MSXML2 - How to search specific nodes and replace its child nodes - vba

Question

I have this XML file
I need to search for the <deviceset> element by its name (for example name="DB_") and replace its children subtree <technologies> with updated data.
So far I made function that returns MSXML2.IXMLDOMElement <technologies> with correct structure, but I have no clue how to search and replace in the main document.
I'm trying this approach
'Select everything from table Interlink - This table contains element's names
Dim RS As Recordset
Set RS = CurrentDb.OpenRecordset("SELECT * FROM Interlink")
'Create new document and load the file
Dim oDoc As DOMDocument60
Set oDoc = New DOMDocument60
oDoc.async = False
oDoc.Load CurrentProject.Path & "\JLC_pattern.xml"
Dim Tech As IXMLDOMElement 'I can set this to contain updated <technologies> subtree
'is it better to use IXMLDOMNode? or IXMLDOMDocumentFragment?
Dim devSets As IXMLDOMNodeList 'Collection ?
Dim devSet As IXMLDOMNode 'Node?
'Loop through the recordset, search for elements and replace the subtree <technologies>
Do Until RS.EOF
'Recordset now contains the deviceset name attribute
Debug.Print RS.Fields("lbrDeviceSetName") ' first record contains "DB_"
'I can't find the right method to find the node or collection
'I have tried:
Set devSets = oDoc.getElementsByTagName("deviceset") 'and
Set devSets = oDoc.selectNodes("//eagle/drawing/library/devicesets/deviceset")
'but devSets collection is always empty
For Each devSet In devSets
Debug.Print devSet.baseName ' this does not loop
Next devSet
'I made a function that returns IXMLDOMNode with needed data structure
'Once I find the node I need to replace the subtree
'and move to the next deviceset name
RS.MoveNext
Loop
'Save the modified XML document to disk
oDoc.Save CurrentProject.Path & "\SynthetizedDoc.xml"
RS.Close
'Cleanup...
It may be easier to loop through the collection of nodes and search the recordset instead of looping through the recordset and search the nodes.
Can anyone give me a clue please?
EDIT: I have expanded the VBA code with for each loop
Pattern XML is here JLC_Pattern.xml
EDIT 2: The <technologies> subtree can be quite huge. I don't want to overwhelm this post by code. I have a function getTechnology(tech as string) as IXMLDOMElement that pulls data from DB. Function output content can be downloaded here: IXMLDOMElement.xml The issue is not this function, I just don't know how to insert this output into the correct place of the oDoc

Answer 1

This works for me:
'Create new document and load the file
Dim oDoc As DOMDocument60
Dim devSet As IXMLDOMNode
Set oDoc = New DOMDocument60
oDoc.async = False
'https://learn.microsoft.com/en-us/previous-versions/windows/desktop/ms762632(v=vs.85)
oDoc.SetProperty "ProhibitDTD", False 'needed for MSXML6
oDoc.validateOnParse = False 'or get a DTD-related error
'"The element 'eagle' is used but not declared in the DTD/Schema."
'always test for load errors
If Not oDoc.Load("C:\Tester\JLC_pattern.xml") Then
Debug.Print oDoc.parseError.reason
Exit Sub
End If
'select a single node based on its name attribute value
Set devSet = oDoc.SelectSingleNode("/eagle/drawing/library/devicesets/deviceset[#name='DB_']")
If Not devSet Is Nothing Then
Debug.Print devSet.XML
'work with devSet child nodes...
Else
Debug.Print "node not found"
End If