Views-Collection, CommandText-Eigenschaft – Beispiel (VB)

Im folgenden Code wird veranschaulicht, wie Sie die Command-Eigenschaft verwenden, um den Text einer Ansicht zu aktualisieren.

' BeginViewsCollectionVB  
Sub Main()  
    On Error GoTo ViewTextError  
  
    Dim cnn As New ADODB.Connection  
    Dim cat As New ADOX.Catalog  
    Dim cmd As New ADODB.Command  
  
    ' Open the connection.  
    cnn.Open _  
        "Provider='Microsoft.Jet.OLEDB.4.0';" & _  
        "Data Source='Northwind.mdb';"  
  
    ' Open the catalog.  
    Set cat.ActiveConnection = cnn  
  
    ' Get the command.  
    Set cmd = cat.Views("AllCustomers").Command  
  
    ' Update the CommandText of the command.  
    cmd.CommandText = _  
    "Select CustomerId, CompanyName, ContactName From Customers"  
  
    ' Update the view.  
    Set cat.Views("AllCustomers").Command = cmd  
  
    'Clean up.  
    cnn.Close  
    Set cat = Nothing  
    Set cmd = Nothing  
    Set cnn = Nothing  
    Exit Sub  
  
ViewTextError:  
  
    Set cat = Nothing  
    Set cmd = Nothing  
  
    If Not cnn Is Nothing Then  
        If cnn.State = adStateOpen Then cnn.Close  
    End If  
    Set cnn = Nothing  
  
    If Err <> 0 Then  
        MsgBox Err.Source & "-->" & Err.Description, , "Error"  
    End If  
End Sub  
' EndViewsCollectionVB  

Weitere Informationen

ActiveConnection-Eigenschaft (ADOX)
Catalog-Objekt (ADOX)
Command-Eigenschaft (ADOX)
View-Objekt (ADOX)
Views-Collection (ADOX)