Regex for numbers only

Question

I haven\'t used regular expressions at all, so I\'m having difficulty troubleshooting. I want the regex to match only when the contained string is all numbers; but with the

Answer 1

Your regex will match anything that contains a number, you want to use anchors to match the whole string and then match one or more numbers:

regex = new Regex("^[0-9]+$");

The ^ will anchor the beginning of the string, the $ will anchor the end of the string, and the + will match one or more of what precedes it (a number in this case).