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marksfo
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Joined Dec 03, 2020
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C# Pipeline.Invoke() not returning powershell collection
On Windows 10, in C# I am trying to call a powershell script via Pipeline.Invoke() to retrieve all the disks on a network server, for each server on a network. But can't get it to return the data to C# when there are multiple disks on a server. I have the following C# code: ``` foreach (var server in _collServers) { Pipeline pipeline2 = runspace.CreatePipeline(); pipeline2 = runspace.CreatePipeline(); scriptCommand = new Command(@"C:\DEV\Monitor\Monitor\bin\scripts\GetDisks.ps1"); pipeline2.Commands.Add(scriptCommand); var collDisks = pipeline2.Invoke(); foreach (var item in collDisks) { var s = item.ToString(); } } ``` which executes the following powershell script (GetDisks.ps1), with ComputerName hardcoded to a specific server for now: ``` $disks = Get-CimInstance -ClassName CIM_LogicalDisk -ComputerName SERVER01 | Where-Object { ($_.DeviceID -ge 'C') -and ($_.DriveType -eq 3)} | Select-Object DeviceID, VolumeName, Size, Freespace $disksout = [System.Collections.Generic.List[PSObject]]::New() ForEach($d in $disks) { $disk = [PSObject] @{ 'DeviceID' = $d.DeviceID 'VolumeName' = $d.VolumeName 'Size' = $d.Size 'Freespace' = $d.Freespace } $disksout.Add($disk) } $disksout ``` but it doesnt return a PSObjects collection into collDisks. It works in the ISE (and every re-arrangement I try seems to work there). It works if I run it for my local machine by removing -ComputerName SERVER01 ``` $disks = Get-CimInstance -ClassName CIM_LogicalDisk | Where-Object { ($_.DeviceID -ge 'C') -and ($_.DriveType -eq 3)} | Select-Object DeviceID, VolumeName, Size, Freespace ``` It doesnt make any difference if I try using PSCustomObject instead, or creating the object collection different ways. I suspected its a type conversion issue, but using GetType() in various locations havent found the issue. Would appreciate if anyone else can cast light on the problem.
