Open and Close Methods Example (VB)

This example uses the Open and Close methods on both Recordset and Connection objects that have been opened.

'BeginOpenVB  

    'To integrate this code  
    'replace the data source and initial catalog values  
    'in the connection string  

Public Sub OpenX()  
    On Error GoTo ErrorHandler  

    Dim Cnxn As ADODB.Connection  
    Dim rstEmployees As ADODB.Recordset  
    Dim strCnxn As String  
    Dim strSQLEmployees As String  
    Dim varDate As Variant  

    ' Open connection  
    strCnxn = "Provider='sqloledb';Data Source='MySqlServer';" & _  
        "Initial Catalog='Pubs';Integrated Security='SSPI';"  
    Set Cnxn = New ADODB.Connection  
    Cnxn.Open strCnxn  

    ' Open employee table  
    Set rstEmployees = New ADODB.Recordset  
    strSQLEmployees = "employee"  
    rstEmployees.Open strSQLEmployees, Cnxn, adOpenKeyset, adLockOptimistic, adCmdTable  

    ' Assign the first employee record's hire date  
    ' to a variable, then change the hire date  
    varDate = rstEmployees!hire_date  
    Debug.Print "Original data"  
    Debug.Print "  Name - Hire Date"  
    Debug.Print "  " & rstEmployees!fname & " " & _  
        rstEmployees!lname & " - " & rstEmployees!hire_date  
    rstEmployees!hire_date = #1/1/1900#  
    rstEmployees.Update  
    Debug.Print "Changed data"  
    Debug.Print "  Name - Hire Date"  
    Debug.Print "  " & rstEmployees!fname & " " & _  
        rstEmployees!lname & " - " & rstEmployees!hire_date  

    ' Requery Recordset and reset the hire date  
    rstEmployees.Requery  
    rstEmployees!hire_date = varDate  
    rstEmployees.Update  
    Debug.Print "Data after reset"  
    Debug.Print "  Name - Hire Date"  
    Debug.Print "  " & rstEmployees!fname & " " & _  
       rstEmployees!lname & " - " & rstEmployees!hire_date  

    ' 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  
'EndOpenVB  

See Also

Close Method (ADO)
Connection Object (ADO)
Open Method (ADO Connection)
Open Method (ADO Recordset)
Recordset Object (ADO)