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Convert parts of the string into lower case

Henry Vuong

I have a string like this:

string str = "[Title] [A] The GODFATHER [B] Inception [C] Finding Nemo [D] BRAVE [/Title]";

I want to convert all the characters inside the square brackets into lower case, like so:

"[title] [a] The GODFATHER [b] Inception [c] Finding Nemo [d] BRAVE [/title]"

I am thinking of using regular expression but not sure how to use it. Please advice.

1 Reply

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Vulpes14y ago
Try this which uses Regex.Replace with a MatchEvaluator delegate:

using System;
using System.Text.RegularExpressions;

class Test
{
static void Main()
{
string str = "[Title] [A] The GODFATHER [B] Inception [C] Finding Nemo [D] BRAVE [/Title]";
str = Regex.Replace(str, @"\[.+?]", ReplaceMatch);
Console.WriteLine(str);
Console.ReadKey();
}

static string ReplaceMatch(Match m)
{
string s = m.Value;
s = m.Value.Substring(1, s.Length - 2).ToLower();
return String.Format("[{0}]", s);
}
}