Extract part from middle of a string using powershell - powershell

Question

I am working on a code where I need to get the device id from below string
key-vim.host.PlugStoreTopology.Device-0200eb00006000097000029790063053303032344353594d4d4554
device id in this is 60000970000297900630533030323443
Now I wrote the below code where I am getting the index of 6000 and the taking the next 32 chars from there
$strPhrase = $plugs.Device
[int]$check_index = $strPhrase.IndexOf("6000")
$device = "naa."+$strPhrase.Substring($check_index,32)
Most of the cases the index value is 48, so I am able to fetch the proper data. but in few cases(e.g. key-vim.host.PlugStoreTopology.Device-0200e600006000097000029790063053303031343253594d4d4554) the index value is not same, so I am not getting the correct ID.
Please let me know how to get these values

Answer 1

If the string always looks like this (with Device- and then random 10 characters before the actual device id comes), you could do it using the following regex:
$deviceString = 'key-vim.host.PlugStoreTopology.Device-0200eb00006000097000029790063053303032344353594d4d4554'
$deviceString -replace '.*Device-.{10}(.{32}).*', '$1'

Answer 2

You can also get the value going from right to left if the value you're looking for is always the 32 characters long and 12 characters away from the right:
$str = 'key-vim.host.PlugStoreTopology.Device-0200eb00006000097000029790063053303032344353594d4d4554'
$str -replace '^.+(.{32}).{12}$', '$1'
yields 60000970000297900630533030323443
$str = 'key-vim.host.PlugStoreTopology.Device-0200e600006000097000029790063053303031343253594d4d4554'
$str -replace '^.+(.{32}).{12}$', '$1'
yields 60000970000297900630533030313432
or use the string .Substring() method
$str = 'key-vim.host.PlugStoreTopology.Device-0200eb00006000097000029790063053303032344353594d4d4554'
$str.Substring($str.Length - 44).Substring(0,32)
yields 60000970000297900630533030323443