Convert all first letter to upper case, rest lower for each word

Question

I have a string of text (about 5-6 words mostly) that I need to convert.

Currently the text looks like:

THIS IS MY TEXT RIGHT NOW

I want to convert it to:

This Is My Text Right Now

I can loop through my collection of strings, but not sure how to go about performing this text modification.

Answer 1

string s = "THIS IS MY TEXT RIGHT NOW";

s = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(s.toLower());

Answer 2

There's a couple of ways to go about converting the first char of a string to upper case.

The first way is to create a method that simply caps the first char and appends the rest of the string using a substring:

public string UppercaseFirst(string s)
    {
        return char.ToUpper(s[0]) + s.Substring(1);
    }

The second way (which is slightly faster) is to split the string into a char array and then re-build the string:

public string UppercaseFirst(string s)
    {
        char[] a = s.ToCharArray();
        a[0] = char.ToUpper(a[0]);
        return new string(a);
    }

Answer 3

I don't know if the solution below is more or less efficient than jspcal's answer, but I'm pretty sure it requires less object creation than Jamie's and George's.

string s = "THIS IS MY TEXT RIGHT NOW";
StringBuilder sb = new StringBuilder(s.Length);
bool capitalize = true;
foreach (char c in s) {
    sb.Append(capitalize ? Char.ToUpper(c) : Char.ToLower(c));
    capitalize = !Char.IsLetter(c);
}
return sb.ToString();

Answer 4

Untested but something like this should work:

var phrase = "THIS IS MY TEXT RIGHT NOW";
var rx = new System.Text.RegularExpressions.Regex(@"(?<=\w)\w");
var newString = rx.Replace(phrase,new MatchEvaluator(m=>m.Value.ToLowerInvariant()));

Essentially it says "preform a regex match on all occurrences of an alphanumeric character that follows another alphanumeric character and then replace it with a lowercase version of itself"

Answer 5

I probably prefer to invoke the ToTitleCase from CultureInfo (System.Globalization) then Thread.CurrentThread (System.Threading)

string s = "THIS IS MY TEXT RIGHT NOW";
s = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(s.ToLower());

but it should be the same as jspcal solution

References:

• http://msdn.microsoft.com/library/kx54z3k7(v=VS.80).aspx
• http://msdn.microsoft.com/library/66w76es3(v=VS.80).aspx