AbsolutePosition および CursorLocation プロパティの例 (VB)AbsolutePosition and CursorLocation Properties Example (VB)

この例では、どのようにAbsolutePositionプロパティのすべてのレコードを列挙するループの進行状況を追跡できます、レコード セットします。This example demonstrates how the AbsolutePosition property can track the progress of a loop that enumerates all the records of a Recordset. 使用して、 CursorLocationプロパティを有効にする、 AbsolutePositionクライアント カーソルをカーソルを設定するプロパティ。It uses the CursorLocation property to enable the AbsolutePosition property by setting the cursor to a client cursor.

'BeginAbsolutePositionVB  
  
    'To integrate this code  
    'replace the data source and initial catalog values  
    'in the connection string  
  
Public Sub Main()  
    On Error GoTo ErrorHandler  
  
    'recordset and connection variables  
    Dim rstEmployees As ADODB.Recordset  
    Dim Cnxn As ADODB.Connection  
    Dim strCnxn As String  
    Dim strSQL As String  
        'record variables  
    Dim strMessage 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 Employee recordset with  
    ' Client-side cursor to enable AbsolutePosition property  
    Set rstEmployees = New ADODB.Recordset  
    strSQL = "employee"  
    rstEmployees.Open strSQL, strCnxn, adUseClient, adLockReadOnly, adCmdTable  
  
    ' Enumerate Recordset  
    Do While Not rstEmployees.EOF  
        ' Display current record information  
        strMessage = "Employee: " & rstEmployees!lname & vbCr & _  
            "(record " & rstEmployees.AbsolutePosition & _  
            " of " & rstEmployees.RecordCount & ")"  
        If MsgBox(strMessage, vbOKCancel) = vbCancel Then Exit Do  
        rstEmployees.MoveNext  
    Loop  
  
    ' clean up  
    rstEmployees.Close  
    Cnxn.Close  
    Set rstEmployees = Nothing  
    Set Cnxn = Nothing  
    Exit Sub  
  
ErrorHandler:  
   ' clean up  
    If Not rstEmployees Is Nothing Then  
        If rstEmployees.State = adStateOpen Then rstEmployees.Close  
    End If  
    Set rstEmployees = 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  
'EndAbsolutePositionVB  

関連項目See Also

AbsolutePosition プロパティ (ADO) AbsolutePosition Property (ADO)
CursorLocation プロパティ (ADO) CursorLocation Property (ADO)
Recordset オブジェクト (ADO)Recordset Object (ADO)