cant correctly pass array from c # to powershell

Question

Hey! Colleagues.
Sorry for my English, I use an automatic translator.

Here is my powershell script (packed in exe)

 param  
    (  
    [string]$User,  
    [String[]]$Computers  
    )  
      
    [System.Windows.Forms.MessageBox]::Show("сервера" + $computets)  
    foreach ($computer in $Computers)  
    {  
    [System.Windows.Forms.MessageBox]::Show("сервера" + $computer)  
    try  
    {  
      
    Invoke-Command -ComputerName $computer -ScriptBlock {  
    param ($user)  
    $localpath = 'c:\users\' + $user  Get-WmiObject -Class Win32_UserProfile | Where-Object { $_.LocalPath -eq $localpath } |  Remove-WmiObject} -ArgumentList $user  
  
[System.Windows.Forms.MessageBox]::Show('Пользователь:' + $User + ' очищен с фермы:' + $computer)  
    }  
    catch   
    {  
    [System.Windows.Forms.MessageBox]::Show('Пользователь не вышел из сеанса на сервере '+$computer)  
    }  
    }  
      

from C # I am passing a value to it in the form:

 public static void DeleteUserProfile(string user, string ws)  
        {  
            string query = TerminalServer.Where(x => x == ws).FirstOrDefault().ToUpper();  
  
            string[] RDS = { "ALDEBARAN", "ALTAIR", "ANTARES", "TANATOS"};  
            string[] FDRDS = { "PHOEBE", "JULIET"};  
            string[] JDRDS = { "Erriapo" };  
            string[] WHRDS = { "Thrym" };  
            string[] Servers = { "Aldebaran", "Altair", "Antares", "Tanatos" };  
  
  
              
  
            if ((query == "ALDEBARAN") || (query == "ALTAIR") || (query == "ANTARES") || (query == "TANATOS"))  
            {  
                
                    ProcessStartInfo startInfo = new ProcessStartInfo(@"\\poison\rf\Reg\clearprofiles.exe");  
                    startInfo.WindowStyle = ProcessWindowStyle.Hidden;  
                    startInfo.Arguments = $"-user {user} -Computers {Servers}";  
                    Process.Start(startInfo);  
                 
            }  
    }  

I can't figure out how to pass an array to powershell
:(

I created a breakpoint in the code PS and get the value Servers param = "system.string[]";

[String[]]$Computers
[System.Windows.Forms.MessageBox]::Show("Servers param" + $computers)

Answer 1

@Бутунин Клим Юрьевич , based on my test, If we want to pass array from C# to PowerShell, we have to use the following format string to transfer it.

string result=('Aldebaran','Altair','Antares','Tanatos')  

Here is a code example you can refer to.

private void button1_Click(object sender, EventArgs e)  
        {  
            DeleteUserProfile("Administrator");  
        }  
  
  
        public static void DeleteUserProfile(string user)  
        {  
  
            string[] RDS = { "ALDEBARAN", "ALTAIR", "ANTARES", "TANATOS" };  
            string[] FDRDS = { "PHOEBE", "JULIET" };  
            string[] JDRDS = { "Erriapo" };  
            string[] WHRDS = { "Thrym" };  
            String[] Servers = { "Aldebaran", "Altair", "Antares", "Tanatos" };  
            string result = string.Empty;  
            foreach (string item in Servers)  
            {  
                result = result+"'" + item + "'"+",";  
            }  
            result = "(" + result + ")";  
            result = result.Remove(result.Length - 2,1);  //('Aldebaran','Altair','Antares','Tanatos')  
            Process process = new Process();  
            ProcessStartInfo startInfo = new ProcessStartInfo();  
            startInfo.FileName = @"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe";  
            startInfo.CreateNoWindow = true;  
            startInfo.Arguments = $"D:\\TestPower.ps1 -user {user} -Computers {result}";  
            startInfo.RedirectStandardOutput = true;  
            startInfo.UseShellExecute = false;  
            process.StartInfo = startInfo;  
            process.Start();  
            process.WaitForExit();  
  
        }  

Also, I modified your PowerShell script so that I make a test.

using namespace System.Windows.Forms

param  
     (  
     [string]$user,  
     [String[]] $computers  
     )  
Add-Type -AssemblyName System.Windows.Forms  
[System.Windows.Forms.MessageBox]::Show("Hello " + $user)  
foreach ($computer in $computers)  
     {  
     [System.Windows.Forms.MessageBox]::Show("Hello " + $computer)  
      }  

Result: