Powershell Do Until variable contains string twice

Question

I am trying to run tracert command 2 times by using a do loop. I am doing this simply by counting the number of times "Trace complete." shows. So in the script below, I want the loop to run until the variable contains "Trace complete." 2 times. But obviously its not working.

do {
         $2+= tracert $ip 

   } until ( $2.Contains("Trace complete.") -ge 2) 

 #(  $2 | select-string "Trace complete").length -eq 2

I also tried the select string method but both don't result in loop ending until Trace Complete has appeared twice. Any help please?

Edit 1:

I would also like to store the output of tracert in a variable so i can view it

Martin Brandl · Accepted Answer · 2020-05-27 20:54:40Z

3

The tracert command returns an array of strings thus the Contains() function will not work here.

Here is a solution where I increase the $count variable which is initialized with 0 by 1 every time the tracert command contains the string Trace complete by using a regex. if the joined string doesn't contain the term, I increase the variable by 0.

Finally, the until condition will stop when the $count variable is greater equal 2.

$count = 0
$output = do { 
    $output = tracert 127.0.0.1
    if (($output -join '' -match 'Trace complete\.')) {
        $output # outputs the tracert result
        $count++
    }

} until ( $count -ge 2) 

$output

edited May 27, 2020 at 20:54

answered May 27, 2020 at 20:22

Martin Brandl

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5 Comments

Nebelz Cheez Over a year ago

Hey, Thank you for your answer. Sorry i think I did not clarify what I was asking for but I also want to see the output of tracert. Can that be added to your script?

Martin Brandl Over a year ago

I changed the code. It now outputs your desired result.

Nebelz Cheez Over a year ago

Once the script is finished executing, it shows 2 results of tracert which is correct but when I check the $output variable, i only see the tracert results once instead of twice? Basically I am trying to run the tracert twice and mail the output.

Martin Brandl Over a year ago

I changed the code again. This time the output from the do loop gets captured and stored to the outer $output variable which you can reuse...

Nebelz Cheez Over a year ago

This is EXACTLY what i was looking for. Thank you so much!!! :)

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