Regex to match digit to letter transition so i can put space between them

Is there a way to build a rege开发者_C百科x to match a digit to letter transition for e.g.:

e2, s5, c8

I have a .net application that opens a file content into a richtextbox, I want this application to find a transition from digit to letter and separate letter and digit with a white space.

Try this:

string resultString = null;
try {
    resultString = Regex.Replace(subjectString, @"(\d{1})([:alpha:]{1})", "$1 $2", RegexOptions.IgnoreCase);
} catch (ArgumentException ex) {
    // Syntax error in the regular expression
}

MATCH ANY:

e2, s5, c8

REGEX:

([a-z]) (\d) ,

OR:

([a-z])(\d),

Group1 is letters, group2 is numbers, rebuild string with group1 + " " + group2, to give: e 2 , s 5, c 8

Test here: http://gskinner.com/RegExr/