Resync-Methode – Beispiel (VB)
In diesem Beispiel wird die Verwendung der Resync-Methode zum Aktualisieren von Daten in einem statischen Recordset veranschaulicht.
'BeginResyncVB
'To integrate this code
'replace the data source and initial catalog values
'in the connection strings
Public Sub Main()
On Error GoTo ErrorHandler
'connection and recordset variables
Dim Cnxn As ADODB.Connection
Dim rstTitles As ADODB.Recordset
Dim strCnxn As String
Dim strSQLTitles As String
' Open connection
Set Cnxn = New ADODB.Connection
strCnxn = "Provider='sqloledb';Data Source='MySqlServer';" & _
"Initial Catalog='Pubs';Integrated Security='SSPI';"
Cnxn.Open strCnxn
' Open recordset using object refs to set properties
' that allow for updates to the database
Set rstTitles = New ADODB.Recordset
Set rstTitles.ActiveConnection = Cnxn
rstTitles.CursorType = adOpenKeyset
rstTitles.LockType = adLockOptimistic
strSQLTitles = "titles"
rstTitles.Open strSQLTitles
'rstTitles.Open strSQLTitles, Cnxn, adOpenKeyset, adLockPessimistic, adCmdTable
'the above line of code passes the same refs as the object refs listed above
' Change the type of the first title in the recordset
rstTitles!Type = "database"
' Display the results of the change
MsgBox "Before resync: " & vbCr & vbCr & _
"Title - " & rstTitles!Title & vbCr & _
"Type - " & rstTitles!Type
' Resync with database and redisplay results
rstTitles.Resync
MsgBox "After resync: " & vbCr & vbCr & _
"Title - " & rstTitles!Title & vbCr & _
"Type - " & rstTitles!Type
' clean up
rstTitles.CancelBatch
rstTitles.Close
Cnxn.Close
Set rstTitles = Nothing
Set Cnxn = Nothing
Exit Sub
ErrorHandler:
' clean up
If Not rstTitles Is Nothing Then
If rstTitles.State = adStateOpen Then
rstTitles.CancelBatch
rstTitles.Close
End If
End If
Set rstTitles = Nothing
If Not Cnxn Is Nothing Then
If Cnxn.State = adStateOpen Then Cnxn.Close
End If
Set Cnxn = Nothing
If Err <> 0 Then
MsgBox Err.Source & "-->" & Err.Description, , "Error"
End If
End Sub
'EndResyncVB