specific text of today's date from txt file by powershell

Question

I have a text file. Similar to this.

This is a sample data.
This is a sample data.
This is a sample data.
Sat Jun 06 08:17:01 2015
WARNING: Cannot delete file.
E         


        

Answer 1

I got pinged to the question, so here's my take on a solution:

#Create test file from posted data:
(@'
This is a sample data.
This is a sample data.
This is a sample data.
Sat Jun 06 08:17:01 2015
WARNING: Cannot delete file.
Error-101
Error-100
Error-102
This is a sample data.
This is a sample data.
Error-10666
This is a sample data.
Sat Jun 06 10:17:01 2015
File deleted.
This is a sample data.
This is a sample data.
Sat Jun 06 10:17:01 2015
File deleted.
Sat Jun 06 11:17:01 2015
WARNING: Cannot delete file.
Error-101
This is a sample data.
Sat Jun 06 18:17:01 2015
WARNING: Cannot delete file.
Error-101
This is a sample data.
'@).split("`n") |
#where { -notmatch '^#'} |
foreach {$_.trim()} |sc testfile.txt

#Proxy function for testing
function get-date {[datetime]'06/06/2015 18:17:01'} 

#Actual solution code follows:

$DateSearch = (get-date).ToString('MMM dd [0-9:]+ yyyy(.+)')
$DateSearch = '(?ms)' + $DateSearch

if ((Get-Content testfile.txt -Raw) -match  $DateSearch)
{ $Matches[1].Split("`n") -like 'Error*' }

#remove the proxy function:
 remove-item function:get-date

Error-101
Error-100
Error-102
Error-10666
Error-101
Error-101

This uses the [datetime] tostring() method to help create a regex to search for today's date in the file. Then it captures everything from that point to the end of the file, splits it at the newlines and filters out everything except the Error records.

Ignore that proxy function for get-date. That's just there to get the script to work with the test data.