Wednesday 27 December 2017

Fake namespace! VBA MSXML2 XPath namespace looks like we need to fake a prefix for the default namespace

This is more a TODO post to myself to find a better solution to a VBA Xml programming program. Visitors are welcome to comment at the bottom if they know a better answer.

So a while ago, I had a problem with using XPath to get some elements out of an Xml Dom using VBA Xml library, MSXML2. You can see my SO question about it here. I expressed unhappiness about how we have to fake a prefix when setting the dom's SelectionNamespace.

Today a similar question arose but the twist here is that multiple namespaces have to be set. Here is my answer.

To set multiple namespaces simply space separate thus...


    dom.setProperty "SelectionNamespaces", "xmlns:sf='urn:sobject.enterprise.soap.sforce.com' xmlns:sf2='urn:enterprise.soap.sforce.com'"


(I omitted a couple of namespaces for formatting issues but you get the idea)

So I got some code working for the OP but I'd really like to find a way to not have to fake the prefix. In the source Xml note xmlns="urn:enterprise.soap.sforce.com" has no prefix but in our VBA we have to fake it with "sf2".

As a working resource I'm copying the Xml file here and the code below


<?xml version="1.0" encoding="UTF-8" ?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns="urn:enterprise.soap.sforce.com" xmlns:sf="urn:sobject.enterprise.soap.sforce.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" >
  <soapenv:Header>
    <LimitInfoHeader>
      <limitInfo>
        <current>50</current>
        <limit>5000000</limit>
        <type>API REQUESTS</type>
      </limitInfo>
    </LimitInfoHeader>
  </soapenv:Header>
  <soapenv:Body>
    <queryResponse>
      <result>
        <done>true</done>
        <queryLocator xsi:nil="true"/>
        <records xsi:type="sf:Nodav">
          <sf:Id>a0S0E000000DMUg320</sf:Id>
          <sf:Name>Netta test 11</sf:Name>
        </records>
        <records xsi:type="sf:Nodav">
          <sf:Id>a0S0E000000DMUg321</sf:Id>
          <sf:Name>Netta test 32</sf:Name>
        </records>
        <size>2</size>
      </result>
    </queryResponse>
  </soapenv:Body>
</soapenv:Envelope>


Option Explicit


Sub TestCoreLogic()
    Dim dom As MSXML2.DOMDocument60
    Set dom = New MSXML2.DOMDocument60
    
    dom.Load "N:\xmlfile1.xml"
    Debug.Assert dom.parseError.ErrorCode = 0

    dom.setProperty "SelectionLanguage", "XPath"
    
    dom.setProperty "SelectionNamespaces", "xmlns:sf='urn:sobject.enterprise.soap.sforce.com' xmlns:sf2='urn:enterprise.soap.sforce.com' " & _
            "xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' "
    
    CoreLogic dom
End Sub
'
Function CoreLogic(ByVal xmlDoc As MSXML2.DOMDocument60)

    Dim records As MSXML2.IXMLDOMElement
    Set records = xmlDoc.DocumentElement
    
    Dim lists As MSXML2.IXMLDOMNodeList
    
    'Debug.Assert records.SelectNodes("//soapenv:Envelope").Length = 1
    'Debug.Assert records.SelectNodes("//soapenv:Envelope/soapenv:Body").Length = 1
    'Debug.Assert records.SelectNodes("//soapenv:Envelope/soapenv:Body/sf2:queryResponse").Length = 1
    'Debug.Assert records.SelectNodes("//soapenv:Envelope/soapenv:Body/sf2:queryResponse/sf2:result").Length = 1
    '
    'Debug.Assert records.SelectNodes("//soapenv:Envelope/soapenv:Body/sf2:queryResponse/sf2:result/sf2:records").Length = 2
    'Set lists = records.SelectNodes("//soapenv:Envelope/soapenv:Body/sf2:queryResponse/sf2:result/sf2:records")
    
    Debug.Assert records.SelectNodes("//sf2:records").Length = 2
    Set lists = records.SelectNodes("//sf2:records")

    Dim listNode As MSXML2.IXMLDOMNode
    
    For Each listNode In lists
        Debug.Print "---Email---"
        
        Dim fieldNode As MSXML2.IXMLDOMNode
        For Each fieldNode In listNode.ChildNodes
            Debug.Print "[" & fieldNode.BaseName & "] = [" & fieldNode.Text & "]"
        Next fieldNode
    Next listNode

    Set records = Nothing
    Set lists = Nothing
    Set listNode = Nothing
    Set fieldNode = Nothing


End Function


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