String manipulation using PowerShell

Adding to a string

$strValue = "Test"
$strValue += "ing"

$strValue
Testing

Removing info from a string using Replace()

$stvValue = "Testing"
$strValue = $strValue.Replace("ing","")

$strValue
Test

Remove part of a string using Remove()

$strValue = "Test String"

Remove from index 4 to end of string
$strValue.Remove(4)
Test

Remove from index 0 to 5
$strValue.Remove(0,5)
String

Remove part of a string using Substring()

$strString = "Test String"

Remove from 0 to index 4
$strValue.Substring(0,4)
Test

Remove from index 5 to end of string
$strValue.Substring(5)
String

Split a string into multiple sections and select only the part you need using its index.

Very useful for email addresses

$StrValue = "username@domain.com"
$strValue.Split('@')
username
domain.com

$strValue.Split('@')[0]
username

To Lowercase() or Uppercase()

"TEST".ToLower()
test

"test".ToUpper()
TEST

Remove Whitespace (either spaces at beginning or end)

Remove whitespace at beginning and end of string
$strValue = "Test String "

$strValue.Length
12

$strValue.Trim().Length
11

TrimStart()
Removes Whitespace at the beginning of the string
TrimEnd()
Removes Whitespace at the end of the string

Remove specific part of a string that has a dynamic index

$strValue = "This is a test string"
$stringIndex = $strValue.IndexOf("string")
$stringIndex
15

$strValue.Remove($stringIndex)
This is a test

$strValue.Substring(0,$stringIndex)
This is a test
 

Change a string to a date format

$stringDate = "2021 04 01"

$Date = [datetime]::Parse($stringDate)
$Date
Thursday, 01 April 2021 00:00:00

Change a date to a string

$Date.ToString("yyyy-MM-dd")
2021-04-01

More date formats