Ejemplo de la propiedad de ordenación (VB)

En este ejemplo se usa la propiedad Sort del objeto Recordset para reordenar las filas de un objeto Recordset derivado de la tabla Authors de la base de datos Pubs. Una rutina de utilidad secundaria imprime cada fila.

'BeginSortVB  
  
    'To integrate this code  
    'replace the data source and initial catalog values  
    'in the connection string  
  
Public Sub Main()  
    On Error GoTo ErrorHandler  
  
     ' connection and recordset variables  
    Dim Cnxn As New ADODB.Connection  
    Dim rstAuthors As New ADODB.Recordset  
    Dim strCnxn As String  
    Dim strSQLAuthors As String  
  
    Dim strTitle 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 client-side recordset to enable sort method  
    Set rstAuthors = New ADODB.Recordset  
    rstAuthors.CursorLocation = adUseClient  
    strSQLAuthors = "SELECT * FROM Authors"  
    rstAuthors.Open strSQLAuthors, Cnxn, adOpenStatic, adLockReadOnly, adCmdText  
  
     ' sort the recordset last name ascending  
    rstAuthors.Sort = "au_lname ASC, au_fname ASC"  
     ' show output  
    Debug.Print "Last Name Ascending:"  
    Debug.Print "First Name  Last Name" & vbCr  
  
    rstAuthors.MoveFirst  
    Do Until rstAuthors.EOF  
        Debug.Print rstAuthors!au_fname & " " & rstAuthors!au_lname  
        rstAuthors.MoveNext  
    Loop  
  
     ' sort the recordset last name descending  
    rstAuthors.Sort = "au_lname DESC, au_fname ASC"  
     ' show output  
    Debug.Print "Last Name Descending"  
    Debug.Print "First Name  Last Name" & vbCr  
  
    Do Until rstAuthors.EOF  
        Debug.Print rstAuthors!au_fname & " " & rstAuthors!au_lname  
        rstAuthors.MoveNext  
    Loop  
  
    ' clean up  
    rstAuthors.Close  
    Cnxn.Close  
    Set rstAuthors = Nothing  
    Set Cnxn = Nothing  
    Exit Sub  
  
ErrorHandler:  
    ' clean up  
    If Not rstAuthors Is Nothing Then  
        If rstAuthors.State = adStateOpen Then rstAuthors.Close  
    End If  
    Set rstAuthors = 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  
'EndSortVB  

Esta es la rutina de utilidad secundaria que imprime el título especificado y el contenido del objeto Recordset especificado.

Attribute VB_Name = "Sort"  

Consulte también

Objeto de conjunto de registros (ADO)
Propiedad de ordenación