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The Contains operator is case insensitive. The Contains operator returns True only when there is an exact match.

If an array contains a match, the Contains operator returns True, as shown here: PS C:\> $noun -contains “hairy-nosed wombat” Because the $noun variable does not have an array element that is equal to the string “hairy-nosed wombat,” the Contains operator returns False. The Contains operator is then used to see if the array contains “hairy-nosed wombat”. This following technique illustrates an array of three values that is created and stored in the variable $noun. To verify input that is received from the command line, you can use the Contains operator to examine the contents of an array of possible values. Today I am happy to provide you with an excerpt from my book Windows PowerShell 3.0 Step by Step, published by Microsoft Press.

Microsoft Scripting Guy, Ed Wilson, is here. This method also works differently in that you are first getting the contents of the file with Get-Content, so this may be useful if you need to perform other operations on those contains after checking for your string's existence.Summary: Microsoft Scripting Guy, Ed Wilson, talks about using the Windows PowerShell Contains operator to work with arrays. So make sure to switch your -eq to -ne or swap your if/else commands around, because currently you are echoing Contains String when the $SEL is $null, which is backwards.Ĭheck SS64 for explanations and useful examples for everything in PowerShell and cmdĪnother way of checking if a string exists in the file would be: If (Get-Content C:\Temp\File.txt | %)īut this doesn't give you an indicaion of where in the file the text exists. In your example, you are defining a string called $SEL and then checking if it is equal to $null (which will of course always evaluate to false, because the string you define is not $null!)Īlso, if the file contains the pattern, it will return something like: C:\Temp\File.txt:1:Test I think this is what you are trying to do: $SEL = Select-String -Path C:\Temp\File.txt -Pattern "Test"