Tirar porçao de codigo html de um ficheiro

zoep · March 9, 2009 at 10:02 AM

Bom Dia pessoal, eu tenho um ficheiro de texto com esta porção de código

<tbody><tr class="Laranja"><td class="titulotabela" width="20%" align="center">Indexante</td><td class="titulotabela" width="20%" align="center">Prazo</td><td class="titulotabela" width="18%" align="center">Data</td><td class="titulotabela" width="16%" align="center">Valor</td><td class="titulotabela" width="26%" align="center">Média do último mês</td></tr><tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">1 Semana</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,169%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">1 Mês</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,398%</font></td><td align="right"><font class="textotabela">1,628%</font></td></tr><tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">3 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,726%</font></td><td align="right"><font class="textotabela">1,943%</font></td></tr><tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">6 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,842%</font></td><td align="right"><font class="textotabela">2,034%</font></td></tr><tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">12 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,957%</font></td><td align="right"><font class="textotabela">2,135%</font></td></tr><tr class="Branco"><td><font class="textotabela">LIBOR</font></td><td><font class="textotabela">1 Mês</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,386%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">LIBOR</font></td><td><font class="textotabela">3 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,732%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">LIBOR</font></td><td><font class="textotabela">6 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,856%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">LIBOR</font></td><td><font class="textotabela">12 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,970%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">EONIA</font></td><td><font class="textotabela">-</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,261%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">TBA</font></td><td><font class="textotabela">-</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,856%</font></td><td align="right"><font class="textotabela">-</font></td></tr><tr class="Branco"><td><font class="textotabela">REFIRATE *</font></td><td><font class="textotabela">-</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,500%</font></td><td align="right"><font class="textotabela">-</font></td></tr></tbody>

Como é que eu ao carregar num button, faço para ele ir buscar só este bocado de codigo:

<tr class="Branco"><td><font class="textotabela">EURIBOR</font></td><td><font class="textotabela">12 Meses</font></td><td align="center"><font class="textotabela">06/03/2009</font></td><td align="right"><font class="textotabela">1,957%</font></td><td align="right"><font class="textotabela">2,135%</font></td></tr>

Obrigado pessoal!

zoep · March 9, 2009 at 11:40 AM

ng me consegue ajudar? ao menos digam que não conseguem sff :S

jpaulino · March 9, 2009 at 11:50 AM

Calma! O pessoal ajuda, quando pode 😛

Acho que já te disse isto antes, e não se se chegaste a tentar, mas podes usar o IndexOf() para verificares a posição e depois o Substring() para mostrares o que te interessa.

Mais ou menos isto:

     Dim str As String = «O teu código html»

        Dim posA As Integer = str.IndexOf("<tr class='Branco'>")
        Dim posB As Integer = str.IndexOf("</tr>", posA)
        Debug.WriteLine(str.Substring(posA, posB - posA))

zoep · March 9, 2009 at 11:58 AM

da-me erro na str.indexof()! Aparece Str com letras maiusculas e diz "Overload resolution failed because no accessible 'IndexOf' accepts this number of arguments"

jpaulino · March 9, 2009 at 12:06 PM

Mostra lá como tens!

zoep · March 9, 2009 at 12:16 PM

eu tenho estado a tentar fazer de outra maneira ! Por isso ainda nao cheguei lá :down:

Eu vou a uma pagina web, guardo o codigo-fonte da página num ficheiro txt, e depois qero navegar no ficheiro e tirar uma porção de codigo.

Já consigo navegar no ficheiro até ao fim (quando aparece /html)

Agora gostava que ele enquanto tivesse lá dentro, quando encontrasse aquela 2a tabela que eu disse, a guardasse na memoria

Para ler o ficheiro fiz assim

        'vai ler o ficheiro até ao fim, e a var iolines vai ficar com o ficheiro todo
        Dim sr As New StreamReader("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")
        Dim ioLine As String
        Dim ioLines As String
        ioLine = sr.ReadLine
        ioLines = ioLine
        While Not ioLine = "</html>"
            ioLine = sr.ReadLine
            ioLines = ioLines & vbCrLf & ioLine
        End While
        sr.Close()
        MsgBox(ioLines)

zoep · March 9, 2009 at 12:16 PM

scalhar tambem á uma maneira (assim como á de ele ler até...) de ele ler apartir de...

zoep · March 9, 2009 at 12:31 PM

e aproveitando o codigo que tenho acima gostava de fazer um if do tipo, se o ficheiro .txt estivesse vazio, ele mandava para uma txtbox a dizer que o ficheiro nao tem nada escrito!

jpaulino · March 9, 2009 at 12:55 PM

da-me erro na str.indexof()! Aparece Str com letras maiusculas e diz "Overload resolution failed because no accessible 'IndexOf' accepts this number of arguments"

Mas como te deu este erro ?

jpaulino · March 9, 2009 at 12:57 PM

O str faz assim:

Dim str As String = IO.File.ReadAllText("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")

zoep · March 9, 2009 at 01:07 PM

o erro persiste!

Argument not specified for parameter 'Number' of 'Public Function Str(Number As Object) As String'.

jpaulino · March 9, 2009 at 01:12 PM

o erro persiste!

Argument not specified for parameter 'Number' of 'Public Function Str(Number As Object) As String'.

Olha lá, como é que queres que alguém te ajude se tu so mostras uma linha de cada vez!

Mostra lá o que tens ...

zoep · March 9, 2009 at 02:02 PM

Imports System
Imports System.IO
Imports System.Collections


Public Class form1
    Private Sub BT_go_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BT_go.Click
        WebBrowser1.Navigate(TXT_url.Text) 'diz que o url do webbrowser vai ser o que o utilizador escreveu
    End Sub

    Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        Dim abc As String = WebBrowser1.DocumentText 'manda o codigo fonte para uma varial
        TXT_codhtml.Text = abc 'iguala uma txtbox invisivel á variavel abc que tem o codigo fonte




    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BT_guardarcod.Click
        'Grava sobre a informaçao do fixeiro
        Dim objStream As New System.IO.FileStream("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt", IO.FileMode.OpenOrCreate)
        Dim Arq As New System.IO.StreamWriter(objStream)


        Arq.WriteLine(WebBrowser1.DocumentText) 'guarda o que está na textbox num ficheiro de texto
        Arq.Close()
        MessageBox.Show("Codigo HTML guardado!")
    End Sub

    Private Sub BT_limpar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BT_limpar.Click
        'limpa a txtbox e o ficheiro txt
        Dim stream As New IO.StreamWriter("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt", False)
        stream.WriteLine("")
        TXT_pesquisar.Text = ""
        stream.Close()
        MessageBox.Show("Codigo HTML apagado!")


    End Sub

    Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        'vai ler o ficheiro até ao fim, e a var iolines vai ficar com o ficheiro todo
        Dim sr As String = IO.File.ReadAllText("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")
        Dim posA As Integer = Str.IndexOf("<tr class='Branco'>")
        Dim posB As Integer = Str.indexof()("</tr>", posA)




        'Dim ioLine As String
        'Dim ioLines As String
        'ioLine = sr.ReadLine
        'ioLines = ioLine
        'While Not ioLine = "</html>"
        '    ioLine = sr.ReadLine
        '    ioLines = ioLines & vbCrLf & ioLine
        'End While
        'sr.Close()
        'TXT_pesquisar.Text = ioLines






    End Sub
End Class

Hellblazer · March 9, 2009 at 02:11 PM

Dim path As String = "C:\teste.txt"
        System.IO.File.Delete(path)
        System.IO.File.Create(path)

jpaulino · March 9, 2009 at 02:14 PM

Dim sr As String = IO.File.ReadAllText("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")
Dim posA As Integer = Str.IndexOf("<tr class='Branco'>")
Dim posB As Integer = Str.indexof()("</tr>", posA)

Isto não está como eu coloquei .... é:

Dim str As String = IO.File.ReadAllText("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")

e depois:

Debug.WriteLine(str.Substring(posA, posB - posA))

zoep · March 9, 2009 at 02:14 PM

Hellblazer nao percebest muito bem qual é o intuito da coisa lol

Lê bem o topic...

O que eu quero é que o programa, no button1_click, "tire" um bocado do codigo, e o meta numa txtbox! O bocado que quero tirar já é default (por agora dps mudo isso)! Lê o primeiro topico que tá lá que porção quero tirar, e do que quero tirar !

zoep · March 9, 2009 at 02:18 PM

Depois de meter tudo bem, e correr o programa da-me este erro:"O índice estava fora do intervalo. Tem de ser não negativo e inferior ao tamanho da colecção. Nome do parâmetro: startIndex"

codigo:

        'vai ler o ficheiro até ao fim, e a var iolines vai ficar com o ficheiro todo
        Dim str As String = IO.File.ReadAllText("C:\Documents and Settings\BRUNO_2\Ambiente de trabalho\Estágio\projecto\teste.txt")
        Dim posA As Integer = str.IndexOf("<tr class='Branco'>")
        Dim posB As Integer = str.IndexOf("</tr>", posA)

        Debug.WriteLine(str.Substring(posA, posB - posA))

O Erro é no 2o str.indexof

jpaulino · March 9, 2009 at 02:20 PM

Deve ser porque o posA = -1 (ou seja não encontrou nada).

Não consegues mostrar (anexar) o ficheiro txt ?

zoep · March 9, 2009 at 02:22 PM

consigo.


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<tr><td height="15" class="textodestaque"><b>Cota��es</b><br><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20Imagens%20Comuns%20Sites%20-%20Comuns&content=Img_Border_Header" border="0"></td></tr>		
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<tr><td height="15" class="textodestaque"><b>Informa��o Financeira</b><br><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20Imagens%20Comuns%20Sites%20-%20Comuns&content=Img_Border_Header" border="0"></td></tr>		
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<tr><td class="menu_tits" height="15">DMIF<br/><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20Imagens%20Comuns%20Sites%20-%20Comuns&content=Img_Border_Header" border="0"/></td></tr>
<tr><td><a class="menu_items" href="/Mercados/DMIF.asp">O que �?</a></td></tr>
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	<td valign="top" width="610"><font class="historico"><a href="http://www.bancobpi.pt" class="link">P�gina Inicial</a> > </font><font class="historico_selected">Investimento</font>
	<br>

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				<td><a href="/pagina.asp?s=1&a=2&p=5&f=2370&opt=f"><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20BPI%20Investimentos%20-%20Destaques%20e%20Banners&content=Banner_DP" border="0"></a></td>
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				<td valign="top" width="50%">					
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							<td valign="top"><a href="/pagina.asp?s=1&a=6&f=2872&opt=f"><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20BPI%20Investimentos%20-%20Destaques%20e%20Banners&content=Dest_PlanosPoupanca" border="0" WIDTH="64" HEIGHT="64"></a></td>
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									<tr><td valign="top"><a class="link_indice" href="/pagina.asp?s=1&a=6&f=2872&opt=f"><font class="menu_items">Planos Poupan�a</font></a></td></tr>
									<tr height="10"><td></td></tr>
									<tr><td><font class="FontCinza1">Fa�a um plano de entregas peri�dicas flex�vel, no qual pode definir o montante, o prazo e o produto.</font></td></tr>
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							</td>
						</tr>							
						<tr height="10"><td colspan="3"></td></tr> 	
						<tr>
							<td valign="top"><a href="/Simuladores/SimuladorPPREPensoes.asp?sim=Reforma"><img src="/RepMultimedia/getMultimedia.asp?channel=Multimedia%20-%20BPI%20Investimentos%20-%20Destaques%20e%20Banners&content=destaque%20reforma" border="0" WIDTH="64" HEIGHT="64"></a></td>
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									<tr><td valign="top"><a class="link_indice" href="/Simuladores/SimuladorPPREPensoes.asp?sim=Reforma"><font class="menu_items">Como vai ser a sua Reforma?</font></a></td></tr>
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									<tr><td><font class="FontCinza1">Simule e descubra. O BPI tem � sua disposi��o um simulador de Reforma que calcula o valor da sua Pens�o.</font></td></tr>
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					<font class="FontBoldLaranja2">Novidades BPI</font>
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<p>
<a class="menu_items" href="noticia.asp?id=CB1284FA-D068-4D79-B8DD-5161F004050B&cod=2529">Research - Angola </a><br />
<font class="FontCinza0">2009-03-05</font><br />
<font class="FontCinza1"> J� se encontra dispon�vel o relat�rio "Angola" do m�s de Mar�o 2009 </font>
</p>
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<tr>
<td><img src="images/1x1_trans.gif" width="1" height="10" /></td>
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<td>
<p>
<a class="menu_items" href="noticia.asp?id=937A3B52-B34A-4CAE-9179-ECBA05F608FF&cod=1761">Mercados Financeiros Mar�o 2009</a><br />
<font class="FontCinza0">2009-03-04</font><br />
<font class="FontCinza1"> J� se encontra dispon�vel o relat�rio "Mercados Financeiros" de Mar�o 2009 </font>
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							<td class="FontAzul1" valign="center" align="left"> <b>Evolu��o Unidade Participa��o</b></td>
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						<!--tr>								<td class="FontBoldAzul1" height="20" valign="center" align="left">																	</td>							</tr-->
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								<form method='POST' action='index.asp' id='ff1' name='ff1'><select class='FontCinza1' name='bSelect' id='bSelect' onChange='document.ff1.submit();'><option value='877'>BPI Reforma Ac��es PPR</option><option value='890'>BPI Global</option><option value='812'>BPI Universal</option><option value='807'>BPI Brasil</option><option value='861'>BPI Liquidez</option><option value='298'>BPI Tesouraria</option><option value='803'>BPI Taxa Vari�vel</option><option value='895'>BPI Euro Taxa Fixa</option><option value='859'>BPI Ob. Alto Rend. Alto Risco</option><option value='865'>BPI Portugal</option><option value='851'>BPI Europa Valor</option><option value='899'>BPI Europa Crescimento</option><option value='849'>BPI Am�rica</option><option value='809'>BPI Tecnologias</option><option value='838'>BPI Reestrutura��es</option><option value='197'>BPI Reforma Segura - PPR</option><option value='869'>BPI Ref. Investimento - PPR</option><option value='870'>BPI Vida PPR</option><option value='897'>BPI Poupan�a Ac��es - PPA</option><option value='842'>BPI Vida Universal (Ac��es)</option><option value='844'>BPI Vida Taxa Fixa</option><option value='848'>BPI Vida Taxa Vari�vel</option><option value='813'>BPI Selec��o</option></select></form>
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								<font class="FontAzul1"><b>Produtos Estruturados</b></font>
							</td>
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							<td height="20"><font class="FontAzul1">Maiores subidas no �ltimo m�s</font></td>
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						<tr class="Azul"> 
							<td>
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										<td align="center" width="6%" class="FontBranco2">Produto</td>
										<td align="center" width="4%" class="FontBranco2"> Cot(%)</td>
										<td align="center" width="6%" class="FontBranco2">Var. </td>
									</tr>

									<tr class="Branco"> 
										<td class="FontAzul1" width="12%">BPI Gold USD 115% 2007-2012</td>
										<td class="FontAzul1" width="5%" align="right"> 109,19</td>
										<td class="FontAzul1" width="5%" align="right"> 2,55%</td>
									</tr>

									<tr class="Branco"> 
										<td class="FontAzul1" width="12%">BPI Vasco da Gama 2008-2013</td>
										<td class="FontAzul1" width="5%" align="right"> 89,41</td>
										<td class="FontAzul1" width="5%" align="right"> 2,17%</td>
									</tr>

									<tr class="Branco"> 
										<td class="FontAzul1" width="12%">BPI D�lar Euro 2008-2011</td>
										<td class="FontAzul1" width="5%" align="right"> 112,38</td>
										<td class="FontAzul1" width="5%" align="right"> 1,55%</td>
									</tr>

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<tr><td height="20" colspan="5"></td></tr>
<tr>
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<tr>
	<td align="center" width="35%"><img src="images/1x1_trans.gif" height="10"></td>
	<td align="center" class="FontAzul1"><a class="link_azul" target="_blank" href="http://www.bpinet.pt">BPI Net</a></td>
	<td align="center" class="FontAzul1">|</td>
	<td align="center" class="FontAzul1"><a class="link_azul" target="_blank" href="http://www.bpionline.pt">BPI Online</a></td>
	<!--td align="center" class="FontAzul1">|</td>
	<td align="center" class="FontAzul1"><a class="link_azul" target="_blank" href="http://www.bancobpi.pt">Banco BPI</a></td-->
	<td align="center" class="FontAzul1">|</td>
	<td align="center" class="FontAzul1"><a class="link_azul" target="_blank" href="http://www.bancobpi.pt/pagina.asp?s=1&a=5&f=1243&opt=f">Balc�es BPI</a></td>
	<td align="center" width="35%"><img src="images/1x1_trans.gif" height="10"></td>
</tr>
</table>
<table border="0" width="100%" height="15" cellspacing="0" cellpadding="0">
<tr>
	<td align="center" class="FontCinza0">Banco BPI � 2009</td>
</tr>
<tr>
	<td align="center" class="FontCinza0">O Banco BPI encontra-se registado na <a class="link_azul" target="_blank" href="http://www.cmvm.pt/">CMVM</a><br>Site optimizado para IE vers�o 6.x ou superior Resolu��o 800 x 600</td>
</tr>
</table></td>
</tr>
</table>
</body>
</html>

<!--P2-->

é uma página html!

zoep · March 9, 2009 at 02:22 PM

e até adianto mais:

http://www.bpiinvestimentos.pt/Mercados/QuadroCotacoesIndexantes.asp esta é a página, e eu quero tirar a parte dos dados da Euribor 12 meses!

Tirar porçao de codigo html de um ficheiro

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