Ler ficheiro para listbox

[d.pereira]

Olá

Eu gostaria de saber, quando a listbox lê-se um arquivo de texto eu queria que fosse automaticamente, em vez de meter um botão e abri-lo pelo open file, entenderam?

[acao]

boas

se percebi não queres clicar no botão,

sugestão:

colocas o cod no evento load do form. «ao abrir carrega o ficheiro»

cumps

acao

[d.pereira]

Muito obrigada 🙂 . Mas também gostava de saber se era possível se o arquivo .txt abri-se automaticamente na listbox, se me poderem responder agradecia é que estou num trabalho de estágio.

Os meus melhores cumprimentos,

Diogo

[acao]

boas

foi isso que eu sugeri

colocas o cod no evento load do form e mostras o texto no listbox.

cumps

acao

[d.pereira]

Sim, eu percebi mas queria que aparecesse sem o openfile. Seria possível isso?

Queres que meta aqui o código, para ser mais rápido?

Cumps

Diogo

[acao]

boas

tens que usar sempre código para carrega-lo, não dá directamente nas propriedades.

podes usar a função freefile, mas vai dar mais ou menos a mesma coisa, o ficheiro tem que ser aberto.

tens aqui um exemplo do macoratti.

http://www.macoratti.net/arq_fun.htm

e tens aqui outro com o open file.

http://www.macoratti.net/vbn_atd1.htm

cumps

acao

Edited June 14, 2012 by acao

[d.pereira]

Imports Impress.My.Resources
Public Class Form1

Option Explicit
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Copyright ©1996-2011 VBnet/Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Distribution: You can freely use this code in your own
' applications, but you may not reproduce
' or publish this code on any web site,
' online service, or distribute as source
' on any media without express permission.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Private Const PRINTER_ATTRIBUTE_SHARED As Long = &H8
Private Const PRINTER_ATTRIBUTE_LOCAL As Long = &H40
Private Const PRINTER_ATTRIBUTE_NETWORK = &H10
Private Const PRINTER_LEVEL2 As Long = &H2

Private Const STANDARD_RIGHTS_REQUIRED As Long = &HF0000
Private Const PRINTER_ACCESS_ADMINISTER As Long = &H4
Private Const PRINTER_ACCESS_USE As Long = &H8
Private Const PRINTER_ALL_ACCESS As Long = (STANDARD_RIGHTS_REQUIRED Or _
PRINTER_ACCESS_ADMINISTER Or _
PRINTER_ACCESS_USE)

Private Structure PRINTER_DEFAULTS
pDatatype As String
pDevMode As Long 'DEVMODE
DesiredAccess As Long
End Structure

Private Structure PRINTER_INFO_2
Dim pServerName As String
Dim pPrinterName As String
Dim pShareName As String
Dim pPortName As String
Dim pDriverName As String
Dim pComment As String
Dim pLocation As String
Dim pDevMode As Long 'DEVMODE
Dim pSepFile As String
Dim pPrintProcessor As String
Dim pDatatype As String
Dim pParameters As String
Dim pSecurityDescriptor As Long 'SECURITY_DESCRIPTOR
Dim Attributes As Long
Dim Priority As Long
Dim DefaultPriority As Long
Dim StartTime As Long
Dim UntilTime As Long
Dim Status As Long
Dim cJobs As Long
Dim AveragePPM As Long
End Structure

Private Declare Function AddPrinter Lib "winspool.drv" _
Alias "AddPrinterA" _
(ByVal pServerName As String, _
ByVal Level As Long, _
ByVal pPrinter As Long) As Long

Private Declare Function OpenPrinter Lib "winspool.drv" _
Alias "OpenPrinterA" _
(ByVal pPrinterName As String, _
ByVal phPrinter As Long, _
ByVal pDefault As Long) As Long

Private Declare Function DeletePrinter Lib "winspool.drv" _
(ByVal hPrinter As Long) As Long

Private Declare Function ClosePrinter Lib "winspool.drv" _
(ByVal hPrinter As Long) As Long



Private Sub Form_Load()

Command1.Caption = "Add Printer"
Command2.Caption = "Delete Printer"
Label1.Caption = ""

End Sub

Private Sub Command1_Click()

Dim hPrinter As Long
Dim sServer As String
Dim pi2 As PRINTER_INFO_2

With pi2

'local machine
.pServerName = vbNullString

'display name for new printer
.pPrinterName = "vbnet test printer"

'name for share - must be upper-case
.pShareName = "HPLJ601"

'printer port (NT or later can
'have multiple separated with
'commas, e.g. "LPT1:,LPT2:")
.pPortName = "LPT1:"

'the name of an existing driver
.pDriverName = "HP LaserJet 5Si MX"

'a comment, if desired
.pComment = "Test printer - can delete"

'the location, if desired
.pLocation = "Bldg 7, Room 1321, NW601"

'the print processor name - manditory
.pPrintProcessor = "WinPrint"

'type of data supported, e.g. RAW or EMF
'this must match type used by the driver
'- manditory
.pDatatype = "RAW"

'flags - local printer, with share created
.Attributes = PRINTER_ATTRIBUTE_LOCAL Or _
PRINTER_ATTRIBUTE_SHARED

End With

'install on the local machine by passing
'vbNullString as the server name. If
'installation on another machine is
'to be made, pass the machine name
'in the usual 'server name format',
'eg: sServer = "\\laptopxp"
sServer = vbNullString

hPrinter = AddPrinter(sServer, PRINTER_LEVEL2, pi2)

Debug.Print(hPrinter, Err.LastDllError)

If hPrinter <> 0 Then

Label1.Caption = "Printer added successfully"
ClosePrinter(hPrinter)

End If

End Sub


Private Sub Command2_Click()

Dim hPrinter As Long
Dim sPrinterName As String
Dim pd As PRINTER_DEFAULTS

'we're deleting the just-added local printer,
'so specify the same printer name as used
'for pi2.pPrinterName during AddPrinter
sPrinterName = "vbnet test printer"

'if the printer to be deleted is on another
'machine, the machine and printer are passed
'together as sPrinterName in the format
'\\computername\printername, e.g.
' sPrinterName = sServer & "\" & sPrinterName
'or for our demo,
' sPrinterName = "\\laptopxp\vbnet test printer"

'set up a printer_defaults structure
With pd
'no devmode, so UDT member is
'declared Long and a null is passed
.pDevMode = 0&

'must be datatype of printer driver
'as set in AddPrinter
.pDatatype = "RAW"

'this is the access level for delete
.DesiredAccess = PRINTER_ALL_ACCESS
End With

If OpenPrinter(sPrinterName, hPrinter, pd) <> 0 Then

If hPrinter <> 0 Then

If DeletePrinter(hPrinter) <> 0 Then
Label1.Caption = "Printer deleted"
End If 'DeletePrinter

End If 'hPrinter

ClosePrinter(hPrinter)

End If 'OpenPrinter

Debug.Print(hPrinter, Err.LastDllError)

End Sub
End Class

Boas,

Eu estou a tentar instalar e adicionar impressoras ao programa e a minha dúvida é a seguinte : Eu meto este código no form e acrescentei a label só que me dá errado. Será que alguém me poderia ajudar?

Agradecia

Os meus melhores comprimentos,

Diogo

[acao]

boas

Diogo eu não te consigo ajudar, mas como o assunto parece diferente, ou aguardas que mais alguém se pronuncie, nomedamente o JPaulino que povavelmente passará por aqui, ou abre noutro tópico, se for net ou vb6 existe local próprio neste forum.

cumps

acao

[d.pereira]

Boas,

Obrigado pelo ajuda que me deste já foi muito. 🙂

Os meus melhores comprimentos,

D. Pereira