.net - .ToTitleCase 不适用于所有大写字符串

Question

Public Function TitleCase(ByVal strIn As String)
      Dim result As String = ""
      Dim culture As New CultureInfo("en", False)
      Dim tInfo As TextInfo = culture.TextInfo()
      result = tInfo.ToTitleCase(strIn)
      Return result
 End Function

如果我在上面的函数中输入“TEST”。输出是“测试”。理想情况下它会输出“Test”

我也尝试了这篇文章中的代码片段，但无济于事:Use of ToTitleCase

Answer 1

如果没记错的话，ToTitleCase()似乎从来没有适用于所有大写字符串。它基本上要求您在处理之前将字符串转换为小写。

来自 MSDN:

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.

解决方法用法(在 C# 中):

string yourString = "TEST";

TextInfo formatter = new CultureInfo("en-US", false).TextInfo;    
formatter.ToTitleCase(yourString.ToLower());