CompareTo function does not behave as I expected in C#

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"01:00".CompareTo("-1:00")

That is supposed to be 1, but it's -1 in C#.

Can someone tell me why? Otherwise I can't trust to use them at all.

Posted 28-Sep-11 6:00am

tryharder

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Sergey Alexandrovich Kryukov 28-Sep-11 12:46pm

Yes, I tested it... How did you want to use it?
--SA

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BobJanova · Answer 1 · 2011-09-28T06:17:00

Solution 1

You're doing a string comparison. String comparisons are done in 'word sort order', which is a culture dependent thing and hyphens are ignored. See MSDN[^].

You probably wanted a numeric or DateTime comparison. String comparisons are not generally a good idea.

Posted 28-Sep-11 6:17am

BobJanova

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tryharder 28-Sep-11 13:54pm

Thank you very much for the answer. (I sort expected that) It's in en-US culture. How can I turn on '-' for comparison in en-US? ( I never expected '-' is ignored in en-US.

tryharder 28-Sep-11 14:09pm

I solved it by using CompareOptions.StringSort option by using string.Compare function. But the option does not seem to imply such action.(that MS, their English is kind bad)