StayInSync 屬性範例 （VB）

此範例示範 StayInSync 屬性如何協助存取階層式 Recordset中的數據列。

外部循環會顯示每個作者的名字和姓氏、狀態和識別。 每個數據列附加的 Recordset 會從 Fields 集合中擷取，並在 每次父 Recordset 移至新數據列時，自動指派給rstTitleAuthor 屬性。 內部循環會顯示附加記錄集中每個數據列的四個字段。

'BeginStayInSyncVB  
Public Sub Main()  
    On Error GoTo ErrorHandler  
  
    Dim Cnxn As ADODB.Connection  
    Dim rst As ADODB.Recordset  
    Dim rstTitleAuthor As New ADODB.Recordset  
    Dim strCnxn As String  
  
    ' Open the connection with Data Shape attributes  
    Set Cnxn = New ADODB.Connection  
    strCnxn = "Provider=MSDataShape;Data Provider='sqloledb';Data Source='MySqlServer';" & _  
        "Initial Catalog='Pubs';Integrated Security='SSPI';"  
    Cnxn.Open strCnxn  
  
    ' Create a recordset  
    Set rst = New ADODB.Recordset  
    rst.StayInSync = True  
    rst.Open "SHAPE {select * from Authors} " & _  
                   "APPEND ( { select * from titleauthor} AS chapTitleAuthor " & _  
                   "RELATE au_id TO au_id) ", Cnxn, , , adCmdText  
  
    Set rstTitleAuthor = rst("chapTitleAuthor").Value  
    Do Until rst.EOF  
        Debug.Print rst!au_fname & " " & rst!au_lname & " " & _  
                   rst!State & " " & rst!au_id  
  
        Do Until rstTitleAuthor.EOF  
            Debug.Print rstTitleAuthor(0) & " " & rstTitleAuthor(1) & " " & _  
                   rstTitleAuthor(2) & " " & rstTitleAuthor(3)  
            rstTitleAuthor.MoveNext  
        Loop  
  
        rst.MoveNext  
    Loop  
  
    ' Clean up  
    rst.Close  
    Cnxn.Close  
    Set rst = Nothing  
    Set Cnxn = Nothing  
    Exit Sub  
  
ErrorHandler:  
    ' Clean up  
    If Not rst Is Nothing Then  
        If rst.State = adStateOpen Then rst.Close  
    End If  
    Set rst = 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  
'EndStayInSyncVB  

另請參閱

Fields 集合 （ADO）
Recordset 物件 （ADO）
StayInSync 屬性