Question

I have multiple file names that I need to parse. One commonality between these files is that level (revision) is the last letter before the dot. I need to have a regular expression that that accepts the hyphen (-), also.

Examples of file names:

1. 068394B.dwg
2. 06841213E.dwg
3. 420676-.dwg

Answer 1

try this

@"^\d*[a-zA-Z\-]\.dwg$"

The syntax should be the same for c# too

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If you need to capture groups, you can use parenthesies to do that.

so for instance:

@"^(\d*)([a-zA-Z\-])\.dwg$"

will capture your number and your code at the end.

you Match should have a collection called Groups the first one will be the full match, where the subsequent ones will be the groups in the parens.

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more details at This reference page

Here’s a sample