Converting a string with underscores to TitleCase

Question

Given this string: "EMAIL_LOG"

I want to convert it to: EmailLog

I have this code that does do the job:

private static string TitleCaseConvert(string title)
{
    CultureInfo cultureInfo = Thread.CurrentThread.CurrentCulture;
    TextInfo textInfo = cultureInfo.TextInfo;
    title = title.Replace("_", " ").ToLower();
    title = textInfo.ToTitleCase(title);
    title = title.Replace(" ", "");
    return title;
}

I was just wondering if there was a better suggestion to do this conversion or one that was more elegant perhaps?

Thanks.

Answer 1

What about doing it in one statement, like this:

private static string TitleCaseConvert(string title)
{ 
   return new CultureInfo("en").TextInfo.ToTitleCase(title.ToLower().Replace("_", " ")).Replace(" ", "");
}

Answer 2

You could use Split() to split on the _ characters and StringBuilder to reconstruct the output string. This should perform better because you are using StringBuilder instead of constructing new strings everytime:

private static string ToPascalCase(string input)
{
    if(input == null)
    {
        throw new ArgumentNullException("input");
    }

    TextInfo textInfo = CultureInfo.CurrentCulture.TextInfo;

    var sb = new StringBuilder();
    foreach(var part in input.Split('_'))
    {
        sb.Append(textInfo.ToTitleCase(part.ToLower()));
    }

    return sb.ToString();
}

Note that I am using the CultureInfo.CurrentCulture static property. I think it more accurately describes what you want...

Fiddle here

Answer 3

If you're after raw performance, you could operate directly on a char array:

private static string TitleCaseConvert(string title)
{
    int wordStart = 0;

    char[] result = new char[title.Length];
    int ri = 0;
    for (int i = 0; i < title.Length; ++i)
    {
        if (title[i] == '_')
        {
            wordStart = i + 1;
        }
        else if (i == wordStart)
        {
            result[ri++] = Char.ToUpper(title[i]);
        }
        else
        {
            result[ri++] = Char.ToLower(title[i]);
        }
    }

    return new String(result, 0, ri);
}

Otherwise, a StringBuilder implementation will probably be shorter and more readable.

Answer 4

You could toss Regex.Replace() at this thing to pick out the first character, dump the underscore, and capitalize it.

title = Regex.Replace("this_is_a_test", @"(^|_)([a-z])", m =>  m.ToString().Replace("_","").ToUpper());

Answer 5

Alternative using Microsoft.VisualStudio :

var title = Strings.StrConv("EMAIL_LOG", VbStrConv.ProperCase).Replace("_", "");

---

Using Humanizer library :

var title = "EMAIL_LOG".ToLower().Pascalize();

Answer 6

You have the _.camelCase function in any library as lodash.

_.camelCase("EMAIL_LOG") // "emailLog"

We add (also from lodash) the _.upperFirst function to put the first character in uppercase.

_.upperFirst( _.camelCase("EMAIL_LOG") ) // "EmailLog"

Camel Case

Camel case is the practice of writing compound words or phrases such that each word or abbreviation in the middle of the phrase begins with a capital letter, with no intervening spaces or punctuation.

Lodash

Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.