Finding all numbers in a string
c#, find, numbers, regex, string
Solution
You can use a regular expression that matches the numbers, and use the `Regex.Replace` method. I'm not sure what you include in the term "numbers", but this will replace all non-negative integers, like for example `42` and `123456`:
str = Regex.Replace(
str,
@"\d+",
m => (Double.Parse(m.Groups[0].Value) * 1.14).ToString()
);
If you need some other definition of "numbers", for example scientific notation, you need a more elaboarete regular expression, but the principle is the same.
Problem
Part of my app has an area where users enter text into a textBox control. They will be entering both text AND numbers into the textBox. When the user pushes a button, the textBox outputs its text into a string, finds all numbers in the string, multiplies them by 1.14, and spits out the typed text into a pretty little textBlock. Basically, what I want to do is find all the numbers in a string, multiply them by 1.14, and insert them back into the string. At first, I thought this may be an easy question: just Bing the title and see what comes up. But after two pages of now-purple links, I'm starting to think I can't solve this question with my own, very skimpy knowledge of Regex. However, I did find a hearty collection of helpful links: - This article from DotNetPerls - This code snippet at Snipplr - This question on MSDN - This answer on StackOverflow - This article from AssociatedContent - This question on MSDN - This article on Java2s.com Please note: A few of these articles come close to doing what I want to do, by fetching the numbers from the strings, but none of them find all the numbers in the string. Example: A user enters the following string into the textBox: "Chicken, ice cream, 567, cheese! Also, 140 and 1337." The program would then spit out this into the textBlock: "Chicken, ice cream, 646.38, cheese! Also, 159.6 and 1524.18."