run and handle output from ps1 script - powershell

Question

The goal : get all logged in / logged out users from the system.
Those users who logged in / logged out by using remote desktop connection.
My script :
Param(
[array]$ServersToQuery = (hostname),
[datetime]$StartTime = "January 1, 1970"
)
foreach ($Server in $ServersToQuery) {
$LogFilter = #{
LogName = 'Microsoft-Windows-TerminalServices-LocalSessionManager/Operational'
ID = 21, 23, 24, 25
StartTime = $StartTime
}
$AllEntries = Get-WinEvent -FilterHashtable $LogFilter -ComputerName $Server
$AllEntries | Foreach {
$entry = [xml]$_.ToXml()
[array]$Output += New-Object PSObject -Property #{
TimeCreated = $_.TimeCreated
User = $entry.Event.UserData.EventXML.User
IPAddress = $entry.Event.UserData.EventXML.Address
EventID = $entry.Event.System.EventID
ServerName = $Server
}
}
}
$FilteredOutput += $Output | Select TimeCreated, User, ServerName, IPAddress, #{Name='Action';Expression={
if ($_.EventID -eq '21'){"logon"}
if ($_.EventID -eq '22'){"Shell start"}
if ($_.EventID -eq '23'){"logoff"}
if ($_.EventID -eq '24'){"disconnected"}
if ($_.EventID -eq '25'){"reconnection"}
}
}
$Date = (Get-Date -Format s) -replace ":", "."
$FilePath = "$env:USERPROFILE\Desktop\$Date`_RDP_Report.csv"
$FilteredOutput | Sort TimeCreated | Export-Csv $FilePath -NoTypeInformation
Write-host "Writing File: $FilePath" -ForegroundColor Cyan
Write-host "Done!" -ForegroundColor Cyan
#End
I really do not understand ps1 scripts. I've found this script but i want to use it for my purposes.
When i try to execute it with c# :
Scenario 1 :
string scriptText = "C:\\MyPath\\script.ps1";
try
{
Runspace runspace = RunspaceFactory.CreateRunspace();
// open it
runspace.Open();
// create a pipeline and feed it the script text
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript(scriptText);
Collection<PSObject> results = pipeline.Invoke();
It throws an error :
ps1 is not digitally signed.
Second scenario :
using (PowerShell PowerShellInstance = PowerShell.Create())
{
PowerShellInstance.AddScript(str_Path);
Collection<PSObject> PSOutput = PowerShellInstance.Invoke();
if (PowerShellInstance.Streams.Error.Count > 0)
{
// error records were written to the error stream.
// do something with the items found.
}
}
Streams are always empty. Actually it always count 0 rows.
Any idea/suggestion how to get this done ?

Answer 1

I used Write-Output instead of Write-Host into the end of the script without generating csv file. Credits to this.