Capitalize A String in C#

Posted by Robert Green on May 27, 2009 Leave a comment (0) Go to comments

Capitalizing a string is a rather trivial task in C#. There are 2 ways to approach single word capitalization where each method includes 3 steps. Method 1 uses only strings and string methods while method 2 treats the letter to be capitalized as a char.

Method 1:

Get the first character as a string ( stringToCapitalize.Substring(0,1) )
Transform the first character to uppercase ( stringToCapitalize.Substring(0,1).ToUpper() )
Append the rest of the string ( stringToCapitalize.Substring(0,1).ToUpper() + stringToCapitalize.Substring(1) )

public static string Capitalize(string toCapitalize) {
    try {
        if(toCapitalize.Length > 1) {
            toCapitalize = toCapitalize.Substring(0, 1).ToUpper() + toCapitalize.Substring(1);
        }
    } catch(Exception ex) {
        ExceptionHandling.ExceptionLogging(ex, "Error:Capitalize.");
    }
    return toCapitalize;
}

Method 2:

Get the first character as a char ( stringToCapitalize[0] )
Transform the first character to uppercase using the char.toUpper method ( char.toUpper(stringToCapitalize[0]) )
Append the rest of the string ( char.toUpper(stringToCapitalize.Substring[0]) + stringToCapitalize.Substring(1) )

public static string Capitalize(string toCapitalize) {
    try {
        if(toCapitalize.Length > 1) {
            toCapitalize = char.ToUpper(toCapitalize[0]) + toCapitalize.Substring(1);
        }
    } catch(Exception ex) {
        ExceptionHandling.ExceptionLogging(ex, "Error:Capitalize.");
    }
    return toCapitalize;
}

Using either of these methods you could create an extension method as well. Something like this:

public static class MyExtensions
{
    public static string Capitalize(this String toCapitalize)
    {
        if(toCapitalize.Length > 1) {
            toCapitalize = toCapitalize.Substring(0, 1).ToUpper() + toCapitalize.Substring(1);
        }
        return toCapitalize;
    }
}