ToPascalCase() C# for all caps 缩写

Question

我正在使用 ReSharper 并试图遵守它的默认规则。

在我的部分代码中，我需要将字符串属性更改为 PascalCase。

我尝试了多种方法，但找不到一种适用于所有大写缩写的方法。

前任：

MPSUser --> Still MPSUser (should be MpsUser)
ArticleID --> Still Article ID (Should be ArticleId)
closeMethod --> Works and changes to CloseMethod

谁能帮我创建一个可以将任何字符串转换为 PascalCase 的方法？谢谢！

Answer 1

我所知道的唯一转换为 的内置方法PascalCase是TextInfo.ToTitleCase，并且它在设计上不处理全大写单词。为了解决这个问题，我制作了一个自定义正则表达式，可以检测所有单词部分，然后将它们单独转换为标题/帕斯卡大小写：

string ToPascalCase(string s)
{
    // Find word parts using the following rules:
    // 1. all lowercase starting at the beginning is a word
    // 2. all caps is a word.
    // 3. first letter caps, followed by all lowercase is a word
    // 4. the entire string must decompose into words according to 1,2,3.
    // Note that 2&3 together ensure MPSUser is parsed as "MPS" + "User".

    var m = Regex.Match(s, "^(?<word>^[a-z]+|[A-Z]+|[A-Z][a-z]+)+$");
    var g = m.Groups["word"];

    // Take each word and convert individually to TitleCase
    // to generate the final output.  Note the use of ToLower
    // before ToTitleCase because all caps is treated as an abbreviation.
    var t = Thread.CurrentThread.CurrentCulture.TextInfo;
    var sb = new StringBuilder();
    foreach (var c in g.Captures.Cast<Capture>())
        sb.Append(t.ToTitleCase(c.Value.ToLower()));
    return sb.ToString();
}

该函数应该处理常见用例：

s           | ToPascalCase(s)
MPSUser     | MpsUser
ArticleID   | ArticleId
closeMethod | CloseMethod