View Full Version : XML - Xpath queries not working in some cases

01-11-2009, 04:38 AM

I am new in XML. But I have done coding in VBA, C, and HTML. I am using VBA to extract data from an xml file. I use Xpathbuilder to generate Xpath queries for my work. However, some Xpath queries are causing errors in my program. As I am new in xml and its standards I am not sure what is causing them. Answers to the following questions might help me in understanding these problems better. Can you please help me? Thanks.

1. Which version of xml am I using? In my program I declare variables as shown here. Dim oDoc As MSXML2.DOMDocument, Dim oNodeList As msxml2.IXMLDOMNodeList. Also, in Refrences of the VBA environment I have selected Microsoft xml.V6.0. I have Microsoft XP and Office 2003 SP2.

2. Why the SelectionLanguage property is not working? When I put the following statement in my code, the selectnodes statement gives me an error. Selectnodes work fine without this statement. I don’t know why this is happening.
oDoc.setProperty "SelectionLanguage", "XPath"

3. Why the Selectnodes statement is not working for a few queries? I am using this statement:
Set oChildren = oDoc.selectNodes(Path). This statement works for simple queries such as
Path = /FSK:Research/FSK:Product/FSK:Context/FSK:IssuerDetails/FSK:Issuer/FSK:SecurityDetails/FSK:Security
But causes an error for
Path =
/FSK:Research/FSK:Product/FSK:Context/FSK:IssuerDetails/FSK:Issuer/FSK:SecurityDetails/FSK:Security [@securityID='1404']
Or Path =
/FSK:Research/FSK:Product/FSK:Context/FSK:IssuerDetails/FSK:Issuer/FSK:SecurityDetails/FSK:Security/FSK:FinancialGroup [2]

Note that I have verified these paths using Xpathbuilder.

I am also attaching my code below.


Dim oDoc As msxml2.DOMDocument
Dim fSuccess As Boolean
Dim oRoot As msxml2.IXMLDOMNode
Dim oBegining As msxml2.IXMLDOMNode
Dim oAttributes As msxml2.IXMLDOMNamedNodeMap
Dim oCountryName As msxml2.IXMLDOMNode
Dim oChildren As msxml2.IXMLDOMNodeList
Dim oChild As msxml2.IXMLDOMNode
Dim oNodeList As msxml2.IXMLDOMNodeList

Dim Startcell As Range
Dim temp As String
Dim temp2 As String
Dim Colno As Integer
Dim oCell As Range
Dim Path As String
Dim Counter As Integer

On Error GoTo Exitfun

Set oDoc = CreateObject("MSXML2.DOMDocument")

oDoc.async = False
oDoc.validateOnParse = False

oDoc.Load ("c:\test.xml")

' MsgBox oDoc.XML


Set oRoot = oDoc.documentElement

Set oNodeList = oDoc.getElementsByTagName("FSK:SecurityName") This works fine.

temp = oNodeList.Item(0).childNodes.Item(0).Text

Set Startcell = ActiveCell
Counter = 0 ' to count columns

For Each oCell In Worksheets("Instructions - Introduction").Range("G1:G21")

Path = oCell.Value

Set oChildren = oDoc.selectNodes(Path) This doesn't work sometimes.

Startcell.Offset(0, Counter).Value = oChildren.Length

Counter = Counter + 1
Exit Sub

Exitfun: MsgBox "Error occured" & Counter

End Sub