VB.NET LIKE string comparison operator equivalent in C#

Question

I'm a new developer in C# and I'm migrating code from VB.NET to C#. But the LIKE operator is not working in C#, is there another one with the same function?

The VB.NET code I need to convert looks like this::

If (item Like "[A-D]") Then End If If (item Like "[E-H]") Then End If If (item Like "[I-M]") Then End If If (item Like "[N-V]") Then End If

BTW, what kinds of string values does item have? Is it always a single-character string? — Dai
– Dai, Commented Sep 30, 2022 at 19:58

Anderson Constantino · Accepted Answer · 2022-09-30 19:58:38Z

0

LIKE operator does not exist for C#, the solution is to use regular expression.

try this:

if (Regex.IsMatch(item, "^[a-dA-D]+$")) { } if (Regex.IsMatch(item, "^[e-hE-H]+$")) { } if (Regex.IsMatch(item, "^[i-mI-M]+$")) { } if (Regex.IsMatch(item, "^[n-vN-V]+$")) { }

answered Sep 30, 2022 at 19:58

Anderson Constantino

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1 Comment

Dai Over a year ago

If you use RegexOptions.IgnoreCase then you can simplfy those patterns to just "^[A-D]$" - note that VB.NET's Like operator uses [A-B] to denote a single character, so using the one-or-more quantifier (+) will result in different behaviour compared to Like ("AD" won't match Like "[A-D]" but will match Regex.IsMatch( item, "^[A-D]+$" ).

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