Split string, example here

 var hello = "Hello World";

I'm trying to get the result to be "Hello World" with spans around the matching "l"

    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

CodePudding user response：

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

CodePudding user response：

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

Console.WriteLine(resulStr);

CodePudding user response：

You can do it using string.Join()

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

Instead of

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

.Try online

_{Note: This is just an alternate way aligned to your question. The solution proposed by @fuzzybear or @ASh are more elegant than what I suggested.}