If you have an XML string or document you may use it to
open an ActiveX Data Objects (ADO) recordset. You can do this by using the
Microsoft ADO 2.5 Stream object and the new XML integration features in
ADO.
This article describes the mechanism required to load the
following into an ADO 2.5 recordset:
- A string containing XML.
-and-
- An XML DOM Document instance.
Provided the XML data is in the format where ADO recordset can
accept.
To open an XML string as a recordset, use the code that
follows. Make sure that your Visual Basic project has the appropriate
references to the
Microsoft ActiveX Data Access Components 2.5 Library so that ADO can be used as shown.
Sample Code
Public Function RecordsetFromXMLString(sXML As String) As Recordset
Dim oStream As ADODB.Stream
Set oStream = New ADODB.Stream
oStream.Open
oStream.WriteText sXML 'Give the XML string to the ADO Stream
oStream.Position = 0 'Set the stream position to the start
Dim oRecordset As ADODB.Recordset
Set oRecordset = New ADODB.Recordset
oRecordset.Open oStream 'Open a recordset from the stream
oStream.Close
Set oStream = Nothing
Set RecordsetFromXMLString = oRecordset 'Return the recordset
Set oRecordset = Nothing
End Function Please note that the preceding code accepts a String.
The following code accepts a DOM object as the source for the recordset. Note
that the Stream object is not needed:
Public Function RecordsetFromXMLDocument(XMLDOMDocument As DOMDocument) As Recordset
Dim oRecordset As ADODB.Recordset
Set oRecordset = New ADODB.Recordset
oRecordset.Open XMLDOMDocument 'pass the DOM Document instance as the Source argument
Set RecordsetFromXMLDocument = oRecordset 'return the recordset
Set oRecordset = Nothing
End Function After you open the recordset in any of these ways, you can use the
recordset as any other disconnected recordset.
Note that the current
position,
AbsolutePage and other navigation properties are not stored in the XML
document; therefore, the newly opened recordset is always positioned at the
first row.
For
additional information, click the following article number to view the article
in the Microsoft Knowledge Base:
309702Â
(http://kbalertz.com/Feedback.aspx?kbNumber=309702/EN-US/
)
How To Read XML Data into a DataSet by Using Visual Basic .NET
For more information about ADO, see to the
following Web site:
(c) Microsoft Corporation 2000, All Rights Reserved.
Contributions by Edward A. Jezierski, Microsoft Corporation.