Pascal case to human readable with C# extension methods

August 2nd 2008 11:02 pm

I needed to convert some Pascal case strings to human readable strings. Basically I have an enum containing errors, but wanted a nice way to convert them straight to messages for the exceptions that would be thrown.

Here’s how I did it.

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public static string ToHumanFromPascal(this string s)
{
    if (2 > s.Length)
    {
        return s;
    }
 
    var sb = new StringBuilder();
    var ca = s.ToCharArray();
    sb.Append(ca[0]);
    for (int i = 1; i < ca.Length - 1; i++)
    {
        char c = ca[i];
        if (char.IsUpper(c) && (char.IsLower(ca[i + 1]) || char.IsLower(ca[i - 1])))
        {
            sb.Append(' ');
        }
        sb.Append(c);
    }
    sb.Append(ca[ca.Length - 1]);
    return sb.ToString();
}

EDIT: Fixed to handle string of length 0 or 1.

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Posted by darkhelmet under Computers & Programming |

3 Responses to “Pascal case to human readable with C# extension methods”

Dynamic Data and Custom Metadata Providers @ ZDima.net responded on 01 Sep 2008 at 6:18 am #

[...] Line 12: I first check to see if the property already has the DisplayNameAttribute defined. If it does I don’t do anything. But if it doesn’t have this attribute defined, I use the properties name to generate the friendly display name using the ToHumanFromPascal function (which I stole from here). [...]
Steph responded on 19 Sep 2008 at 9:18 am #

Oups!
Your ToHumanFromPascal method will not handle properly strings that are 1 character long.

Add the following at the end:

if (ca.Length > 1)
{
sb.Append(ca[ca.Length – 1]);
}

That’s it!
Stephane.
darkhelmet responded on 19 Sep 2008 at 12:06 pm #

Well to handle that I could do

if (1 == s.length())
return s;

right at the beginning of the function. If the string is only 1 character long, all that is needed it to return the string, so this would solve the problem, unless I’m missing something.