CODEWITHSUNDEEP
c#regex
Kiquenet
Kiquenet

Reputation: 14996

Regular Expression using character “-” in C#

I use VS 2012 and RegExp in C#.
I have an regular expression like this:

^CREATE OR REPLACE PACKAGE ([\w]+).([\w]+) IS

I read contents from a file.

I have troubles with character -

Test_A_B is OK.
Test-A_B is KO.

I tried using Regex.Escape but it's still wrong.

Unit test code:

var pattern1 = @"^CREATE OR REPLACE PACKAGE ([\w]+).([\w]+) IS";
var regexPackage = new Regex(pattern1);

var contents = @"CREATE OR REPLACE PACKAGE ZZZ.Test_A_B IS";
match1 = regexPackage.Match(contents);
Assert.IsTrue(match1.Success);
Assert.AreNotEqual(0, match1.Groups.Count);
Assert.AreEqual("Test_A_B", match1.Groups[2].Value);

contents = @"CREATE OR REPLACE PACKAGE ZZZ.Test-A_B IS";
//contents = Regex.Escape(contents);
match1 = regexPackage.Match(contents);
Assert.IsTrue(match1.Success); <===== FAILS
Assert.AreNotEqual(0, match1.Groups.Count);
Assert.AreEqual("Test-A_B", match1.Groups[2].Value);

Any suggestions?

Upvotes: 0

Views: 64

Answers (1)

Lucas Trzesniewski
Lucas Trzesniewski

Reputation: 51330

\w includes alphanumeric characters as well as the underscore. It doesn't include the dash.

Simply replace [\w]+ in your regex with [-\w]+ to include the dash.

As a side note, the dash has a special meaning in character classes. It either needs to be first in the class, or last, or be escaped with a backslash.

Upvotes: 3

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