creating a System.Windows.Forms.Textbox that would accept array input - forms

Question

i'm looking for help in creating a System.Windows.Forms.Textbox that would accept array input and treat it as an array input, rn textbox properties looks something like this:
$boxname.AcceptsReturn = $true
$boxname.MultiLine = $true
$boxname.Autosize = $true
$boxname.AcceptsTab = $false
$boxname.Scrollbars = 'Vertical'
If i enter multiline paths like this:
C:\Windows
C:\Program Files
C:\Temp
$boxname.text is treated like one huge string and won't let my "test-path on each item in array" function work properly, i bound it to this box with .Add_TextChanged, what i'm trying to do is to create a box, that will perform a check that entered paths exist once the box is filled.
Is this even possible without additional parsing ? Maybe i'm missing something.

Answer 1

You need to split the multiline text into separate lines and then loop over these lines to do your checks.
$boxname.Add_TextChanged({
# inside the eventhandler, you can refer to the control object itself using automatic variable $this
$this.Text -split '\r?\n' -ne '' | ForEach-Object {
if (-not(Test-Path -Path $_)) {
# path does not exist, do something..
Write-Host "Path '$_' not found!"
}
}
})