B4X

Iterate over Direct Children with a Specific Tag

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Demonstrates how to iterate over direct children having a specific tag.

The input XML, available at http://www.chilkatsoft.com/data/fruit.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>

B4X

Dim success As Boolean = False

Dim xml As ChilkatXml
xml.Initialize
Dim child As ChilkatXml
Dim numWithTag As Int
Dim i As Int

'  The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
success = xml.LoadXmlFile("fruit.xml")
If success <> True Then
    Log(xml.LastErrorText)
    Return
End If


'   Get the number of direct children having the tag "fruit";
numWithTag = xml.NumChildrenHavingTag("fruit")

If numWithTag > 0 Then

    For i = 0 To numWithTag - 1
        child = xml.GetNthChildWithTag("fruit", i)
        Log(i & ": " & child.Tag & " : " & child.Content)

    Next
    Log("-----")

    '  Do the same as the above loop, but instead of creating
    '  a new object instance for each child, call GetNthChildWithTag2 to
    '  update the object's reference instead.
    For i = 0 To numWithTag - 1
        '  Navigate to the Nth child.  
        success = xml.GetNthChildWithTag2("fruit", i)
        Log(i & ": " & xml.Tag & " : " & xml.Content)
        '  Navigate back up to the parent:
        success = xml.GetParent2
    Next
    Log("-----")
End If