powershell highlight the blank space found - powershell

Question

I have the following script which finds a blank space in a csv file by going line by line
$yes = New-Object System.Management.Automation.Host.ChoiceDescription "&Yes", "Retain blank space."
$no = New-Object System.Management.Automation.Host.ChoiceDescription "&No", "Delete blank space."
$n = #()
$f = Get-Content C:\MyPath\*.csv
foreach($item in $f) {
if($item -like "* *"){
$res = $host.ui.PromptForChoice("Title", "want to keep the blank on this line? `n $item", [System.Management.Automation.Host.ChoiceDescription[]]($yes, $no), 0)
switch ($res)
{
0 {$n+=$item}
1 {$n+=$item -replace ' '}
}
} else {
$n+=$item -replace ' '
}
}
$n | Set-Content C:\MyPath\*.csv
The question is: When there is a space found, how can I highlight where it is on a line or put a color there, anything that would ease the process of finding it?
EDIT: don't want to alter the file or the text, this should be done only shown in the console for PowerShell or in the window popup for ISE.

Answer 1

A basic code sample for the method described in the comments using Read-Host for user input and changing the background color with write-host would look like this:
$str= "test abc1 abc2 test3"
$index = $str.IndexOf(" ")
while ($index -gt -1) {
write-host $str.Substring(0,$index) -NoNewline
write-host "_" -foreground "magenta" -NoNewline
$str = $str.Substring( $index + 1, $str.length - $index - 1);
$index = $str.IndexOf(" ")
}
write-host $str.Substring( $index + 1, $str.length - $index - 1);
$confirmation = Read-Host "Do you want to keep the blank on this line?"
if ($confirmation -eq 'y') {
#do action
}
Edit: Included code for multiple white spaces
Code for initial Post:
$n = #()
$f = Get-Content C:\MyPath\*.csv
foreach($item in $f) {
if($item -like "* *"){
#$res = $host.ui.PromptForChoice("Title", "want to keep the blank on this line? `n $item", [System.Management.Automation.Host.ChoiceDescription[]]($yes, $no), 0)
$str = $item
$index = $str.IndexOf(" ")
while ($index -gt -1) {
write-host $str.Substring(0,$index) -NoNewline
write-host "_" -foreground "magenta" -NoNewline
$str = $str.Substring( $index + 1, $str.length - $index - 1);
$index = $str.IndexOf(" ")
}
write-host $str.Substring( $index + 1, $str.length - $index - 1);
$confirmation = Read-Host "Do you want to keep the blank on this line?"
if (($confirmation -eq 'y') -or ($confirmation -eq 'Y')) {
$n+=$item
}
else {
$n+=$item -replace ' '
}
} else {
$n+=$item -replace ' '
}
}
$n | Set-Content C:\MyPath\*.csv