Running Powershell script with if condition from a .NET app

Question

I have a .net application that successfully runs Powershell commands that it pulls from text files- until I tried doing one that is more complicated and contains an if condition. The script works correctly from a PS console but in .NET I only know how to pass in a string for the script, which after reading the file, it adds extra stuff like vblf and even if I take it out, it won't work. Is this even possible?

.NET Runtime Error: Server was unable to process request. ---> The term 'False' 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.

.NET code:

'Grab Powershell script from text (.ps1) file
strScript = File.ReadAllText(ScriptFileName)

'inject the arguments into the script
strScript = InsertArguments(strScript, Arguments)

'Open the runspace and create a pipeline if it's not already open
If psRunspace.RunspaceStateInfo.State = RunspaceState.BeforeOpen Then
  psRunspace.Open()
End If

Dim MyPipeline As Pipeline = psRunspace.CreatePipeline()
MyPipeline.Commands.AddScript(strScript)
Dim psResults As Collection(Of PSObject) = MyPipeline.Invoke()

Powershell Script, stored in ps1 file:

new-mailbox -name $argument1 -DisplayName $argument1 -UserPrincipalName $argument2 Room -DomainController $argument5
if ($argument4 -eq "False") {
   Set-CalendarProcessing $argument1 -BookingWindowInDays 400 -DeleteSubject $false -AutomateProcessing autoaccept -AllBookInPolicy $false -BookInPolicy $argument3 -DomainController $argument5        
} else {
   Set-CalendarProcessing $argument1 -BookingWindowInDays 400 -DeleteSubject $false -AutomateProcessing autoaccept -AllBookInPolicy $true -DomainController $argument5
}

When this script is read in, here is a substring of what gets pulled into strScript:

-Room -DomainController mcexdct1" & vbLf & "if (False -eq "False") {"

Can you post the error you are getting while you are trying this? — RinoTom
– RinoTom, Commented Feb 27, 2013 at 17:35
I updated the original post with the error and then when I looked at what was in strScript, I realized that my if condition is the real problem. I temporarily changed it to say if (5 -eq 5) and then everything worked- no error and the new mailbox was created in full. So I just need to figure out how to rewrite that syntax — Kelly
– Kelly, Commented Feb 27, 2013 at 20:03
I suspect the problem is in InsertArguments, which cuts part of the script as a result of its work, in some cases. — Victor Zakharov
– Victor Zakharov, Commented Feb 27, 2013 at 20:29

Kelly · Accepted Answer · 2013-02-28 18:29:30Z

3

Fixed it by changing the PowerShell script from this:

if ($argument4 -eq "False") {

to this:

if ("$argument4" -eq "False") {

It works with quotation marks around it. I guess the "junk" I was seeing in the script string (like vblf) is normal- I don't work with reading from text files that much.

answered Feb 28, 2013 at 18:29

Kelly

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