Singol Thread Error (STA) when open script by powershell

Question

hi everyone. this is my script:
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
function global:stamp(){
param([string]$string)
$string=$string.replace(' ',',')
$string | Out-File "C:\test.txt" -Append
$form.close()
$form = New-Object System.Windows.Forms.Form
[int32]$x=(Get-WmiObject -Class Win32_DesktopMonitor | ForEach-Object {$_.ScreenWidth}) - 100
[int32]$y=(Get-WmiObject -Class Win32_DesktopMonitor | ForEach-Object {$_.ScreenHeight}) - 100
$x1 = $x - 100
$y1 = $y - 400
$form.Size = New-Object System.Drawing.Size($x,$y)
$dataGridView = New-Object System.Windows.Forms.DataGridView
$dataGridView.Size=New-Object System.Drawing.Size($x1,$y1)
$dataGridView.Location = New-Object System.Drawing.Size(100,40)
$dataGridView.AutoSizeColumnsMode = "Fill"
$go = New-Object System.Windows.Forms.Button
$go.Location = New-Object System.Drawing.Size(300,450)
$go.Size = New-Object System.Drawing.Size(80,30)
$go.text = "ok"
$form.Controls.Add($go)
$form.Controls.Add($dataGridView)
$Column0 = New-Object System.Windows.Forms.DataGridViewTextboxColumn
$Column0.HeaderText = "Pacchetti"
$Column0.Width = 300
$dataGridView.Columns.Add($Column0)
$Column1 = New-Object System.Windows.Forms.DataGridViewComboBoxColumn
$Column1.HeaderText = "Azione"
$Column1.width = 300
$Options="Promozione","Regressione"
$Column1.Items.AddRange($Options)
$dataGridView.Columns.Add($Column1)
$Column2 = New-Object System.Windows.Forms.DataGridViewComboBoxColumn
$Options2="Promozione","Regressione", "Null"
$Column2.HeaderText = "Tipo_Dipendenza"
$Column2.Width = 300
$Column2.Items.AddRange($Options2)
$dataGridView.Columns.Add($Column2)
$Column3 = New-Object System.Windows.Forms.DataGridViewTextboxColumn
$Column3.HeaderText = "Pacchetti_Dipendenti"
$Column3.Width = 300
$dataGridView.Columns.Add($Column3)
$go.Add_Click(
$p=$true
$intestazione="Pkt,Azione,Dip,PktDip" | Out-File "C:\test.txt"
$data=New-Object System.Collections.ArrayList
for($j=0;$j -le ($dataGridView.RowCount - 2); $j++){
#$dataGridView.Rows[$j].Selected = $true
for($i=0;$i -le ($dataGridView.Columns.Count -1);$i++){
$export=$dataGridView.Rows[$j].Cells[$i].Value
$columnName = $dataGridView.Columns[$i].HeaderText
$riga = $j+1
switch ($i){
0 { if(!($log=cmd /c hudp -b harvest -en HarvestOper -st Accettazione -usr c.nosari -pw harvest -pn QueryPkg -ap $export -o " C:\log.txt" | Select-String -Pattern "NON ESISTE")){$data.Add($export)}
else{[System.Windows.Forms.MessageBox]::Show("Campo $columnName riga $riga Errato","WARNING",0,48)
$p=$false
1 {$data.Add($export)}
2 {$data.Add($export)}
3 { if(!($log=cmd /c hudp -b harvest -en HarvestOper -st Accettazione -usr c.nosari -pw harvest -pn QueryPkg -ap $export -o " C:\log.txt" | Select-String -Pattern "NON ESISTE") -or $export -eq ""){$data.Add($export)}
else{[System.Windows.Forms.MessageBox]::Show("Campo $columnName riga $riga Errato","WARNING",0,48)
$p=$false
if(!($p)){break}
if($p){
stamp $data
$data.clear()
else{
break
[void]$form.ShowDialog()
When i execute it by powershell i receive thi error:
System.ThreadingThreadStateException:
Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it.
System.Windows.Forms.ComboBoxset_AutoCompleteSource (Autoco
mpleteSource value)
System.Windows.Forms.DataGridViewComboBoxCell.InitializeEditingCo
ntrol (1nt32 rowlndex,, Object
initialFormattedValue,,
DataGridViewCellStyle dataGridViewCellStyle)
System.Windows.Forms.DataGridViewJnitializeEditingC ontrolValue
(Dat
aGridViewCellStyle & dataGridViewCellStyle,,
DataGridViewCell
DataGridViewCell)
To replace this default dialog box,
handle the event
DataError.
How can i fix this? where do i have to insert what it say?
Thanks so much
Cristian

Answer 1

I forget which versions this applies to, but some of the older versions of PowerShell launch the console in MTA mode by default, while the ISE is always STA. On my computer with PowerShell 4.0 installed, this is no longer the case; both ISE and Console both
use STA by default.
Anyhow, just use the -Sta switch when launching PowerShell.exe, and you'll be able to run that script. You could even add code to the beginning of the script which detects the current apartment state, and relaunches a new copy of powershell.exe if needed,
very similar to code which people have used to detect whether PowerShell.exe was running in an elevated process. Something along these lines:
if ([System.Threading.Thread]::CurrentThread.ApartmentState -eq [System.Threading.ApartmentState]::MTA)
powershell.exe -Sta -File $MyInvocation.MyCommand.Path
return
# Rest of your script code here