Converting string to title case

Question

I have a string which contains words in a mixture of upper and lower case characters.

For example: string myData = "a Simple string";

I need to convert the first character of each word (separated by spaces) into upper case. So I want the result as: string myData ="A Simple String";

Is there any easy way to do this? I don't want to split the string and do the conversion (that will be my last resort). Also, it is guaranteed that the strings are in English.

Answer 1

MSDN : TextInfo.ToTitleCase

Make sure that you include: using System.Globalization

string title = "war and peace";

TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //War And Peace

//When text is ALL UPPERCASE...
title = "WAR AND PEACE" ;

title = textInfo.ToTitleCase(title); 
Console.WriteLine(title) ; //WAR AND PEACE

//You need to call ToLower to make it work
title = textInfo.ToTitleCase(title.ToLower()); 
Console.WriteLine(title) ; //War And Peace

Answer 2

Try this:

string myText = "a Simple string";

string asTitleCase =
    System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.
    ToTitleCase(myText.ToLower());

As has already been pointed out, using TextInfo.ToTitleCase might not give you the exact results you want. If you need more control over the output, you could do something like this:

IEnumerable<char> CharsToTitleCase(string s)
{
    bool newWord = true;
    foreach(char c in s)
    {
        if(newWord) { yield return Char.ToUpper(c); newWord = false; }
        else yield return Char.ToLower(c);
        if(c==' ') newWord = true;
    }
}

And then use it like so:

var asTitleCase = new string( CharsToTitleCase(myText).ToArray() );

Answer 3

Yet another variation. Based on several tips here I've reduced it to this extension method, which works great for my purposes:

public static string ToTitleCase(this string s) =>
    CultureInfo.InvariantCulture.TextInfo.ToTitleCase(s.ToLower());