescue>
'   <herd name="Cathy">
' 	<species name="pot belly pig">
' 	    <animal>
' 	        <name>Molly II</name>
' 	        <birth>February, 1998</birth>
' 			<in-date>January, 2000</in-date>
' 			<from>Middle Ave.</from>
' 			<gender spay-neuter="yes">F</gender>
' 			<info>Molly came from a place where an old, ill man had too many animals.
' 	              	The animals were seldom fed and rats would eat the newborn piglets.
' 	             	 When Molly was found at one week old, she was the only piglet of 
' 	              	her siblings who did not get stepped on by a cow. She is a sweet, 
' 	              	friendly pig who likes to hang out on Cathy's porch on the lounge 
' 	              	pad.
' 			</info>
' 		</animal>
' 	    <animal>
' 			<name>Nigel</name>
' 			<birth>June, 1991</birth>
' 			<in-date>August, 1991</in-date>
' 			<from>Breeder</from>
' 			<gender spay-neuter="no">M</gender>
' 			<info>
' 			 	Nigel was the first pig and the reason for the rescue in the
' 			 	first place. He is 13 now and doing well, but takes a number 
' 				of medications, as you can see below.
' 			</info>
' 		</animal>		
' 	</species>
'   </herd>
' </pig-rescue>

Dim xml As New Chilkat.Xml
success = xml.LoadXmlFile("qa_data/xml/twoPigs.xml")

' Use the ChilkatPath method to return the value of a particular attribute at a given path.
' A path ending with "(attributeName)" will return the value for the given attribute.
Dim path As String = "herd|species|animal[0]|gender|(spay-neuter)"
Dim attrValue As String = xml.ChilkatPath(path)
Debug.WriteLine("1st pig spay-neuter: " & attrValue)

path = "herd|species|animal[1]|gender|(spay-neuter)"
attrValue = xml.ChilkatPath(path)
Debug.WriteLine("2nd pig spay-neuter: " & attrValue)

' We could also do it like this:
path = "herd|species|animal[i]|gender|(spay-neuter)"
Dim i As Integer = 0
While i < xml.NumChildrenAt("herd|species")
    xml.I = i
    Debug.WriteLine("spay-neuter for pig number " & (i + 1) & ": " & xml.ChilkatPath(path))
    i = i + 1
End While