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

While you parse error*.txt file, you can save last seen date in a variable. So, when you encounter Error-* record, you will know to what date it related to.

$Today=[datetime]::Today
Get-Content D:\Script\system.txt|
ForEach-Object {
    $System=$_
    Get-ChildItem -Path "filesystem::\\$System\D$\Error" -Filter error*.txt|
    # filesystem:: allows code to work, even if current provider is not a filesystem provider.
    Where-Object {$_.LastWriteTime.Date-eq$Today}|
    ForEach-Object {
        Get-Content -LiteralPath $_.PSPath|
        ForEach-Object {
            $ParseDate=New-Object datetime
            $LastSeenDate=$null
        } {
            if([datetime]::TryParseExact($_,'ffffd MMM dd HH:mm:ss yyyy',[cultureinfo]::InvariantCulture,'None',[ref]$ParseDate)){
                $LastSeenDate=$ParseDate
            }
            if($_.StartsWith('Error-')){
                [PSCustomObject]@{
                    Error=$_
                    Date=$LastSeenDate
                    System=$System
                }
            }
        }
    }
}|
Where-Object {$_.Date.Date-eq$Today}