C＃正則表達式將camelCase轉換為句子大小寫

Question

在我的示例中， var key = new CultureInfo("en-GB").TextInfo.(item.Key)生成'Camelcase'我可以添加的正則表達式會在第二個'c'之前產生一個空格？

例子：

'camelCase'>'駱駝盒'

'itIsTimeToStopNow'>'現在該停止了'

Answer 1

您如何做到這一點的方法之一。

string input = "itIsTimeToStopNow";
string output = Regex.Replace(input, @"\p{Lu}", m => " " + m.Value.ToLowerInvariant());
output = char.ToUpperInvariant(output[0]) + output.Substring(1);

Answer 2

一種方法是用空格大寫字母替換大寫字母，然后將第一個字符大寫：

var input = "itIsTimeToStopNow";

// add spaces, lower case and turn into a char array so we 
// can manipulate individual characters
var spaced = Regex.Replace(input, @"[A-Z]", " $0").ToLower.ToCharArray();

// spaced = { 'i', 't', ' ', 'i', 's', ' ', ... }

// replace first character with its uppercase equivalent
spaced[0] = spaced[0].ToString().ToUpper()[0];

// spaced = { 'I', 't', ' ', 'i', 's', ' ', ... }

// combine the char[] back into a string
var result = String.Concat(spaced);

// result = "It is time to stop now"