Vista Tutorial - The next line in a text file

Hi!
I have an html file which has several instances of the same string
pattern "ABCDEF".

$a = Select-String -Path d:\work\test.html -pattern "ABCDEF"

and find the line number of the last instance of the pattern "ABCDEF"
by

$c = $a[$a.Length -1].ToString().Split(":")[2]

$c contains the line number.

How could I point to the next line number which is $c + 1 and retrieve
the string of the next line to a varible ?

Thanks in advance.

pjo


--
pjo
http://www.techtalkz.com - Technology and Computer Troubleshooting Forums

On Feb 17, 1:14 am, pjo <gu...@xxxxxx-email.com> wrote:If the line number is $c, then try this:

(get-content test.html)[$c]

If you only interested in the line after the last "ABCDEF" in file
test.html, try this:

get-content test.html | foreach { $prev = "" } { if ($prev -match
"ABCDEF") { $result = $_ }; $prev = $_ }

$result should hold the value that you want.

--
Kam-Hung Soh <a href="http://kamhungsoh.com/blog">Software Salariman</
a>

When retrieving a file's content, Get-Content returns a String object for each line in the file, if there is more than one line you get an array of String objects. When the number of elements expected is unknown --could be zero, one or more-- and you want to ensure an array, enclose the command in an array subexpression '@(...)'
Select-String returns MatchInfo objects or a Boolean value. You can retrieve just one property from the MatchInfo objects --in your case the LineNumber property-- and get an array of these values. The MatchInfo object's LineNumber values are origin-one, i.e. the first line of the file, this is important to remember because PowerShell's array is origin-zero.
If you get the LineNumber value of the last line that matched a pattern in the html file and would like to rerrieve the _same_ line from the array of Strings returned by Get-Content, you would have to subtract 1 from it to use it as the index. Since you want to retrieve the _next_ line just use the LineNumber value you get from Select-String as the index for the String object array.
PowerShell's array notation allows negative index, i.e. -1 is the last element, -2 the next to last and so on.

$htmlFile = 'd:\work\test.html'
$pattern = "ABCDEF"

# last match's line number
$c = @(select-string $pattern $htmlFile | % {$_.lineNumber})[-1]
# next line
@(gc $htmlFile)[$c]

# or...
@(gc $htmlFile)[@(select-string $pattern $htmlFile | % {$_.lineNumber})[-1]]

--
Kiron