Join-File.ps1
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function Join-File { <# .SYNOPSIS Joins the parts created by Split-File and re-creates the original file .DESCRIPTION Use Split-File first to split a file into multiple part files with extension .part To join (recreate) the original file, specify the original file name (less the part number and the extension .part) .EXAMPLE Join-File -Path "C:\test.zip" Looks for the file c:\testzip.00.part and starts creating c:\test.zip from it. Once c:\test.zip.00.part is processed, it looks for more parts until no more parts are found. .EXAMPLE Join-File -Path "C:\test.zip" -DeletePartFiles Looks for the file c:\testzip.00.part and starts creating c:\test.zip from it. Once c:\test.zip.00.part is processed, it looks for more parts until no more parts are found. Once the original file c:\test.zip is recreated, all c:\test.zip.XXX.part files are deleted. #> param ( # specify the path name of the original file (less incrementing number and less extension .part) [Parameter(Mandatory,HelpMessage='Path of original file')] [String] $Path, # when specified, delete part files after file has been created [Switch] $DeletePartFiles ) try { # get the file parts $files = Get-ChildItem -Path "$Path.*.part" | # sort by part Sort-Object -Property { # get the part number which is the "extension" of the # file name without extension $baseName = [IO.Path]::GetFileNameWithoutExtension($_.Name) $part = [IO.Path]::GetExtension($baseName) if ($part -ne $null -and $part -ne '') { $part = $part.Substring(1) } [int]$part } # append part content to file $writer = [IO.File]::OpenWrite($Path) $files | ForEach-Object { Write-Verbose -Message "processing $_..." $bytes = [IO.File]::ReadAllBytes($_) $writer.Write($bytes, 0, $bytes.Length) } $writer.Close() if ($DeletePartFiles) { Write-Verbose -Message "Deleting part files..." $files | Remove-Item } } catch { throw "Unable to join part files: $_" } } |