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Loading XML into the parser
Once the development environment is
configured, creating a DOMDocument object is as simple as declaring
a variable and calling CreateObject with the ProgID "Microsoft.XMLDOM".
Dim xmlDoc As DOMDocument
' Create a DOMDocument
Set xmlDoc = CreateObject("Microsoft.XMLDOM")
After the DOMDocument has been instantiated,
the next step is to load some XML into the parser. The DOMDocument
provides two methods for accomplishing this, load and loadXML.
The load method accepts a string containing the path to an XML
file and would be the appropriate method for loading XML from
a file, but calling the load method causes an "Access Denied"
error to thrown using the emulator or on a device.
' This would be the easiest way to load the
file into the parser, but...
' Returns an "Access Denied" error in the emulator and
on a device
'xmlDoc.Load (App.Path & "\employees.xml")
The only way to workaround this in eVB is
to use the loadXML method. This method accepts one parameter which
is a string containing actual XML, so you can use the file control
to load in the contents of an XML file to a string and then pass
the string containing the XML into the parser. The following code
illustrates this approach:
'Instead, open the XML file with the file
' control and store the contents in a string
Dim sContactsXML As String
Dim fileXML As File
Set fileXML = CreateObject("FileCtl.File")
fileXML.Open App.Path & "\employees.xml", _
fsModeInput, fsAccessRead, fsLockRead
sContactsXML = fileXML.Input(fileXML.LOF)
fileXML.Close
Set fileXML = Nothing
' Load the XML string into the parser
xmlDoc.loadXML sContactsXML
Navigating the DOM and adding data to
a Grid control
I've provided some sample code that
loads the contents of an XML file into a Grid control. To run
the sample code, you need to copy the XML file onto your
device or into the emulator where the program will run. For the
emulator on my machine, it's:-
C:\Windows CE Tools\wce300\MS Pocket C\emulation\palm300\windows\start
menu\.
The file contains XML data from the
Northwind employees table and has the following structure:
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