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我试图找到一种有效的方法来获取输入字符串并将每个标点符号 ( . : ? !) 后面的第一个字母大写，然后是一个空格。

输入：

“我吃了点东西。但我没有：相反，没有。你怎么看？我不这么认为！对不起。moi”

输出：

“我吃了点东西。但我没有：相反，没有。你怎么看？我不这么认为！对不起。moi”

显而易见的是拆分它，然后将每个组的第一个字符大写，然后连接所有内容。但它超级丑陋。最好的方法是什么？（我正在考虑Regex.Replace使用MatchEvaluator大写第一个字母但想获得更多想法的a）

谢谢！

4

5 回答 5

6

快速简便：

static class Ext
{
    public static string CapitalizeAfter(this string s, IEnumerable<char> chars)
    {
        var charsHash = new HashSet<char>(chars);
        StringBuilder sb = new StringBuilder(s);
        for (int i = 0; i < sb.Length - 2; i++)
        {
            if (charsHash.Contains(sb[i]) && sb[i + 1] == ' ')
                sb[i + 2] = char.ToUpper(sb[i + 2]);
        }
        return sb.ToString();
    }
}

用法：

string capitalized = s.CapitalizeAfter(new[] { '.', ':', '?', '!' });
于 2011-04-14T14:05:47.683 回答
3

试试这个：

string expression = @"[\.\?\!,]\s+([a-z])";
string input = "I ate something. but I didn't: instead, no. what do you think? i think not! excuse me.moi";
char[] charArray = input.ToCharArray();
foreach (Match match in Regex.Matches(input, expression,RegexOptions.Singleline))
{
    charArray[match.Groups[1].Index] = Char.ToUpper(charArray[match.Groups[1].Index]);
}
string output = new string(charArray);
// "I ate something. But I didn't: instead, No. What do you think? I think not! Excuse me.moi"
于 2011-04-14T14:01:41.847 回答
3

我使用扩展方法。

public static string CorrectTextCasing(this string text)
{
    //  /[.:?!]\\s[a-z]/ matches letters following a space and punctuation,
    //  /^(?:\\s+)?[a-z]/  matches the first letter in a string (with optional leading spaces)
    Regex regexCasing = new Regex("(?:[.:?!]\\s[a-z]|^(?:\\s+)?[a-z])", RegexOptions.Multiline);

    //  First ensure all characters are lower case.  
    //  (In my case it comes all in caps; this line may be omitted depending upon your needs)        
    text = text.ToLower();

    //  Capitalize each match in the regular expression, using a lambda expression
    text = regexCasing.Replace(text, s => (s.Value.ToUpper));

    //  Return the new string.
    return text;

}

然后我可以执行以下操作：

string mangled = "i'm A little teapot, short AND stout. here IS my Handle.";
string corrected = s.CorrectTextCasing();
//  returns "I'm a little teapot, short and stout.  Here is my handle."
于 2011-05-17T14:37:27.060 回答
1

使用 Regex / MatchEvaluator 路线，您可以匹配

"[.:?!]\s[a-z]"

并大写整个比赛。

于 2011-04-14T13:59:04.190 回答
1

文本变量包含字符串的位置

        string text = "I ate something. but I didn't: instead, no. what do you think? i think not! excuse me.moi";
        string[] punctuators = { "?", "!", ",", "-", ":", ";", "." };
        for (int i = 0; i< 7;i++)
        {
            int pos = text.IndexOf(punctuators[i]);
            while(pos!=-1)
            {
                text = text.Insert(pos+2, char.ToUpper(text[pos + 2]).ToString());
                text = text.Remove(pos + 3, 1);
                pos = text.IndexOf(punctuators[i],pos+1);
            }
        }
于 2019-07-31T21:29:13.333 回答