c# 在字符串中查找字符串的出现并将文本环绕匹配的字符

Question

拆分字符串，示例here

 var hello = "Hello World";

我试图让结果成为“Hello World”，并在匹配的“l”周围跨度

    string[] words = hello.ToLower().Split("l");
    var resultString = "";
    
    for (int i = 0; i < words.Length; i++)
    {
        // now we have split the string how do find the missing 'l' and wrap a span around them
        resultString += words[i].ToString();
    }
    // result is heo word
    Console.WriteLine(resultString);
    // Trying to get the result to be "He<span>l</span><span>l</span>o Wor<span>l<span>d

see dotnetfiddle

Answer 1

var result = Regex.Replace(hello, "l", x => $"<span>{x}</span>");

Answer 2

您可以使用 string.Join()

Console.WriteLine(string.Join("<span>l</span>", words));

而不是

//No need to build resultString as well. That mean you can eliminate for loop
Console.WriteLine(resultString);

.Try online

_{注意：这只是与您的问题一致的另一种方式。 @fuzzybear 或@ASh 提出的解决方案比我建议的更优雅。}

Answer 3

string str = "Hello world";
string resulStr = str.Replace("l", "<span>l</span>", StringComparison.InvariantCultureIgnoreCase);

Console.WriteLine(resulStr);

c# 在字符串中查找字符串的出现并将文本环绕匹配的字符

c# Find occurrences of string within a string and wrap text around the matching chars

c#

string

.net-core