param (
[parameter(mandatory = $true, ValueFromPipelineByPropertyName = $true)][AllowEmptyString()][string]$Sender,
[parameter(mandatory = $true, ValueFromPipelineByPropertyName = $true)][AllowEmptyString()][string]$FileDate,
[parameter(mandatory = $true, ValueFromPipelineByPropertyName = $true)][AllowEmptyString()][string]$RecordType
)

# Check for at least one parameter selected
if ($Sender -eq ""...

I really appreciate all of your help and suggestions, and code...  I'll see if I can take your snippets and code samples

to try and see if I can get a...

Is there anything you can run to determine types of files your processing?

I was using:

$fileData = [System.Text.Encoding]::UTF8.GetString($bytes);

What would the code look like that follows the rules outlined above that looks at specific positions within the data record. I checked the records and for Inbound ISA records...

Would this make the script any easier for lookups and speed.

Seems like there are 2 different formats the records could use for Inbound(which I would already know because of the...

I outputted these values:

# Validate this is an EDI file

$fileData.Substring(0,3)

ISA

# Get the data element separator and segment element separator

$dataElement = $fileData.Substring(3,1);

*

$segmentElement = $fileData.Substring(105,1);

{

It seems the record start at zero(0) based...

I put output for filenames and found that the delimiter switched from * to a bar(|) delimiter.  Is there a way to dynamically

figure out delimiter?

Thanks for suggestions..

Thanks for update to script...

I started it and got a message:

You cannot call a method on a null-valued expression

Error came from:

if (($firstRow[6].Trim() -eq $Sender -or $Sender -eq "") -and ($firstRow[9]...

Thanks for replies... I'll test that code out..

Do you anticipate with 1000's of files to search this lookup to be slow?

Thanks.

Could you inject that into the code so I can see how that may work, do I still you default values in script?

Thanks for response..

If I set a default value that maybe not the date I'm searching for that sender or the RecordType.

or if I search for Date it maybe not the sender(if I...

When I call with just sender parn

You cannot call a method on a null-valued expression.

At C:\PowerShell\edi_archive_lookup.ps1:8 char:1

+ $strFileDate = $FileDate.ToString("yyMMdd");

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : InvalidOperation: (:) [], RuntimeException

+ FullyQualifiedErrorId : InvokeMethodOnNull

param (
[parameter(mandatory = $false, ValueFromPipelineByPropertyName = $true)][string]$sender,
[parameter(mandatory = $false, ValueFromPipelineByPropertyName = $true)][datetime]$fileDate,
[parameter(mandatory = $false, ValueFromPipelineByPropertyName = $true)][string]$RecordType
)

# Convert input date to string YYMMDD
$strFileDate = $FileDate.ToString("yyMMdd");

# Get list...

Would a record up to character 106 work?