Access Pipeline Variable Attributes That Have invalid variable names - powershell

Question

I am writing a powershell advanced function that will take input from the pipeline. More specifically, I will be piping in from import-csv. The problem is the column headers to the csv file I am using uses syntax invalid to ps. Here is what my code is like
function my-function{
[CmdletBinding()]
params
(
[Parameter(Mandatory=$false,ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true)]
[string]$Id = $_.ID,
[(Parameter(Mandatory=$false,ValueFromPipeline=$true,
ValueFromPipelineByPropertyName=$true)]
[string]$IdRaw = $_."ID(RAW)",
)
BEGIN{
#Sets up a db connection
}
PROCESS{
#Builds an insert query with csv members
}
END{
#closes db connection
}
}
ID,ID(RAW),Date Time,Date Time(RAW),Type,Type(RAW)
29874,29874,4/18/2012 23:58,41018.20753, Servername, ServernameRaw
When I execute this with my csv input, the value of $Id becomes 2905, while the $IdRaw variable takes on a string representation of the entire $_ hashtable. Just to elaborate any paramter with a valid name {URL, ID, Status} all work. Any that contain a space or (RAW) receive the entire $_ variable.
-Patrick

Answer 1

#Edit to include updated code
$x=import-csv c:\temp\testinput.csv
function my-function{
[CmdletBinding()]
param
(
[Parameter(Mandatory=$false,ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)][string]$Id,
[Parameter(Mandatory=$false,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true)]
[alias("ID(RAW)")][string]$IdRaw
)
begin{
#Sets up a db connection
Write-Debug "Starting"
}
process {
#Builds an insert query with csv members
write-debug "IDRaw=$IDRaw"
}
end {
#closes db connection
Write-Debug "Ending"
}
}
$x | my-function
sample file contents
ID,ID(RAW),Date Time,Date Time(RAW),Type,Type(RAW)
29874,29877,4/18/2012 23:58,41018.20753, Servername1, ServernameRaw1
29875,29878,4/19/2012 23:58,41018.20753, Servername2, ServernameRaw2
29876,29879,4/20/2012 23:58,41018.20753, Servername3, ServernameRaw3