字符串比较：InvariantCultureIgnoreCase VS OrdinalIgnoreCase？ [英] String comparison: InvariantCultureIgnoreCase vs OrdinalIgnoreCase?

问题描述

这将是更好的code：

  INT指数= fileName.LastIndexOf（，StringComparison.InvariantCultureIgnoreCase。）;
 

或

  INT指数= fileName.LastIndexOf（，StringComparison.OrdinalIgnoreCase。）;
 

解决方案

如果你真的想只匹配点，那么CultureInfo.Ordinal将是最快的，因为没有大小写的区别。

Which would be better code:

int index = fileName.LastIndexOf(".", StringComparison.InvariantCultureIgnoreCase);

or

int index = fileName.LastIndexOf(".", StringComparison.OrdinalIgnoreCase);

解决方案

If you really want to match only the dot, then the CultureInfo.Ordinal would be fastest, as there is no case-difference.

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