Use PowerShell to Parse IIS Logs for String

parse-iislogfiles.ps1

$logPath = "C:\inetpub\logs\LogFiles\W3SVC1\"
$logFiles = [System.IO.Directory]::GetFiles($logPath, "*.log")

# $logs will store each line of the log files in an array
$logs = @()

# Skip the comment lines
$logFiles | % { Get-Content $_ | where {$_ -notLike "#[D,F,S,V]*" } | % { $logs += $_ } }

# Example search for HTTP 500 
$logs | Select-String -Pattern '500'