Question

Anyone know of a nice efficient function that could convert, for example:
HelloWorld –> Hello World
helloWorld –> Hello World
Hello_World –> Hello World
hello_World –> Hello World

It would be nice to be able to handle all these situations.

Preferably in in VB.Net, or C#.

Answer 1

I don´t know if this is the most efficient way. But this method works fine:

EDIT 1: I have include Char.IsUpper suggestion in the comments

EDIT 2: included another suggestion in the comments: ToCharArray is superfluous because string implements enumerable ops as a char too, i.e. foreach (char character in input)

EDIT 3: I’ve used StringBuilder, like @Dan commented.

    public string CamelCaseToTextWithSpaces(string input)
    {


        StringBuilder output = new StringBuilder();

        input = input.Replace("_", "");

        foreach (char character in input)
        {
            if (char.IsUpper(character))
            { 
                output.Append(' ');             
            }

            if (output.Length == 0)
            {
                // The first letter must be always UpperCase
                output.Append(Char.ToUpper(character));
            }
            else
            {
                output.Append(character);
            }                
        }

        return output.ToString().Trim();
    }