Question

假设我有一些字符串：CustomerName，CustomerID，ContactNumber，...如何将这些字符串转换为客户名称，客户ID，联系号码？在c＃中是否可以使用任何内置方法来实现？或者我应该手动逐一进行吗？

Answer 1

除了基于正则表达式的方法之外，没有内置的方法可以实现您的目标（参见解决方案2）。

解决方案1 （无正则表达式，自定义方法）：

static string SeparateTitleCases(this string source, string separator = " ")
{
    var result = new StringBuilder();
    char previousChar = default(char);

    for (int i = 0; i < source.Length; i++)
    {
        char currentChar = source[i];

        if (char.IsLower(previousChar) && // Previous char is lowercase
            char.IsUpper(currentChar)) // Current char is uppercase
        {
            result.Append(separator); // Append separator
        }
        result.Append(currentChar);

        previousChar = currentChar;
    }

    return result.ToString();
}

样本用法：

Console.WriteLine("CustomerName".SeparateTitleCases()); // Customer Name
Console.WriteLine("CustomerID".SeparateTitleCases()); // Customer ID
Console.WriteLine("CustomerName CustomerID".SeparateTitleCases()); // Customer Name Customer ID

解决方案2 （正则表达式）：

string pattern = @"([^\s])([A-Z]+[a-z]*)";
string replacement = "$1 $2";            

Console.WriteLine(Regex.Replace("CustomerName", pattern, replacement)); // Customer Name
Console.WriteLine(Regex.Replace("CustomerID", pattern, replacement)); // Customer ID
Console.WriteLine(Regex.Replace("CustomerName CustomerID", pattern, replacement)); // Customer Name Customer ID

Answer 2

您可以使用此扩展方法：

private static readonly HashSet<UnicodeCategory> SeparatorCharCategories = new HashSet<UnicodeCategory>{ UnicodeCategory.UppercaseLetter, UnicodeCategory.TitlecaseLetter, UnicodeCategory.DecimalDigitNumber };

public static String SeparateCharCategories(this string input, string delimiter = " ")
{
    StringBuilder sb = new StringBuilder(input.Length);
    UnicodeCategory lastCharCategory = Char.GetUnicodeCategory(input[0]);
    for(int i = 0; i < input.Length; i++)
    {
        UnicodeCategory charCategory = Char.GetUnicodeCategory(input[i]);
        if (lastCharCategory != charCategory && SeparatorCharCategories.Contains(charCategory))
            sb.Append(delimiter);
        sb.Append(input[i]);
        lastCharCategory = charCategory;
    }
    return sb.ToString();
}

您的样品和其他边缘情况：

var items = new[] { "CustomerName", "CustomerID", "ContactNumber", "PurchaseOrders", "purchaseOrders", "The2Unlimited", "Unlimited2", "222Unlimited", "The222Unlimited", "Unlimited222", "ATeam", "TheATeam", "TeamA", "HTMLGuide", "TheHTMLGuide", "TheGuideToHTML", "HTMLGuide5", "TheHTML5Guide", "TheGuideToHTML5", "TheUKAllStars", "AllStarsUK", "UKAllStars" };
foreach (string str in items)
    Console.WriteLine(str.SeparateCharCategories(" "));

您看到不支持首字母缩略词，因此HTMLGuide仍为HTMLGuide：

Customer Name
Customer ID
Contact Number
Purchase Orders
purchase Orders
The 2 Unlimited
Unlimited 2
222 Unlimited
The 222 Unlimited
Unlimited 222
ATeam
The ATeam
Team A
HTMLGuide
The HTMLGuide
The Guide To HTML
HTMLGuide 5
The HTML 5 Guide
The Guide To HTML 5
The UKAll Stars
All Stars UK
UKAll Stars

Answer 3

我假设CustomerName，CustomerID是属性名称？您需要某种方式来反映这些名称，然后您可以使用Humanizer Lib添加空格。

像这样使用：

"CustomerName".Humanize(LetterCasing.Title) => "Customer Name";

在字符串之间添加空格（例如HelloWord - ＆gt; Hello World）

3 个答案: