包含$的文件中的Powershell搜索字符串

Question

I want to search the following string in a text file: $$u$$

I tried select-string , get-content , .Contains . It seems to me it's not possible.

I used this for the search as a variable: $ToSearch = "'$'$u'$'$"

It always gives false result.

Answer 1

It is because most search filters are relying on regex. The $ symbol in regex needs to be escaped

Without knowing more of what you're trying to accomplish I can't give much of an example, but here is one:

'this is a $$u$$ test' -replace "\$",""

The '\\' is what is escaping the character - meaning to translate it literally.

Edit: Per comment

$Val = 'this is a $$u$$ test'
$Val | Select-String "\$+\w\$+" -quiet

-Quiet switch returns t/f rather than a string value.

Answer 2

The $ is a reserved character in regex, which is complicating your search.

The default search pattern type for Select-String is regex, but you can also specify -Simplematch or -Wildcard , either of which will eliminate the need to escape the $. If you use -Wildcard, you'll need to include the wilcard * at either end of the match - '*$$u$$*' . For simplematch, just use the string you want to match for - '$$u$$' .