c# - TextInfo.ToTitleCase 对于全部大写字符串没有按预期工作

Question

我试图使用 TextInfo.ToTitleCase 将一些名称转换为正确的大小写。它适用于小写和混合大小写的字符串，但对于所有字符均为大写的字符串，它按原样返回输入字符串。
MSDN 文档中没有提及此行为，有任何见解吗？

Answer 1

来自 MSDN文档:

Remarks Generally, title casing converts the first character of a word to uppercase and the rest of the characters to lowercase. However, this method does not currently provide proper casing to convert a word that is entirely uppercase, such as an acronym. The following table shows the way the method renders several strings.

所以这是预期的行为。如果字符串全部大写，您可以先将其小写，然后对其运行 ToTitleCase。