| title | Handler Property Example (VB) | Microsoft Docs | |
|---|---|---|
| ms.prod | sql | |
| ms.prod_service | connectivity | |
| ms.technology | connectivity | |
| ms.custom | ||
| ms.date | 01/19/2017 | |
| ms.reviewer | ||
| ms.topic | conceptual | |
| dev_langs |
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| helpviewer_keywords |
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| ms.assetid | 9664f9a6-65fc-4e7f-be3d-3e4b501b558a | |
| author | MightyPen | |
| ms.author | genemi |
Important
Beginning with Windows 8 and Windows Server 2012, RDS server components are no longer included in the Windows operating system (see Windows 8 and Windows Server 2012 Compatibility Cookbook for more detail). RDS client components will be removed in a future version of Windows. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Applications that use RDS should migrate to WCF Data Service.
This example demonstrates the RDS DataControl object Handler property. (See DataFactory Customization for more details.)
Assume that the following sections in the parameter file, Msdfmap.ini, are located on the server:
[connect AuthorDataBase]
Access=ReadWrite
Connect="DSN=Pubs"
[sql AuthorById]
SQL="SELECT * FROM Authors WHERE au_id = ?"
Your code looks like the following. The command assigned to the SQL property will match the AuthorById identifier and will retrieve a row for author Michael O'Leary. The DataControl object Recordset property is assigned to a disconnected Recordset object purely as a coding convenience.
'BeginHandlerVB
Public Sub Main()
On Error GoTo ErrorHandler
Dim dc As New DataControl
Dim rst As ADODB.Recordset
dc.Handler = "MSDFMAP.Handler"
dc.ExecuteOptions = 1
dc.FetchOptions = 1
dc.Server = "https://MyServer"
dc.Connect = "Data Source=AuthorDataBase"
dc.SQL = "AuthorById('267-41-2394')"
dc.Refresh 'Retrieve the record
Set rst = dc.Recordset 'Use another Recordset as a convenience
Debug.Print "Author is '" & rst!au_fname & " " & rst!au_lname & "'"
' clean up
If rst.State = adStateOpen Then rst.Close
Set rst = Nothing
Set dc = Nothing
Exit Sub
ErrorHandler:
' clean up
If Not rst Is Nothing Then
If rst.State = adStateOpen Then rst.Close
End If
Set rst = Nothing
Set dc = Nothing
If Err <> 0 Then
MsgBox Err.Source & "-->" & Err.Description, , "Error"
End If
End Sub
'EndHandlerVB