Ejemplo del método Refresh (VB)

Se aplica a: Access 2013, Office 2013

En este ejemplo se muestra cómo utilizar el método Refresh para actualizar la colección Parameters de un objeto Command de un procedimiento almacenado.

 
Option Explicit 
 
'BeginRefreshVB 
Public Sub Main() 
 On Error GoTo ErrorHandler 
 
 'To integrate this code 
 'replace the data source and initial catalog values 
 'in the connection strings 
 
 ' connection and recordset variables 
 Dim Cnxn As ADODB.Connection 
 Dim cmdByRoyalty As ADODB.Command 
 Dim rstByRoyalty As ADODB.Recordset 
 Dim rstAuthors As ADODB.Recordset 
 Dim strCnxn As String 
 Dim strSQLAuthors As String 
 ' record variables 
 Dim intRoyalty As Integer 
 Dim strAuthorID As String 
 Dim strRoyalty 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 a command object for a stored procedure 
 ' with one parameter 
 Set cmdByRoyalty = New ADODB.Command 
 Set cmdByRoyalty.ActiveConnection = Cnxn 
 cmdByRoyalty.CommandText = "byroyalty" 
 cmdByRoyalty.CommandType = adCmdStoredProc 
 cmdByRoyalty.Parameters.Refresh 
 
 ' Get parameter value, execute the command 
 ' and store the results in a recordset 
 strRoyalty = InputBox("Enter royalty:") 
 If strRoyalty = "" Then 
 Err.Raise 1, , "You either didn't enter royalty or canceled the input box. Exit the application" 
 End If 
 
 intRoyalty = Trim(strRoyalty) 
 cmdByRoyalty.Parameters(1) = intRoyalty 
 Set rstByRoyalty = cmdByRoyalty.Execute() 
 
 ' Open the Authors table to get author names for display 
 Set rstAuthors = New ADODB.Recordset 
 strSQLAuthors = "Authors" 
 rstAuthors.Open strSQLAuthors, Cnxn, adOpenForwardOnly, adLockPessimistic, adCmdTable 
 
 ' Print current data in the recordset 
 ' and add author names 
 Debug.Print "Authors with " & intRoyalty & " percent royalty" 
 
 Do Until rstByRoyalty.EOF 
 strAuthorID = rstByRoyalty!au_id 
 Debug.Print " " & rstByRoyalty!au_id & ", "; 
 rstAuthors.Filter = "au_id = '" & strAuthorID & "'" 
 Debug.Print rstAuthors!au_fname & " "; rstAuthors!au_lname 
 rstByRoyalty.MoveNext 
 Loop 
 
 ' clean up 
 rstByRoyalty.Close 
 rstAuthors.Close 
 Cnxn.Close 
 Set rstByRoyalty = Nothing 
 Set rstAuthors = Nothing 
 Set Cnxn = Nothing 
 Exit Sub 
 
ErrorHandler: 
 ' clean up 
 If Not rstByRoyalty Is Nothing Then 
 If rstByRoyalty.State = adStateOpen Then rstByRoyalty.Close 
 End If 
 Set rstByRoyalty = Nothing 
 
 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 
'EndRefreshVB