.Net wrapper library
For using the ODABA .Net interface from within MS VB Script, a wrapper library has to be provided for several reasons. The example below shows the wrapper library used for in MS Word macros for document generation.
The ODatabase class Provides functions that allow opening an ODABA database by means of an ini-file. Moreover, it provides functions for reading current option settings ( GetOption() ) and providing extent property handles ( GetProperty() ).
The OProperty class provides property handle access functions. Since several function names used in ODABA are reserved names in VB, some function names had to be changed (e.g. next() became ReadNext() ).
Finally, the OValue class provides enhanced value access to values stored in the database.
The example below is part of the .Net project provided for MS Office support.
Option Strict Off
Option Explicit On
<System.Runtime.InteropServices.ProgId("ODatabase_NET.ODatabase")> Public Class ODatabase
Public ds As odaba.DataSource
Public db As odaba.Database
Public dbo As odaba.ObjectSpace
Public index As Integer
Public stati As Integer
Public Function Open(ByRef inifile As String, ByRef section As String) As Boolean
Dim location As String
Dim language As odaba.Option
Open = True
location = " (inifile='" & inifile & "', section='" & section & "') "
odaba.Application.initialize(inifile, section, odaba.ApplicationTypes.ConsoleApplication)
ds = New odaba.DataSource
ds.open(section)
dbo = ds.objectSpace
db = ds.database
If dbo Is Nothing Or Not dbo.isValid Then
MsgBox("DataSource" & location & "could not be opened")
Open = False
End If
language = New odaba.Option("DSC_Language")
If language.toString() = "" Then
language.assign("English")
End If
End Function
Public Function Close() As Boolean
'UPGRADE_NOTE: Object odaba may not be destroyed until it is garbage collected. Click for more: 'ms-help://MS.VSCC.2003/commoner/redir/redirect.htm?keyword="vbup1029"'
If Not IsNothing(db) Then
db.close()
End If
If Not IsNothing(dbo) Then
dbo.close()
End If
If Not IsNothing(ds) Then
ds.close()
End If
Close = True
End Function
Public Function GetOption(ByRef opt_name As String) As String
Dim opt As odaba.Option
opt = New odaba.Option(opt_name)
GetOption = opt.toString()
End Function
Public Function GetProperty(ByRef ph As OProperty, Optional ByRef prop_path As String = "") As OProperty
Dim oprop As OProperty
Dim cond As Boolean
oprop = New OProperty
cond = False
If prop_path <> "" Then
If ph Is Nothing Then
cond = oprop.Open(dbo, prop_path, odaba.AccessModes.Read)
Else
cond = oprop.Open(ph, prop_path)
End If
End If
If cond Then
GetProperty = oprop
Else
MsgBox("Could not open property handle for '" & prop_path & "'")
GetProperty = Nothing
End If
End Function
End Class
<System.Runtime.InteropServices.ProgId("OProperty_NET.OProperty")> Public Class OProperty
Public prop As odaba.Property
Public Function Count() As Integer
Count = prop.count
End Function
Public Function Open(ByRef oprop As OProperty, ByVal path As String) As Boolean
prop = New odaba.Property(oprop.prop, path)
Open = True
End Function
Private Function Open(ByRef oprop As odaba.Property, ByVal path As String) As Boolean
prop = New odaba.Property(oprop, path)
Open = True
End Function
Public Function Open(ByRef db As odaba.ObjectSpace, ByVal osi_path As String, ByVal accmode As odaba.AccessModes) As Boolean
prop = New odaba.Property(db, osi_path, accmode)
Open = True
End Function
Public Function Read(ByRef key As String) As Boolean
Dim skey As New odaba.Key(key)
Read = False
If prop.tryGet(skey) Then
Read = True
End If
End Function
Public Function Read(ByVal num As Integer) As Boolean
Read = False
If prop.tryGet(num) Then
Read = True
End If
End Function
Public Function ReadFirst(Optional ByVal read_opt As Boolean = True) As Boolean
ReadFirst = prop.first(read_opt)
End Function
Public Function ReadLast(Optional ByVal read_opt As Boolean = True) As Boolean
ReadLast = prop.last(read_opt)
End Function
Public Function ReadNext(Optional ByVal read_opt As Boolean = True) As Boolean
ReadNext = prop.next(read_opt)
End Function
Public Function ReadPrevious(Optional ByVal read_opt As Boolean = True) As Boolean
ReadPrevious = prop.next(read_opt)
End Function
Public Function OProperty(ByRef path As String) As OProperty
Dim oprop As New OProperty
If oprop.Open(prop, path) Then
OProperty = oprop
Else
OProperty = Nothing
End If
End Function
Public Function OValue(ByRef path As String) As OValue
Dim oval As New OValue
If oval.Open(prop, path) Then
OValue = oval
Else
OValue = Nothing
End If
End Function
Public Function Top() As Boolean
prop.top()
Top = True
End Function
Public Function ODABAProperty() As odaba.Property
ODABAProperty = prop
End Function
End Class
<System.Runtime.InteropServices.ProgId("OValue_NET.OValue")> Public Class OValue
Public value As odaba.Value
Public Function Open(ByRef oprop As OProperty) As Boolean
value = oprop.prop.value()
Open = True
End Function
Private Function Open(ByRef prop As odaba.Property) As Boolean
value = prop.value()
Open = True
End Function
Public Function Open(ByRef oprop As OProperty, ByRef path As String) As Boolean
value = oprop.prop.value(path)
Open = True
End Function
Public Function Open(ByRef prop As odaba.Property, ByRef path As String) As Boolean
value = prop.value(path)
Open = True
End Function
Public Function AsBoolean() As Boolean
AsBoolean = False
If AutoSelect() Then
AsBoolean = value.toBool
End If
End Function
Public Function AsInteger() As Integer
AsInteger = 0
If AutoSelect() Then
AsInteger = value.toInteger
End If
End Function
Public Function AsPlainText() As String
AsPlainText = ""
If AutoSelect() Then
AsPlainText = value.toString.toPlainText
End If
End Function
Public Function AsString() As String
AsString = ""
If AutoSelect() Then
AsString = value.toString
End If
End Function
Public Function AutoSelect() As Boolean
AutoSelect = False
value.property.autoSelect()
If value.property.selected Then
AutoSelect = True
End If
End Function
End Class