Question

I want to replace the numbers in the string with _number.We have to fetch the numbers only that dont begin with a character and replace them with a underscore .
Requirement : I have a string, so while processing I want to replace constants with _Constant.
example string :”(a/(b1/8))*100″
output expected :”(a/(b1/_8))*_100″

Please suggest how to do this in asp.net code behind.

Thanks in advance.

Answer 1

Same as cwallenpoole’s, just in C# code behind

string str = '(a/(b1/8))*100';
str = Regex.Replace(str, '([^a-zA-Z])([0-9])', '$1_$2');

Updated:

string str = "(a/(b1/8))*100";
str = Regex.Replace(str, "([^a-zA-Z0-9]|^)([0-9])", "$1_$2");