Update Rename-PDFByContent.ps1

Rename-PDFByContent.ps1

+function Get-UIDFromPdf
+{
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true)]
+        [string]
+        $Path
+    )
+
+    $Path = $PSCmdlet.GetUnresolvedProviderPathFromPSPath($Path)
+
+    $reader = New-Object iTextSharp.text.pdf.pdfreader -ArgumentList $Path
+
+    $lines = [iTextSharp.text.pdf.parser.PdfTextExtractor]::GetTextFromPage($reader, 1) -split "\r?\n"
+
+    $output = ($lines | Where-Object { $_ -like 'CC Student Id:*' }).Replace('CC Student Id:','').Trim()
+
+    $reader.Close()
+
+    return $output
+}
+
+Unblock-File -Path C:\Scripts\itextsharp\iTextSharp.dll
+Add-Type -Path C:\Scripts\itextsharp\itextsharp.dll
+
+$files = Get-ChildItem -Filter '*.pdf' -File
+
+$files | ForEach-Object {
+
+    $uid = Get-UIDFromPdf -Path $_.FullName
+
+    if($uid.Length -eq 7){
+
+        $_ | Rename-Item -NewName "$uid.pdf"
+
+    }
+
+}
\ No newline at end of file