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GetRows Method Example (VB)

This example uses the GetRows method to retrieve a specified number of rows from a Recordset and to fill an array with the resulting data. The GetRows method will return fewer than the desired number of rows in two cases: either if EOF has been reached, or if GetRows tried to retrieve a record that was deleted by another user. The function returns False only if the second case occurs. The GetRowsOK function is required for this procedure to run.

'BeginGetRowsVB

    '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 rstEmployees As ADODB.Recordset
    Dim Cnxn As ADODB.Connection
    Dim strSQLEmployees As String
    Dim strCnxn As String
    ' array variable
    Dim arrEmployees As Variant
    ' detail variables
    Dim strMessage As String
    Dim intRows As Integer
    Dim intRecord As Integer
    
    ' open connection
    Set Cnxn = New ADODB.Connection
    strCnxn = "Provider='sqloledb';Data Source='MySqlServer';" & _
        "Initial Catalog='Pubs';Integrated Security='SSPI';"
    Cnxn.Open strCnxn
    
    ' open recordset client-side to enable RecordCount
    Set rstEmployees = New ADODB.Recordset
    strSQLEmployees = "SELECT fName, lName, hire_date FROM Employee ORDER BY lName"
    rstEmployees.Open strSQLEmployees, Cnxn, adOpenStatic, adLockReadOnly, adCmdText
    
    ' get user input for number of rows
    Do
        strMessage = "Enter number of rows to retrieve:"
        intRows = Val(InputBox(strMessage))
        
          ' if bad user input exit the loop
        If intRows <= 0 Then
            MsgBox "Please enter a positive number", vbOKOnly, "Not less than zero!"
        ' if number of requested records is over the total
        ElseIf intRows > rstEmployees.RecordCount Then
            MsgBox "Not enough records in Recordset to retrieve " & intRows & " rows.", _
            vbOKOnly, "Over the available total"
        Else
            Exit Do
        End If
    Loop
    
      ' else put the data in an array and print
    arrEmployees = rstEmployees.GetRows(intRows)
    
    Dim x As Integer, y As Integer
    
    For x = 0 To intRows - 1
        For y = 0 To 2
            Debug.Print arrEmployees(y, x) & " ";
        Next y
        Debug.Print vbCrLf
    Next x
    
    ' 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
'EndGetRowsVB
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