如何使用Regex从文件名中删除字符串“[xyz]”？

Question

I have the filename 0154562A5BS16101[001] in which I would like to remove the "[001]" to just leave 0154562A5BS16101 .

I have tried using the regex:

var output = Regex.Replace(filename, @"[]", string.Empty);

But it throws:

System.ArgumentException: 'parsing '[]' - Unterminated [] set.'

I feel like this is a pretty easy for Regex masters, but I don't have much experience with Regex.

Answer 1

Since [ and ] are metacharacters in regex language, you need to escape them. You also need to tell regex that you want to match everything up to the closing square bracket:

var output = Regex.Replace(filename, @"\[[^\]]*\]", string.Empty);

\\[ and \\] at the ends are square brackets that you want to replace. The [^\\]]* section in the middle matches any number of characters other than the closing square bracket.

Demo.