[VB.NET express 2005] - Regular expressions

[Movie Maniac®]

Hi

I'm writing a little app and I need some html parsing through regular
expressions.

I wrote this piexe of code

Private Function findImgTags(ByVal strHTML As String) As Object
dim MatchObj As Match = Regex.Match(strHTML, "<img[^>]*>",
RegexOptions.IgnoreCase)
return MatchObj
End Function

This should return an object containing all the img tags, unfortunately
returns only the first img :(

Plus, I need to parse the whole html and find retain only thos img that
contains the string 'edit', as for example:

<img src="myimage.gif" title="edit" border="0">

How can I manage to do this?

Thanks in advance

[Herfried K. Wagner [MVP]]

"Movie Maniac®"
<is*************************@PUSSAVIABRUTTOSPIDERh otmail.com> schrieb:

Private Function findImgTags(ByVal strHTML As String) As Object
dim MatchObj As Match = Regex.Match(strHTML, "<img[^>]*>",
RegexOptions.IgnoreCase)
return MatchObj
End Function

This should return an object containing all the img tags, unfortunately
returns only the first img :(

Use 'Regex.Matches' instead of 'Regex.Match'.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Movie Maniac®]

Herfried K. Wagner [MVP] ha scritto:

"Movie Maniac®"
<is*************************@PUSSAVIABRUTTOSPIDERh otmail.com> schrieb:

Private Function findImgTags(ByVal strHTML As String) As Object
dim MatchObj As Match = Regex.Match(strHTML, "<img[^>]*>",
RegexOptions.IgnoreCase)
return MatchObj
End Function

This should return an object containing all the img tags,
unfortunately returns only the first img :(

Use 'Regex.Matches' instead of 'Regex.Match'.

ok, this should return an array of matches, right?
So this solves the first question.

But, how can I retrieve only those img tag containing the 'edit' string?
I know this is more a matter of reg_exp, but hope someone can help :)

Thanks

[Homer J Simpson]

"Movie Maniac®"
<is*************************@PUSSAVIABRUTTOSPIDERh otmail.com> wrote in
message news:43**********************@reader1.news.tin.it. ..

But, how can I retrieve only those img tag containing the 'edit' string?
I know this is more a matter of reg_exp, but hope someone can help :)

Can you post a couple of lines?

[Movie Maniac®]

Homer J Simpson ha scritto:

"Movie Maniac®"
<is*************************@PUSSAVIABRUTTOSPIDERh otmail.com> wrote in
message news:43**********************@reader1.news.tin.it. ..

But, how can I retrieve only those img tag containing the 'edit' string?
I know this is more a matter of reg_exp, but hope someone can help :)

Can you post a couple of lines?

a couple of lines of what? Of VB code? of html code?

well, as for VB, here you go:

Private Function findImgTags(ByVal strHTML As String) As Object
'Returns the img tag we are searching
Dim Match = Regex.Matches(strHTML, "<img[^>]*>", RegexOptions.IgnoreCase)
Dim str As Object
Dim a As String
For Each str In Match
a = str.ToString()
If InStr(a, "edit", CompareMethod.Text) Then Return a
Next
Return False
End Function

while if you meant html code, well imagine an html page with a serie of
images, like this:

<img src="image1.gif" title="join">
<img src="image1.gif" title="leave">
<img src="image1.gif" title="add">
<img src="image1.gif" title="edit">
<img src="image1.gif" title="delete">

I would like to retrieve just the last one. As you can see, I retrieve
all the images, and then do a loop on the object to find the right one.
But I know I can avoid this with the proper regular expression.
The question is: how can I do?

Thanks a lot

[Homer J Simpson]

"Movie Maniac®"
<is*************************@PUSSAVIABRUTTOSPIDERh otmail.com> wrote in
message news:43**************@PUSSAVIABRUTTOSPIDERhotmail. com...

<img src="image1.gif" title="join">
<img src="image1.gif" title="leave">
<img src="image1.gif" title="add">
<img src="image1.gif" title="edit">
<img src="image1.gif" title="delete">

I would like to retrieve just the last one. As you can see, I retrieve all
the images, and then do a loop on the object to find the right one. But I
know I can avoid this with the proper regular expression.
The question is: how can I do?

To match

<img src="image1.gif" title="delete">

anywhere in the line you need something like

\<img src=[^>]* title=\"delete\"\>

Can't say this is exactly right but it should be close.