Views 集合、CommandText 屬性範例 (VB)

下列程式碼示範如何使用 Command 屬性，更新檢視的文字。

' 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  

另請參閱

ActiveConnection 屬性 (ADOX)
Catalog 物件 (ADOX)
Command 屬性 (ADOX)
View 物件 (ADOX)
Views 集合 (ADOX)