Powershell中的C＃管道（|）等价于Add-Type导入函数？

Question

I want to call a C# function in PowerShell, but with arguments containing pipes. I can call it this way in C# SomeCSharpFunction( THING | OTHERTHING, ARG2, ARG3) , but I can't find a way to do the same thing once I imported the function in PowerShell with Add-Type .

The imported function works as expected if I have "single" arguments like this

[Imported.Functions]::SomeCSharpFunction($Arg1,$Arg2,$Arg3)  #This works

But I can't set $Arg1 to be $Thing | $OtherThing $Thing | $OtherThing , because PowerShell interpret the pipe differently, nor can I call the functon

[Imported.Functions]::SomeCSharpFunction( $Thing | $OtherThing, $Arg2, $Arg3) #This doesn't

I tried a few other separators in PowerShell, tried to somehow escape the | character (`|, \\|, '|', none did the trick ) , tried to send a PowerShell array @($Thing,OtherThing) )

My online searches about this were unsuccessful, as search engines seemed to ignore the | character.

A workaround I'm currently using is to define a C# Wrapper function that accepts multiple arguments, and then calls SomeCSharpFunction with these arguments "merged" with a | , but I'm searching for the proper way to do that if there's any

---

Example

In my PowerShell Script, I used Add-Type to "import" a function from Kernel32, like this

$Signature = @"
[DllImport("kernel32.dll")]
public static extern IntPtr OpenProcess(uint dwDesiredAccess, bool bInheritHandle, uint dwProcessId);
"@

$Kernel32 = Add-Type -MemberDefinition $Signature -Name "Process" -Namespace Win32Functions -PassThru

I can then call it inside PowerShell with $Kernel32::OpenProcess($DesiredAccess,$InheritHandle, $ProcessId) , which works perfectly if my arguments are "unique".

Now, in C# I can call it this way (note that I already set PROCESS_VM_OPERATION and PROCESS_VM_READ to their respective uint values)

OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ, false, vProcessId)

I'm trying to achieve the same thing but in PowerShell, as explained in the General part.

Answer 1

To combine the (enum) values, you should use the + operator (if the binary values don't overlap) or the -bor operator (Boolean or, if they do overlap.

If you have constants from the same enum, you can do something like this, too: [FlagsEnumType] "Value1, Value3"

here is a link to a post about using enum values in PowerShell.