EXEMPLO DE CONEXAO COM O POSTGREE

USUARIO.EXCLUIDOS 29/12/2003 11:30:13
#2734 Resposta escolhida

TRABALHAR COM VB+ POSTGRESQL VIA ODBC


Dim WithEvents adoPrimaryRS As Recordset
Dim mbChangedByCode As Boolean
Dim mvBookMark As Variant
Dim mbEditFlag As Boolean
Dim mbAddNewFlag As Boolean
Dim mbDataChanged As Boolean

Private Sub Form_Load()
Dim db As Connection
Set db = New Connection
db.CursorLocation = adUseClient
db.Open "PROVIDER=MSDASQL;dsn=PostgreSQL;uid=joao;pwd=PASS;database=mvdoctab;"

Set adoPrimaryRS = New Recordset
adoPrimaryRS.Open "select ent_num,ent_nome,ent_num_contr,ent_num_ei,cpos_codig1,cpost_desig,cod_pais,ent_tel,ent_fax,ent_mail,contacon,contaei,data_int,cod_util,ent_codig from entidades", db, adOpenStatic, adLockOptimistic

Dim oText As TextBox
'Bind the text boxes to the data provider
For Each oText In Me.txtFields
Set oText.DataSource = adoPrimaryRS
Next

mbDataChanged = False
End Sub

Private Sub Form_Resize()
On Error Resume Next
lblStatus.Width = Me.Width - 1500
cmdNext.Left = lblStatus.Width + 700
cmdLast.Left = cmdNext.Left + 340
End Sub

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
If mbEditFlag Or mbAddNewFlag Then Exit Sub

Select Case KeyCode
Case vbKeyEscape
cmdClose_Click
Case vbKeyEnd
cmdLast_Click
Case vbKeyHome
cmdFirst_Click
Case vbKeyUp, vbKeyPageUp
If Shift = vbCtrlMask Then
cmdFirst_Click
Else
cmdPrevious_Click
End If
Case vbKeyDown, vbKeyPageDown
If Shift = vbCtrlMask Then
cmdLast_Click
Else
cmdNext_Click
End If
End Select
End Sub

Private Sub Form_Unload(Cancel As Integer)
Screen.MousePointer = vbDefault
End Sub

Private Sub adoPrimaryRS_MoveComplete(ByVal adReason As ADODB.EventReasonEnum, ByVal pError As ADODB.Error, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
'This will display the current record position for this recordset
lblStatus.Caption = "Record: " & CStr(adoPrimaryRS.AbsolutePosition)
End Sub

Private Sub adoPrimaryRS_WillChangeRecord(ByVal adReason As ADODB.EventReasonEnum, ByVal cRecords As Long, adStatus As ADODB.EventStatusEnum, ByVal pRecordset As ADODB.Recordset)
'This is where you put validation code
'This event gets called when the following actions occur
Dim bCancel As Boolean

Select Case adReason
Case adRsnAddNew
Case adRsnClose
Case adRsnDelete
Case adRsnFirstChange
Case adRsnMove
Case adRsnRequery
Case adRsnResynch
Case adRsnUndoAddNew
Case adRsnUndoDelete
Case adRsnUndoUpdate
Case adRsnUpdate
End Select

If bCancel Then adStatus = adStatusCancel
End Sub

Private Sub cmdAdd_Click()
On Error GoTo AddErr
With adoPrimaryRS
If Not (.BOF And .EOF) Then
mvBookMark = .Bookmark
End If
.AddNew
lblStatus.Caption = "Add record"
mbAddNewFlag = True
SetButtons False
End With

Exit Sub
AddErr:
MsgBox Err.Description
End Sub

Private Sub cmdDelete_Click()
On Error GoTo DeleteErr
With adoPrimaryRS
.Delete
.MoveNext
If .EOF Then .MoveLast
End With
Exit Sub
DeleteErr:
MsgBox Err.Description
End Sub

Private Sub cmdRefresh_Click()
'This is only needed for multi user apps
On Error GoTo RefreshErr
adoPrimaryRS.Requery
Exit Sub
RefreshErr:
MsgBox Err.Description
End Sub

Private Sub cmdEdit_Click()
On Error GoTo EditErr

lblStatus.Caption = "Edit record"
mbEditFlag = True
SetButtons False
Exit Sub

EditErr:
MsgBox Err.Description
End Sub
Private Sub cmdCancel_Click()
On Error Resume Next

SetButtons True
mbEditFlag = False
mbAddNewFlag = False
adoPrimaryRS.CancelUpdate
If mvBookMark 0 Then
adoPrimaryRS.Bookmark = mvBookMark
Else
adoPrimaryRS.MoveFirst
End If
mbDataChanged = False

End Sub

Private Sub cmdUpdate_Click()
On Error GoTo UpdateErr

adoPrimaryRS.UpdateBatch adAffectAll

If mbAddNewFlag Then
adoPrimaryRS.MoveLast 'move to the new record
End If

mbEditFlag = False
mbAddNewFlag = False
SetButtons True
mbDataChanged = False

Exit Sub
UpdateErr:
MsgBox Err.Description
End Sub

Private Sub cmdClose_Click()
Unload Me
End Sub

Private Sub cmdFirst_Click()
On Error GoTo GoFirstError

adoPrimaryRS.MoveFirst
mbDataChanged = False

Exit Sub

GoFirstError:
MsgBox Err.Description
End Sub

Private Sub cmdLast_Click()
On Error GoTo GoLastError

adoPrimaryRS.MoveLast
mbDataChanged = False

Exit Sub

GoLastError:
MsgBox Err.Description
End Sub

Private Sub cmdNext_Click()
On Error GoTo GoNextError

If Not adoPrimaryRS.EOF Then adoPrimaryRS.MoveNext
If adoPrimaryRS.EOF And adoPrimaryRS.RecordCount 0 Then
Beep
'moved off the end so go back
adoPrimaryRS.MoveLast
End If
'show the current record
mbDataChanged = False

Exit Sub
GoNextError:
MsgBox Err.Description
End Sub

Private Sub cmdPrevious_Click()
On Error GoTo GoPrevError

If Not adoPrimaryRS.BOF Then adoPrimaryRS.MovePrevious
If adoPrimaryRS.BOF And adoPrimaryRS.RecordCount 0 Then
Beep
'moved off the end so go back
adoPrimaryRS.MoveFirst
End If
'show the current record
mbDataChanged = False

Exit Sub

GoPrevError:
MsgBox Err.Description
End Sub

Private Sub SetButtons(bVal As Boolean)
cmdAdd.Visible = bVal
cmdEdit.Visible = bVal
cmdUpdate.Visible = Not bVal
cmdCancel.Visible = Not bVal
cmdDelete.Visible = bVal
cmdClose.Visible = bVal
cmdRefresh.Visible = bVal
cmdNext.Enabled = bVal
cmdFirst.Enabled = bVal
cmdLast.Enabled = bVal
cmdPrevious.Enabled = bVal
End Sub

USUARIO.EXCLUIDOS 29/12/2003 15:16:27
#2787

Os drivers ODBC para PostGres são fáceis de encontrar na Net.
Eu mesmo tenho várias versões.
Quanto ao actualizar o MDAC suponho que será necessário. Não tenho a certeza, pois utilizei o POSTGRES apenas para testes e, devido à s dificuldades que tive em trabalhar com ele e o Windows acabei por pà'-lo de parte.

USUARIO.EXCLUIDOS 29/12/2003 15:23:00
#2791

Já agora. aproveitando a questão:

- Enviei há tempos vários projectos de exemplo para o WebMaster(entre eles este sobre o Postgres), que é feito deles?