Check if a string is a valid RegEx Pattern VB.NET

Question

ok I have the following strings

"^[a-z]*$"

and

"a-z"

now what I want with those two strings is to check if they are valid Regular Expressions strings in VB.NET. I really have no idea how can I make it... but I tried something below

Try
  Dim regex As Regex = New Regex("a-z")
  Return "valid regex"
Catch ex As Exception
 Return "not valid regex"
End Try

but my solution above seems not really good. Is there much better solution?

sloth · Accepted Answer · 2013-07-30 07:11:53Z

7

No, there is no other solution (you could of course reimplement the regex parser, but that would be an error-prone hell of work).

I would prefer catching the specific ArgumentException that the Regex constructor throws if the regex is invalid other than just Exception.

answered Jul 30, 2013 at 7:11

sloth

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