Isolate int from string

Question

I have a string which is a word, then =, then a number.

e.g

"RefreshRate=75"

I want to get the integer at the end and store it in an Int. The program uses this value which is stored in an ini file, I need to isolate this value as some other values calculations are based upon it.

How can this be done?

Thank you in advance

Ooooopsss:

Sorry guys, i made a blunder.

The string is actually in the format "RefreshRate=numHz"...i.e "RefreshRate=65Hz"...Im sure this would work, however I get "Incorrect input format error since its adding the Hz as well, and this is throwingthe exception :s

Answer 1

It’s easy! Just use a regular expression!

var m = Regex.Match(input, @"=\s*(-?\d+)");
if (!m.Success)
    throw new InvalidOperationException(
        "The input string does not contain a number.");
return Convert.ToInt32(m.Groups[1].Value);

This extracts the first integer that follows a = in any string. Therefore, if your input string is "Frequency2=47Hz", it will return 47.