ParentCatalog 屬性範例 (VB)

下列程式碼示範如何在將資料表附加至目錄之前，先使用 ParentCatalog 屬性來存取提供者專屬的屬性。 該屬性是 AutoIncrement，其會在 Microsoft Jet 資料庫中建立 AutoIncrement 欄位。

' BeginCreateAutoIncrColumnVB  
Sub Main()  
    On Error GoTo CreateAutoIncrColumnError  
  
    Dim cnn As New ADODB.Connection  
    Dim cat As New ADOX.Catalog  
    Dim tbl As New ADOX.Table  
  
    cnn.Open "Provider='Microsoft.Jet.OLEDB.4.0';" & _  
        "Data Source='Northwind.mdb';"  
    Set cat.ActiveConnection = cnn  
  
    With tbl  
        .Name = "MyContacts"  
        Set .ParentCatalog = cat  
        ' Create fields and append them to the new Table object.  
        .Columns.Append "ContactId", adInteger  
        ' Make the ContactId column and auto incrementing column  
        .Columns("ContactId").Properties("AutoIncrement") = True  
        .Columns.Append "CustomerID", adVarWChar  
        .Columns.Append "FirstName", adVarWChar  
        .Columns.Append "LastName", adVarWChar  
        .Columns.Append "Phone", adVarWChar, 20  
        .Columns.Append "Notes", adLongVarWChar  
    End With  
  
    cat.Tables.Append tbl  
    Debug.Print "Table 'MyContacts' is added."  
  
    ' Delete the table as this is a demonstration.  
    cat.Tables.Delete tbl.Name  
    Debug.Print "Table 'MyContacts' is delete."  
  
    'Clean up  
    cnn.Close  
    Set cat = Nothing  
    Set tbl = Nothing  
    Set cnn = Nothing  
    Exit Sub  
  
CreateAutoIncrColumnError:  
  
    Set cat = Nothing  
    Set tbl = 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  
' EndCreateAutoIncrColumnVB  

另請參閱

Append 方法 (ADOX Columns)
Append 方法 (ADOX Tables)
Catalog 物件 (ADOX)
Column 物件 (ADOX)
Columns 集合 (ADOX)
Name 屬性 (ADOX)
ParentCatalog 屬性 (ADOX)
Table 物件 (ADOX)
Type 屬性 (Column) (ADOX)