Lianja

Iterate over Direct Child Nodes by Index

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Demonstrates some ways to iterate over direct child nodes by index.

The input XML, available at http://www.chilkatsoft.com/data/get_child.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Lianja

llSuccess = .F.

loXml = createobject("CkXml")

// The sample input XML is available at http://www.chilkatsoft.com/data/get_child.xml
llSuccess = loXml.LoadXmlFile("get_child.xml")
if (llSuccess <> .T.) then
    ? loXml.LastErrorText
    release loXml
    return
endif

// The NumChildren property contains the number of direct
// child nodes.  Note: The child nodes under "xyz" are NOT
// direct children of "root".  Therefore, the "root" node has
// 7 direct children
? "NumChildren = " + str(loXml.NumChildren)

// Iterate over the direct children by index. The first child
// is at index 0.

for i = 0 to loXml.NumChildren - 1
    //  access the tag and content directly by index:
    ? str(i) + ": " + loXml.GetChildTagByIndex(i) + " : " + loXml.GetChildContentByIndex(i)

next
? "-----"

// Do the same as the above loop, but get the child node
// and access the Tag and Content properties:
for i = 0 to loXml.NumChildren - 1
    loChild = loXml.GetChild(i)
    ? str(i) + ": " + loChild.Tag + " : " + loChild.Content
    release loChild
next
? "-----"

// Do the same as the above loop, but instead of creating
// a new object instance for each child, call GetChild2 to
// update the object's reference instead.
for i = 0 to loXml.NumChildren - 1
    // Navigate to the Nth child.  
    llSuccess = loXml.GetChild2(i)
    ? str(i) + ": " + loXml.Tag + " : " + loXml.Content
    // Navigate back up to the parent:
    llSuccess = loXml.GetParent2()
next
? "-----"

// Notice that the Content of the "xyz" node is empty.  This is correct.
// The "xyz" node has no Content, but 2 direct children


release loXml