.net - 通常最好使用 StringComparison.OrdinalIgnoreCase 或 StringComparison.InvariantCultureIgnoreCase？

Question

我有一些这样的代码:

If key.Equals("search", StringComparison.OrdinalIgnoreCase) Then
    DoSomething()
End If

我不关心这个案子。我应该使用 OrdinalIgnoreCase、InvariantCultureIgnoreCase 还是 CurrentCultureIgnoreCase？

Answer 1

<强> Newer .Net Docs now has a table to help you decide which is best to use in your situation.

来自 MSDN 的“New Recommendations for Using Strings in Microsoft .NET 2.0”

Summary: Code owners previously using the InvariantCulture for string comparison, casing, and sorting should strongly consider using a new set of String overloads in Microsoft .NET 2.0. Specifically, data that is designed to be culture-agnostic and linguistically irrelevant should begin specifying overloads using either the StringComparison.Ordinal or StringComparison.OrdinalIgnoreCase members of the new StringComparison enumeration. These enforce a byte-by-byte comparison similar to strcmp that not only avoids bugs from linguistic interpretation of essentially symbolic strings, but provides better performance.