Powershell scripts can easily be terminated by the user pressing ctrl-c. Is there a way for a Powershell script to catch ctrl-c and ask the user to confirm whether he really wanted to terminate the script?
Checkout this post on the MSDN forums.
[console]::TreatControlCAsInput = $true
while ($true)
{
write-host "Processing..."
if ([console]::KeyAvailable)
{
$key = [system.console]::readkey($true)
if (($key.modifiers -band [consolemodifiers]"control") -and ($key.key -eq "C"))
{
Add-Type -AssemblyName System.Windows.Forms
if ([System.Windows.Forms.MessageBox]::Show("Are you sure you want to exit?", "Exit Script?", [System.Windows.Forms.MessageBoxButtons]::YesNo) -eq "Yes")
{
"Terminating..."
break
}
}
}
}
If you don't want to use a GUI MessageBox for the confirmation, you can use Read-Host instead, or $Host.UI.RawUI.ReadKey() as David showed in his answer.
while ($true)
{
Write-Host "Do this, do that..."
if ($Host.UI.RawUI.KeyAvailable -and (3 -eq [int]$Host.UI.RawUI.ReadKey("AllowCtrlC,IncludeKeyUp,NoEcho").Character))
{
Write-Host "You pressed CTRL-C. Do you want to continue doing this and that?"
$key = $Host.UI.RawUI.ReadKey("NoEcho, IncludeKeyDown")
if ($key.Character -eq "N") { break; }
}
}
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