Reading XML file getting error

  • Thread starter Thread starter Eroc
  • Start date Start date
E

Eroc

I'm new to XML files so I'm kinda lost here. I found some example code
on reading an XML file.

My objective is simple. Read the whole XML file into memory.

Here is part of my code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim query As String
Dim Node As XmlNode
Dim sReturnedValue As String

'Add any initialization after the InitializeComponent() call
configFileName = "i:\rpg\configs\config2.xml"
document = New XmlDocument
document.Load(configFileName)

query = "descendant::company[@id='dmo']"
Node = document.DocumentElement.SelectSingleNode(query)
'("descendant::book[@bk:ISBN='1-861001-57-6']", nsmgr)


If Not Node Is Nothing Then
sReturnedValue = Node.Attributes.GetNamedItem("value").Value

Else
MsgBox("Could not find node" & LookFor & " in config file")
End If

End Sub

Here is the error I am getting when I get to the RED line in my code:

An unhandled exception of type 'System.NullReferenceException' occurred
in XML Test.exe

Additional information: Object reference not set to an instance of an
object.

My XML File looks like this:

<?xml version="1.0"?>
<config>
<company id="dmo">
<DefaultBranch>"02"</DefaultBranch>
<TruckSystemType>"MS"</TruckSystemType>
<TruckSystemDataDrive>"D:"</TruckSystemDataDrive>
<CompaniesOnSystem>"3"</CompaniesOnSystem>
<SalesAndServicePrinter>"P1"</SalesAndServicePrinter>
<DeliveryTicketPrinter>"P2"</DeliveryTicketPrinter>
<CounterReceiptPrinter>"P3"</CounterReceiptPrinter>
<TypeTapeBackup>"PKZ"</TypeTapeBackup>
<StatementForm>"Y"</StatementForm>
<OnePartForm>"0000"</OnePartForm>
<TwoPartForm>"0001"</TwoPartForm>
<RemotePath>"i:\rpg"</RemotePath>
<LocalPath>"c:\rpg"</LocalPath>
<CompanyEmailAddress>"(e-mail address removed)"</CompanyEmailAddress>
<DefaultUserName>"Master"</DefaultUserName>
<DefaultWorkstationID>"AA"</DefaultWorkstationID>
<RpgStartUpFile>"c:\rpg\gas\aastart.p"</RpgStartUpFile>
</company>
</config>

Any ideas what I am doing wrong?

Thanks!
Eroc
 
Eroc said:
I'm new to XML files so I'm kinda lost here. I found some example code
on reading an XML file.

My objective is simple. Read the whole XML file into memory.

Here is part of my code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim query As String
Dim Node As XmlNode
Dim sReturnedValue As String

'Add any initialization after the InitializeComponent() call
configFileName = "i:\rpg\configs\config2.xml"
document = New XmlDocument
document.Load(configFileName)

query = "descendant::company[@id='dmo']"
Node = document.DocumentElement.SelectSingleNode(query)
'("descendant::book[@bk:ISBN='1-861001-57-6']", nsmgr)
Click to expand...

This appears to be part of the problem. Looks like you have the code
from the sample still referencing the book:ISBN, and your XML file does
not contain that node name.

I prefer parsing XML using the XMLSerializer class. Leaves all values
in nice convenient properties.
 
Actually that line is commented out, I left it there to reference what
I was suppose to code.

Anyhow you said:

I prefer parsing XML using the XMLSerializer class. Leaves all values
in nice convenient properties.
Click to expand...

How do I go about doing that? Any info you can point me to would be
greatly appreciated.

Thanks,
Eroc
 
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