powershell : pipe get-content to ps1 file with parameters - powershell

Question

I'm trying to write a script which uses the powershell cmdlet get-content tail and inserts the new lines into the sql server table. i can't get the syntax to pipe the tail to the sqlinsert.ps1 file that handles the table insert.
i'm looking for help on how to pipe "get-content tail" to a sqlinsert.ps1 file to do a sql database insert statement using the following :
$startTime = get-date
Write-Host "\\iisserver\logs\Logs-$("{0:yyyyMMdd}" -f (get-date)).txt"
get-content "\\iisserver\logs\Logs-$("{0:yyyyMMdd}" -f (get-date)).txt" -tail 1 -wait | & "sqlinsert.ps1" -stmp $("{0:yyyy-MM-dd hh:mm:ss.fff}" -f (get-date)) -method "Error" -msg $_
# % { "$_ read at $(Get-Date -Format "hh:mm:ss")" }
in the sqlinsert.ps1 :
param ([string]$stmp, [string]$method, [string]$msg )
$Connection = New-Object System.Data.SQLClient.SQLConnection
$Connection.ConnectionString = "server='$serverName';database='$databaseName';User ID = $uid; Password = $pwd;"
$Command = New-Object System.Data.SQLClient.SQLCommand
$Command.Connection = $Connection
$sql = "insert into [tbl_iiserrors] (errstamp, method, msg) values (#stmp , #method, #msg) "
.
.
.
error i get:
& : The term 'sqlinsert.ps1' is not recognized as the name of a
cmdlet, function, script file, or operable program. Check the spelling
of the name, or if a path was included, verify that the path is
correct and try again. At C:\Temp\ob\iislog\tst_tail.ps1:3 char:95
... Mdd}" -f (get-date)).txt" -tail 1 -wait | & "sqlinsert.ps1" -stmp $ ...
~~~~~~~~~~~~~~~
CategoryInfo : ObjectNotFound: (sqlinsert.ps1:String) [], CommandNotFoundException
FullyQualifiedErrorId : CommandNotFoundException
Suggestion [3,General]: The command sqlinsert.ps1 was not found, but
does exist in the current location. Windows PowerShell does not load
commands from the current location by default. If you trust this
command, instead type: ".\sqlinsert.ps1". See "get-help
about_Command_Precedence" for more details.
The sqlinsert.ps1 works when i run it from powershell command :
PS c:\temp> .\sqlinsert -stmp 2020-11-20 00:00:00 -method 'eek' -msg 'uh hello'

Answer 1

In order to bind pipeline input to a parameter, you need to decorate it with a [Parameter] attribute and specify that it accepts pipeline input, like this:
param (
[string]$stmp,
[string]$method,
[Parameter(ValueFromPipeline = $true)]
[string]$msg
)
See the about_Functions_Advanced_Parameters help file for more details about how to modify the behavior of parameters

Answer 2

By design, for security reasons, PowerShell requires you to signal the intent to execute a script located in the current directory explicitly, using a path - .\sqlinsert.ps1 - rather than a mere file name - sqlinsert.ps1; that is what the suggestion following the error message is trying to tell you.
Note that you only need &, the call operator, if the script path is quoted and/or contains variable references - and .\sqlinsert.ps1 doesn't require quoting.
You can only use the automatic $_ variable, which represents the current input object from the pipeline inside a script block ({ ... }), such as one passed to the ForEach-Object cmdlet, which invokes that block for each object received via the pipeline.
Re the content of your script: Inside expandable strings ("..."), you cannot use # to refer to variables to be expanded (interpolated); use regular, $-prefixed variable references or $(...), the subexpression operator to embed expressions; also, it looks like you're inserting string values into the SQL table, so you'll have to enclose the expanded variable values in embedded '...'
$startTime = get-date
Get-Content "\\iisserver\logs\Logs-$("{0:yyyyMMdd}" -f (get-date)).txt" -Tail 1 -Wait |
ForEach-Object {
.\sqlinsert.ps1 -stmp ("{0:yyyy-MM-dd hh:mm:ss.fff}" -f (get-date)) -method "Error" -msg $_
}
The alternative to using a ForEach-Object call is to modify your script to directly receive its -msg argument from the pipeline, as shown in Mathias' answer, in which case you must omit the -msg $_ argument from your script call:
Get-Content ... |
.\sqlinsert.ps1 -stmp ("{0:yyyy-MM-dd hh:mm:ss.fff}" -f (get-date)) -method "Error"